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Contents
- The climate of Roy
- The best time to visit Roy
- The worst time to visit Roy
- Spring weather in Roy
- Summer weather in Roy
- Autumn weather in Roy
- Winter weather in Roy
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
The climate of Roy
Located in Utah, USA, the overall climate of Roy, falls under the Köppen climate classification 'Csa'. This typology is primarily characterized by a Mediterranean nature, with a hot summer season. Extreme temperatures throughout the year are observed from 21.6°F (-5.8°C) to 83.8°F (28.8°C). Humidity levels range significantly from 37% to 83% throughout the year. The climatic factors contributing to these conditions include the amount of sunlight received, wind patterns, and rainfall levels.
Examining the weather data closely, the fluctuation range for temperature registers between 21.6°F (-5.8°C) during the low months and reaching up to 83.8°F (28.8°C) during the hottest months. The humidity, conversely, is the highest in the beginning and at the end of the year, with the lowest recorded during the middle of the year, reinforcing the Mediterranean nature of the climate. Rainfall levels also fluctuate significantly, starting at 1.14" (29mm) and dipping to 0.43" (11mm) in the driest month.
A distinguishing feature of the Roy climate is the presence of snowfall during a significant part of the year, with it starting in December at 6.89" (175mm), diminishing subsequently and trickling down to trace levels by the end of May, before it recommences in November. The distinct presence of snowfall sets a unique pattern in this geographic location.
Examining the weather data closely, the fluctuation range for temperature registers between 21.6°F (-5.8°C) during the low months and reaching up to 83.8°F (28.8°C) during the hottest months. The humidity, conversely, is the highest in the beginning and at the end of the year, with the lowest recorded during the middle of the year, reinforcing the Mediterranean nature of the climate. Rainfall levels also fluctuate significantly, starting at 1.14" (29mm) and dipping to 0.43" (11mm) in the driest month.
A distinguishing feature of the Roy climate is the presence of snowfall during a significant part of the year, with it starting in December at 6.89" (175mm), diminishing subsequently and trickling down to trace levels by the end of May, before it recommences in November. The distinct presence of snowfall sets a unique pattern in this geographic location.
The best time to visit Roy
Factoring in all aspects of the climate, including temperatures, sunshine hours, and rainfall, the most optimal period to visit Roy is projected to be between June and August. These summer months are typified by an agreeable range of average high temperatures from 74.3°F (23.5°C) to 81.9°F (27.7°C), optimal for outdoor activities. Complementing the warmer temperatures, the city receives extended sunshine, hovering between 11.9 to 14.8 daylight hours per day.
Additionally, with minimal rainfall, an average of 0.43" (11mm) to 0.47" (12mm), and relatively lower humidity, from 37% to 38%, this period ensures an enjoyable experience for visitors. Moreover, wind speeds remain stable, averaging around 6mph (9.7km/h), reinforcing this period as the most conducive for tourism.
Additionally, with minimal rainfall, an average of 0.43" (11mm) to 0.47" (12mm), and relatively lower humidity, from 37% to 38%, this period ensures an enjoyable experience for visitors. Moreover, wind speeds remain stable, averaging around 6mph (9.7km/h), reinforcing this period as the most conducive for tourism.
The worst time to visit Roy
Considering weather conditions, specifically temperatures, precipitation, and sunshine, the least favorable time for a visit to Roy would typically be from December to February. The temperature gradient during this period fluctuates from an average high of 33.4°F (0.8°C) to 37.2°F (2.9°C) to a low of 21.6°F (-5.8°C) to 25.2°F (-3.8°C), marking it as the coldest time of the year.
Along with low temperatures, this period also experiences snowfall, with an average accumulation ranging from 4.37" (111mm) to 6.89" (175mm) across these months. Additionally, the daylight hours decrease significantly to an average range from 9.3 to 10.7 hours per day, with lower amounts of sunshine, 5.6 to 6.8 hours per day. These conditions are further exacerbated by high humidity levels, averaging 78% to 83%.
Along with low temperatures, this period also experiences snowfall, with an average accumulation ranging from 4.37" (111mm) to 6.89" (175mm) across these months. Additionally, the daylight hours decrease significantly to an average range from 9.3 to 10.7 hours per day, with lower amounts of sunshine, 5.6 to 6.8 hours per day. These conditions are further exacerbated by high humidity levels, averaging 78% to 83%.
