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Contents
- The climate of Jerome
- The Best Time to Visit Jerome
- The Worst Time to Visit Jerome
- Spring Weather in Jerome
- Summer Weather in Jerome
- Autumn Weather in Jerome
- Winter Weather in Jerome
- 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 high rocks around the Snake River near the iconic Shoshone Falls in Jerome County, Idaho
The climate of Jerome
Jerome, Idaho, USA, basks in a BSk - Mid-latitude Steppe, according to the Köppen Climate Classification. This dominating climate manifests in dry, hot summers and cold winters in Jerome, lying close to the 42nd parallel north.
Temperatures fluctuate over the year, ranging from a gentle 22.5°F (-5.3°C) in January to a scorching 89.6°F (32°C) in July. On average, summer months between June to August register high temperatures hovering from 77.9°F (25.5°C) to 89.6°F (32°C). In stark contrast, winter flips the coin as temperatures plunge to a chilling range of 22.5°F (-5.3°C) to 32.9°F (0.5°C) between December to February.
Relative humidity follows a downward progression as the year advances from January to July, decreasing from 80% to 29%, before gradually climbing back up to 79% in December. Noteworthy rainfall trends in Jerome show that the city experiences the highest rainfall in January, 1.26" (32mm), and December, 1.3" (33mm). Exceptionally dry spells occur in the heart of summer, between June to August, with minimal rainfall capacities of 0.16" (4mm) to 0.39" (10mm).
Temperatures fluctuate over the year, ranging from a gentle 22.5°F (-5.3°C) in January to a scorching 89.6°F (32°C) in July. On average, summer months between June to August register high temperatures hovering from 77.9°F (25.5°C) to 89.6°F (32°C). In stark contrast, winter flips the coin as temperatures plunge to a chilling range of 22.5°F (-5.3°C) to 32.9°F (0.5°C) between December to February.
Relative humidity follows a downward progression as the year advances from January to July, decreasing from 80% to 29%, before gradually climbing back up to 79% in December. Noteworthy rainfall trends in Jerome show that the city experiences the highest rainfall in January, 1.26" (32mm), and December, 1.3" (33mm). Exceptionally dry spells occur in the heart of summer, between June to August, with minimal rainfall capacities of 0.16" (4mm) to 0.39" (10mm).
The Best Time to Visit Jerome
Tourists seeking to bask in warm, dry weather should mark their calendars for July. This month witnesses the pinnacle of heat with temperatures averaging at a high 89.6°F (32°C) and a low of 60.8°F (16°C). Coinciding with this is the lowest rainfall in the year, a mere 0.16" (4mm), making it an ideal time for outdoor exploration.
The Worst Time to Visit Jerome
Travelers are advised against venturing to Jerome during the winter months of December to February. This icy season sees temperatures plummeting to lows of 21.9°F (-5.6°C) to 22.5°F (-5.3°C), alongside high snowfall rates, peaking in December with 6.14" (156mm). Consequently, this period is marked by limited outdoor activity.
Spring Weather in Jerome
As Jerome transitions from winter to spring between March to May, temperatures gradually rise from 33.3°F (0.7°C) to 67.1°F (19.5°C). Concurrently, the city experiences diminishing rainfall and snowfall - notably dropping from 6.14" (156mm) in December to zero in May. This period also marks the increase in daylight hours from 12 to 14.7 hours per day.
Summer Weather in Jerome
Summer in Jerome radiates blistering heat between June to August, with temperatures peaking at 89.6°F (32°C) in July. Relative humidity is at its lowest during this period, dwindling down to 29%. Great opportunities for outdoor activities abound as the city basks in maximum daylight reaching 15.3 hours in June.
Autumn Weather in Jerome
Autumn paints changes on Jerome's climate canvas from September through November. Temperatures start to dip gently from 77.2°F (25.1°C) in September to a nippy 45.9°F (7.7°C) in November. Coincident with this, daylight hours gradually reduce from 12.5 hours in September to 9.8 hours in November. Although the rainy spell returns around this time, Jerome only records mild rainfall amounts, peaking to 0.75" (19mm) in November.
Winter Weather in Jerome
Winter casts a deep freeze over Jerome from December to February with biting lows of 21.9°F (-5.6°C) to 22.5°F (-5.3°C). Snowfall rates surge to a 6.14-inch high in December. The city is also wrapped in winter's short days, with daylight hours dwindling to their year-round least of 9.1 hours. Consequently, outdoor activities are limited during this frigid season.