Spring weather in Roy
Spring ushers in a significant change in weather conditions in Roy, transitioning from the colder months. During this season, spanning March, April, and May, average high temperatures move from 45.7°F (7.6°C) to 62.8°F (17.1°C), and lows from 32.5°F (0.3°C) to 43.5°F (6.4°C). This period also sees a decrease in snowfall from 3.15" (80mm) to zero by the end of May.
Humidity reduces drastically during this period from 69% to 53%, with rainfall levels oscillating between 1.02" (26mm) and 1.14" (29mm). Daylight hours increase from 12 hours to 14.5 hours with extended sunshine hours from 8.5 hours to 11.1 hours, making this an agreeable season to visit Roy.
Humidity reduces drastically during this period from 69% to 53%, with rainfall levels oscillating between 1.02" (26mm) and 1.14" (29mm). Daylight hours increase from 12 hours to 14.5 hours with extended sunshine hours from 8.5 hours to 11.1 hours, making this an agreeable season to visit Roy.
Summer weather in Roy
Roy's summer months, June through August, are marked by the warmest temperatures, the longest days, and the least amounts of rainfall. The high summer temperatures range from 74.3°F (23.5°C) to 83.8°F (28.8°C) with lows from 52°F (11.1°C) to 60.4°F (15.8°C). Relative humidity drops to the lowest levels of the year, ranging from 37% to 38%, with an average rainfall of around 0.43" (11mm) to 0.47" (12mm), the lowest of the year.
Sunshine hours reach their peak, from 11.9 to 14.8 daylight hours per day, this along with least average rain makes summer in Roy a period of prolonged clear skies.
Sunshine hours reach their peak, from 11.9 to 14.8 daylight hours per day, this along with least average rain makes summer in Roy a period of prolonged clear skies.
Autumn weather in Roy
Autumn in Roy witnesses a gradual decrease in temperatures, with average highs moving down from 72.5°F (22.5°C) in September to 45.5°F (7.5°C) in November and lows, from 52.7°F (11.5°C) to 32.2°F (0.1°C). While the humidity begins to increase again, moving from 44% to 64%, rainfall levels hold steady from 0.98" (25mm) to 0.83" (21mm).
Daylight hours diminish from 12.5 hours in September to 9.9 hours in November, but this season also witnesses the re-emergence of snowfall, albeit at very minimal rates, starting at 0.39" (10mm) in September and increasing to 2.68" (68mm) by the end of November.
Daylight hours diminish from 12.5 hours in September to 9.9 hours in November, but this season also witnesses the re-emergence of snowfall, albeit at very minimal rates, starting at 0.39" (10mm) in September and increasing to 2.68" (68mm) by the end of November.
Winter weather in Roy
During winter from December to February, Roy experiences the coldest temperatures of the year as well as significant snowfall. High winter temperatures oscillate between 33.4°F (0.8°C) to 37.2°F (2.9°C), with lows ranging from 21.6°F (-5.8°C) to 25.2°F (-3.8°C). Roy sees a high relative humidity during this season, from 77% to 83%.
Heightened snowfall is characteristic of this season with amounts varying from 4.37" (111mm) in December to 5.43" (138mm) in February. Daylight hours are the shortest during this time of the year, offering only from 9.3 hours to 10.7 hours of day light. Despite these conditions, this winter period bestows a distinct charm to Roy, particularly appealing to those with a fondness for winter sports and activities.
Heightened snowfall is characteristic of this season with amounts varying from 4.37" (111mm) in December to 5.43" (138mm) in February. Daylight hours are the shortest during this time of the year, offering only from 9.3 hours to 10.7 hours of day light. Despite these conditions, this winter period bestows a distinct charm to Roy, particularly appealing to those with a fondness for winter sports and activities.