Weather in January
The weather in Jerome, Idaho, ushers in the year with chilly temperatures and significant snowfall. Compared to the milder conditions of December, January features a drop in maximum temperatures to 33.3°F (0.7°C) and a plunge in the minimum to 22.5°F (-5.3°C). Weather in January »
Weather in February
February’s weather tends to present an easing into spring conditions, with eventual showers rather than January’s snowy episodes. The weather shifts from lower temperatures and high snowfall in January, to a slight increase in temperature, along with a reduction of both snowfall to 5.08" (129mm) and snow days to 8.3. Weather in February »
Weather in March
In Jerome, Idaho, March brings significant shifts in weather patterns, indicating the arrival of spring. Transitional weather often involves periods of frost, especially in the mornings, before eventually warming up during the day. Weather in March »
Weather in April
April’s weather in Jerome, Idaho, is characterized by warmer temperatures and further dwindling snowfall. The shift from March’s occasionally chilly conditions to April's mild temperatures spells out clear signs of spring. The presence of snowfall reduces to a minimum of 0.67" (17mm) occurring within two days max. Weather in April »
Weather in May
May introduces the first hints of summer in Jerome, Idaho, with a more significant rise in temperature. The weather transitions from April’s scattered frosts and minimal snowfall to being entirely free of snow in May, signaling the beginning of summer. Weather in May »
Weather in June
June in Jerome, Idaho, officially marks the beginning of summer, offering long, sunny days and mild nights. The transition from May’s modest temperatures results in a notable rise, with sunny days dominating the month. In June, rainfall averages at a mere 0.39" (10mm), demonstrating a major decrease from prior months. Weather in June »
Weather in July
July beats every other month in terms of heat in Jerome, Idaho. The shift in weather patterns from June to July results in the highest temperatures of the year, hitting a peak of 89.6°F (32°C). Residents take advantage of the peak summer weather for beach trips, picnics, and other outdoor activities. Weather in July »
Weather in August
August in Jerome, Idaho, sees a slight reprieve from July's peak summer temperatures, signaling the beginning of the end of summer. Traditionally, the weather transitions from July's heatwave to more manageable temperatures in August. Weather in August »
Weather in September
September brings about a noticeable change in weather in Jerome, Idaho, with temperatures cooling down from the height of summer in August. The shift in weather ushers in autumn, characterized by shorter daylight hours and cooler temperatures. Weather in September »
Weather in October
October brings crisp autumn weather to Jerome, Idaho. October's weather signifies a clear shift from the dwindling heat of September to clear autumn conditions. Temperatures begin to drop significantly, setting the stage for November's winter onset. Weather in October »
Weather in November
In November, the weather in Jerome, Idaho, makes a clear transition towards winter. The shift from October’s late-autumn conditions to November's wintery chill brings the temperature average further down. November welcomes back snowfall, at an average of 2.2" (56mm) over almost five days. Weather in November »
Weather in December
December, the final month of the year, brings true winter conditions to Jerome, Idaho. The shift from November’s milder winter weather to December's biting cold is marked by a drop in temperatures. December has a significant snowfall of 6.14" (156mm) over almost 11 days, painting a typical winter landscape. Weather in December »
Updated: Jun 10, 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 most humid month?
The most humid month is January, with an average relative humidity of 80%.
How much does it rain?
Throughout the year, in Jerome, there are 86.9 rainfall days, and 8.98" (228mm) of precipitation is accumulated.
When does it snow?
Months with snowfall are January through April, October through December.
What is the snowiest month?
The month with the most snowfall is January, when snow falls for 10.8 days and typically aggregates up to 7.44" (189mm) of snow.
How many days does it snow?
In Jerome, during the entire year, snow falls for 42 days and aggregates up to 23.35" (593mm) of snow.
When is 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.
When it does not snow?
May through September are months without snowfall.
When are the longest days?
With an average of 15h and 18min of daylight, June has the longest days of the year.
What month is the hottest?
Jerome's temperature records reveal July as the warmest month, marked by average highs of 89.6°F (32°C) and lows of 60.8°F (16°C).
What is the least humid month?
July and August, with an average relative humidity of 29%, are the least humid months in Jerome.
What is the driest month?
July is the month with the least rainfall. Rain falls for 3.3 days and accumulates 0.16" (4mm) of precipitation.
What month has the most sunshine in Jerome?
July has the most sunshine of the year, with an average of 12h of sunshine.
What is the month with the highest UV index?
With an average maximum UV index of 7, July is the month with the highest UV index.
What time of the year is the coldest?
December is the coldest month in Jerome, with the temperature often reaching an average high of 32.9°F (0.5°C) and an average low of 21.9°F (-5.6°C).
What is the rainiest month?
The month with the most rainfall is December, when the rain falls for 7.4 days and typically aggregates up to 1.3" (33mm) of precipitation.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 6min of daylight.
What is the month with the least sunshine?