Weather in January
January sees Roy, Utah enveloped in chilling temperatures, reinforcing its place as one of the coldest months of the year. Icy winds bring the average low temperature to 21.6°F (-5.8°C), and snowfall reaches its peak at 6.89" (175mm). Weather in January »
Weather in February
The icy grip of winter persists through February, although a slight alleviation occurs in comparison to January's brutal cold. Despite the mercury rising to an average high of 37.2°F (2.9°C), it is still deemed a cold month. Weather in February »
Weather in March
March marks a significant deviation from winter’s extreme cold temperatures. A visible increase in temperature--going as high as 45.7°F (7.6°C)--exemplifies this change. Concurrently, snowfall captures a steady downtrend, culminating in a much-anticipated interaction with spring. Weather in March »
Weather in April
April embodies a predictable rise in temperature and weather conditions associated with spring. Snowfall drops to a mere 1.22" (31mm), while rainfall mildly increases, making for damp yet warming conditions. Showers nourish the soil, following which blooming flowers grace the landscapes. Weather in April »
Weather in May
May in Roy, Utah, brings a moderating effect on the temperature, reaching a comfortable high of 62.8°F (17.1°C). With daylight hours rising above 14 hours a day, longer sun exposure becomes more frequent. Meanwhile, snowfall virtually ceases to exist, signaling a definitive end to winter. Weather in May »
Weather in June
June presents clear, warm, and sunny weather conditions in Roy. Summer arrives with the highest relative visibility of 6 miles, making sky-gazing activities prevalent among enthusiasts. While the temperature rises, humidity, on the contrary, starts to decline. Weather in June »
Weather in July
July stands as the pinnacle of the summer season, bringing the highest temperatures experienced throughout the year. Emphasizing this summer peak, average high temperatures rise to a sweltering 83.8°F (28.8°C). Despite the heat, humidity remains relatively low, making the days more bearable. Weather in July »
Weather in August
August shadows the peak heat of July but sustains the summer warmth, encouraging continued outdoor activities. Despite some cooling, the atmosphere remains balmy, with temperatures maintaining their place in the 80s. However, increased cloud coverage starts animating the skies, hinting at the approaching autumn season. Weather in August »
Weather in September
September in Roy delineates a noticeable reduction in the summer heat, with a significant cooling effect—as temperatures decrease to a modest 72.5°F (22.5°C)—from the preceding summer months. The beginning of fall characterizes this month, with days gradually becoming shorter. Weather in September »
Weather in October
October marks the rapid transition from warm to cool as Autumn takes hold in Roy. Leaf-peepers can enjoy the vibrant colors of changing foliage, outstanding against the backdrop of increasingly chilly days. Though October holds onto mild, shorter days, the brisk nights warn of winter's impending arrival. Weather in October »
Weather in November
The cool temperatures of November bring the city of Roy into a wintry embrace. Substantial temperature drops occur as the average low plunges to 32.2°F (0.1°C), a stark contrast to previous months. The decrease in daytime hours reflects a grayer yet starker beauty, underlined by the return of snow, albeit minimal. Weather in November »
Weather in December
In December, winter inevitably sets in, marking its arrival with a renewed flurry of snow. The average high temperature declines to 34°F (1.1°C), while snowfall increases to 4.37" (111mm), second only to January's peak. The city lights up with holiday decorations, providing a dazzling contrast to the snow-dusted landscapes. Weather in December »
Updated: Aug 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month?
January is the coldest month in Roy, Utah, exhibiting average temperatures of 33.4°F (0.8°C) at the peak and 21.6°F (-5.8°C) at the base.
What is the most humid month?
The most humid month is January, with an average relative humidity of 83%.
How many days does it rain?
In Roy, during the entire year, the rain falls for 91.6 days and collects up to 11.06" (281mm) of precipitation.
When does it snow?
January through May, September through December are months with snowfall.
What is the snowiest month?
The month with the most snowfall is January, when snow falls for 8.8 days and typically aggregates up to 6.89" (175mm) of snow.
How many days does it snow?
Throughout the year, there are 37.8 snowfall days, and 24.76" (629mm) of snow is accumulated.
What is the month with the least sunshine in Roy?
With an average of 5.6h of sunshine, January has the least sunshine of the year.
What is the month with the lowest UV index?
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from MST to MDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from MDT to MST.
What is the wettest month?
April is the month with the most rainfall. Rain falls for 12.2 days and accumulates 1.26" (32mm) of precipitation.
When it does not snow?
June through August are months without snowfall in Roy.
When are the longest days?
With an average of 15h and 6min of daylight, June has the longest days of the year.
What is the month with the most sunshine?
The months with the most sunshine are June through August, with an average of 11.9h of sunshine.
When is the highest UV index in Roy?
The months with the highest UV index are June through August, with an average maximum UV index of 6.
What part of the year is the hottest?
With average temperatures fluctuating between a high of 83.8°F (28.8°C) and a low of 60.4°F (15.8°C), July stands out as the warmest month.
What is the least humid month?
The least humid month is July, with an average relative humidity of 37%.
What is the driest month?
The month with the least rainfall is July, when the rain falls for 6.3 days and typically collects 0.43" (11mm) of precipitation.
What is the month with the shortest days?
With an average of 9h and 18min of daylight, December has the shortest days of the year.
Average temperature
Roy, UT
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (33.4°F).
The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure
Roy, UT
- Average pressure in January:
30.29"Hg - Average pressure in February:
30.14"Hg - Average pressure in March:
30.04"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.9"Hg - Average pressure in June:
29.88"Hg
- Average pressure in July:
29.91"Hg - Average pressure in August:
29.92"Hg - Average pressure in September:
29.95"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.13"Hg - Average pressure in December:
30.23"Hg
The month with the highest atmospheric pressure is January (30.29"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed
Roy, UT
- Average wind speed in January:
4.8mph - Average wind speed in February:
6mph - Average wind speed in March:
6.4mph - Average wind speed in April:
6.5mph - Average wind speed in May:
5.7mph - Average wind speed in June:
6.1mph
- Average wind speed in July:
6mph - Average wind speed in August:
6.2mph - Average wind speed in September:
5.8mph - Average wind speed in October:
5.6mph - Average wind speed in November:
5.9mph - Average wind speed in December:
5.5mph
The windiest month (with the highest average wind speed) is April (6.5mph).
The calmest month (with the lowest average wind speed) is January (4.8mph).
Average humidity
Roy, UT
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is July (37%).
Average rainfall
Roy, UT
- Average rainfall in January:
1.14" - Average rainfall in February:
1.14" - Average rainfall in March:
1.02" - Average rainfall in April:
1.26" - Average rainfall in May:
1.14" - Average rainfall in June:
0.79"
- Average rainfall in July:
0.43" - Average rainfall in August:
0.47" - Average rainfall in September:
0.98" - Average rainfall in October:
0.83" - Average rainfall in November:
0.83" - Average rainfall in December:
1.02"
The wettest month (with the highest rainfall) is April (1.26").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days
Roy, UT
- Average rainfall days in January:
4.6 days - Average rainfall days in February:
6.7 days - Average rainfall days in March:
10.3 days - Average rainfall days in April:
12.2 days - Average rainfall days in May:
12.5 days - Average rainfall days in June:
6.8 days
- Average rainfall days in July:
6.3 days - Average rainfall days in August:
6.3 days - Average rainfall days in September:
7.5 days - Average rainfall days in October:
7.5 days - Average rainfall days in November:
5.4 days - Average rainfall days in December:
5.5 days
The month with the highest number of rainy days is May (12.5 days).
The month with the least rainy days is January (4.6 days).
Average snowfall
Roy, UT
- Average snowfall in January:
6.89" - Average snowfall in February:
5.43" - Average snowfall in March:
3.15" - Average snowfall in April:
1.22" - Average snowfall in May:
0.31" - Average snowfall in June:
0"
The month with the highest snowfall is January (6.89").
The months with the least snowfall are June, July and August (0").
Average snowfall days
Roy, UT
- Average snowfall days in January:
8.8 days - Average snowfall days in February:
7.5 days - Average snowfall days in March:
5.1 days - Average snowfall days in April:
2.8 days - Average snowfall days in May:
0.3 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0.2 days - Average snowfall days in October:
1 days - Average snowfall days in November:
3.9 days - Average snowfall days in December:
8.2 days
The month with the highest number of snowfall days is January (8.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight / Average sunshine
Roy, UT
- Average daylight in January:
9h and 4min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 3min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January:
5h and 4min - Average sunshine in February:
6h and 5min - Average sunshine in March:
8h and 3min - Average sunshine in April:
10h and 1min - Average sunshine in May:
11h and 1min - Average sunshine in June:
11h and 5min
- Average sunshine in July:
11h and 5min - Average sunshine in August:
11h and 5min - Average sunshine in September:
9h and 5min - Average sunshine in October:
7h and 4min - Average sunshine in November:
6h and 5min - Average sunshine in December:
6h and 0min
The months with the most sunshine are June, July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 36min).
Average sunshine days
Roy, UT
- Average sunshine days in January:
19.5 days - Average sunshine days in February:
15.8 days - Average sunshine days in March:
17.2 days - Average sunshine days in April:
14.7 days - Average sunshine days in May:
14.8 days - Average sunshine days in June:
20.4 days
- Average sunshine days in July:
19.9 days - Average sunshine days in August:
18.2 days - Average sunshine days in September:
18.8 days - Average sunshine days in October:
21.6 days - Average sunshine days in November:
21.6 days - Average sunshine days in December:
19.9 days
The months with the most sunshine days are October and November (21.6 days).
The month with the least sunshine days is April (14.7 days).
Average UV index
Roy, UT
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Roy, UT
The months with the most cloud cover are January and February (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 10).
Average visibility
Roy, UT
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Roy, Utah, USA
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