The month with the least sunshine is December, with an average of 5.7h of sunshine.
Average temperature
Jerome, ID
The warmest month (with the highest average high temperature) is July (89.6°F).
The month with the lowest average high temperature is December (32.9°F).
The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is December (21.9°F).
Average pressure
Jerome, ID
- Average pressure in January:
30.28"Hg - Average pressure in February:
30.14"Hg - Average pressure in March:
30.04"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.89"Hg - Average pressure in June:
29.87"Hg
- Average pressure in July:
29.88"Hg - Average pressure in August:
29.89"Hg - Average pressure in September:
29.93"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.14"Hg - Average pressure in December:
30.24"Hg
The month with the highest atmospheric pressure is January (30.28"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed
Jerome, ID
- Average wind speed in January:
7.3mph - Average wind speed in February:
8.3mph - Average wind speed in March:
8.6mph - Average wind speed in April:
9.5mph - Average wind speed in May:
8.3mph - Average wind speed in June:
8.4mph
- Average wind speed in July:
7.4mph - Average wind speed in August:
7mph - Average wind speed in September:
7.1mph - Average wind speed in October:
7.5mph - Average wind speed in November:
7.7mph - Average wind speed in December:
7.5mph
The windiest month (with the highest average wind speed) is April (9.5mph).
The calmest month (with the lowest average wind speed) is August (7mph).
Average humidity
Jerome, ID
The month with the highest relative humidity is January (80%).
The months with the lowest relative humidity are July and August (29%).
Average rainfall
Jerome, ID
- Average rainfall in January:
1.26" - Average rainfall in February:
1.22" - Average rainfall in March:
1.1" - Average rainfall in April:
0.75" - Average rainfall in May:
0.83" - Average rainfall in June:
0.39"
- Average rainfall in July:
0.16" - Average rainfall in August:
0.28" - Average rainfall in September:
0.31" - Average rainfall in October:
0.63" - Average rainfall in November:
0.75" - Average rainfall in December:
1.3"
The wettest month (with the highest rainfall) is December (1.3").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days
Jerome, ID
- Average rainfall days in January:
6.1 days - Average rainfall days in February:
8.1 days - Average rainfall days in March:
11.3 days - Average rainfall days in April:
10.3 days - Average rainfall days in May:
10.2 days - Average rainfall days in June:
6 days
- Average rainfall days in July:
3.3 days - Average rainfall days in August:
4.8 days - Average rainfall days in September:
5.9 days - Average rainfall days in October:
6.4 days - Average rainfall days in November:
7.1 days - Average rainfall days in December:
7.4 days
The month with the highest number of rainy days is March (11.3 days).
The month with the least rainy days is July (3.3 days).
Average snowfall
Jerome, ID
The month with the highest snowfall is January (7.44").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Jerome, ID
- Average snowfall days in January:
10.8 days - Average snowfall days in February:
8.3 days - Average snowfall days in March:
4.2 days - Average snowfall days in April:
2 days - Average snowfall days in May:
0.2 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 days - Average snowfall days in October:
1 days - Average snowfall days in November:
4.7 days - Average snowfall days in December:
10.8 days
The months with the highest number of snowfall days are January and December (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Jerome, ID
- Average daylight in January:
9h and 3min - 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 4min - Average daylight in June:
15h and 2min
- Average daylight in July:
15h and 0min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 1min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in January:
5h and 5min - Average sunshine in February:
7h and 3min - Average sunshine in March:
8h and 2min - Average sunshine in April:
9h and 5min - Average sunshine in May:
11h and 1min - Average sunshine in June:
11h and 5min
- Average sunshine in July:
12h and 0min - Average sunshine in August:
11h and 4min - Average sunshine in September:
9h and 4min - Average sunshine in October:
7h and 5min - Average sunshine in November:
6h and 4min - Average sunshine in December:
5h and 4min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days
Jerome, ID
- Average sunshine days in January:
17.7 days - Average sunshine days in February:
15.5 days - Average sunshine days in March:
15.2 days - Average sunshine days in April:
16.3 days - Average sunshine days in May:
17.8 days - Average sunshine days in June:
22.1 days
- Average sunshine days in July:
25.2 days - Average sunshine days in August:
23 days - Average sunshine days in September:
22.3 days - Average sunshine days in October:
22.1 days - Average sunshine days in November:
19.6 days - Average sunshine days in December:
17.3 days
The month with the most sunshine days is July (25.2 days).
The month with the least sunshine days is March (15.2 days).
Average UV index
Jerome, ID
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Jerome, ID
The month with the most cloud cover is December (Cloud cover 39).
The months with the least cloud cover are July and August (Cloud cover 9).
Average visibility
Jerome, ID
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Jerome, Idaho, USA
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