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Contents
- The climate of Greybull
- The best time to visit Greybull
- The worst time to visit Greybull
- Spring weather in Greybull
- Summer weather in Greybull
- Autumn weather in Greybull
- Winter weather in Greybull
- 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 Greybull
The town of Greybull, nestled in the vibrant state of Wyoming, USA, experiences a Mid-latitude desert, according to the Köppen climate classification - BWk. Being profoundly positioned towards the interior of the country, it records a substantial divergence between high and low temperatures throughout the year. The town experiences a substantial annual temperature shift, with maximum temperatures reaching up to 85.1°F (29.5°C) in July while plunging to a chilling low of 13.8°F (-10.1°C) in January.
The precipitation pattern in Greybull interestingly displays seasonal variations too. Rainfall normally ranges between 0.2" (5mm) witnessed in December and 0.87" (22mm) observed in May. Concurrently, the number of rainy days varies moderately from around 6.5 in December to a high of 12.6 during May. An intriguing aspect of the climate here is the potential for snowfall, which the town witnesses through January and February, with snowfall almost absent from May to September.
Humidity is another significant meteorological factor, experiencing a yearly fluctuation with the highest relative humidity of 78% in January and reducing down to a comfortable 33% during July and August. Despite this, cloud cover remains relatively stable throughout the year, averaging around 27%. Wind speeds aren't usually high, just averaging around 6mph (9.7km/h) to 8.3mph (13.4km/h), with the maximum gust speeds observed to be 12.2mph (19.6km/h) in December.
The precipitation pattern in Greybull interestingly displays seasonal variations too. Rainfall normally ranges between 0.2" (5mm) witnessed in December and 0.87" (22mm) observed in May. Concurrently, the number of rainy days varies moderately from around 6.5 in December to a high of 12.6 during May. An intriguing aspect of the climate here is the potential for snowfall, which the town witnesses through January and February, with snowfall almost absent from May to September.
Humidity is another significant meteorological factor, experiencing a yearly fluctuation with the highest relative humidity of 78% in January and reducing down to a comfortable 33% during July and August. Despite this, cloud cover remains relatively stable throughout the year, averaging around 27%. Wind speeds aren't usually high, just averaging around 6mph (9.7km/h) to 8.3mph (13.4km/h), with the maximum gust speeds observed to be 12.2mph (19.6km/h) in December.
The best time to visit Greybull
Taking into account temperatures, humidity, and precipitation, arguably the best period to explore Greybull would be from May to August. Over this period, the town experiences a relatively comfortable temperature range, with daily highs progressively ascending from 64.6°F (18.1°C) in May to a warm 85.1°F (29.5°C) in July, before starting to decline. The nice weather is typically accompanied by low, manageable humidity levels, with an average relative humidity of 33% to 44% during these months.
The worst time to visit Greybull
On the other hand, the period from December to February might be less ideal for a visit owing to harsh weather conditions. The town experiences its coldest months, with the lowest temperatures plummeting to 13.8°F (-10.1°C) in January. Alongside the extremely low temperatures, these months are accompanied by the highest snowfall, measuring 1.85" (47mm) and 2.52" (64mm) in January and February respectively, making travel potentially challenging.
Spring weather in Greybull
Greybull's transition from winter to summer between March and May presents an easing meteorological picture. The average daily highest temperature gradually increases from 44.4°F (6.9°C) in March to 64.6°F (18.1°C) in May. During this period, the town also experiences an increase in rainfall from 0.31" (8mm) in March to 0.87" (22mm) in May.
Summer weather in Greybull
Spanning from June to August, summer in Greybull is typically characterized by warm temperatures and moderate rainfall. The average daily highs can reach up to 85.1°F (29.5°C) in July, with August being slightly cooler at 82.6°F (28.1°C). Average rainfall during this period reduces, stabilizing at around 0.47" (12mm) in both July and August.
Autumn weather in Greybull
In Autumn, from September to November, the town experiences declining temperatures, slipping from 73.2°F (22.9°C) in September down to 41°F (5°C) in November. Concurrently, there is a further decrease in rainfall, waning from 0.71" (18mm) in September to 0.28" (7mm) in November.
Winter weather in Greybull
Greybull’s winter, which lasts from December to February, ushers in the coldest weather of the year. Average daily high temperatures hover around 29.7°F (-1.3°C) in December and 30.2°F (-1°C) in February, whilst the daily low temperatures can even plunge to 13.8°F (-10.1°C) in January. This season also marks the highest snowfall, reaching 1.85" (47mm) in January. Despite the biting cold, Greybull on a bright winter day with a fresh snow blanket has the potential to offer a picturesque spectacle.
Weather in January
January in Greybull, Wyoming, exhibits a wintry character, with the chilliest temperatures of the year. There is a wide gap in the high and low temperatures ranging from 13.8°F (-10.1°C) to 29.7°F (-1.3°C). The month has relatively high humidity coupled with the city being sheathed in a foggy, frosty shroud. Weather in January »
Weather in February
The shortest month of the year brings a slight reprieve from cold temperatures in Greybull. Despite its frigid reputation, snowfall takes a back seat with lower measurements than January. In marked contrast to January, sunshine hours accumulate impressively as daylight slowly lengthens. Weather in February »
Weather in March
The arrival of March brings obvious changes in the weather pattern of Greybull. Gone are the intense cold spells and in comes a warmer 44.4°F (6.9°C) high. Snowy patches begin to diminish as rain starts to fall more regularly, signalling the transition from winter to spring. Weather in March »
Weather in April
Greybull greets April with an upbeat weather pattern showing clear signs of spring. The temperature variation between 36.7°F (2.6°C) and 54.1°F (12.3°C) is indication of spring taking hold. The amount of sunshine increases markedly and contributes to the melting of any remaining snow patches. Weather in April »
Weather in May
May marks the definitive arrival of spring in Greybull. The motivational change in the weather is marked by the spectacle of blooming flowers thriving under 64.6°F (18.1°C) high temperatures. The city experiences a peak in rainfall, with a drop in snowfall to a comfortable minimum. Weather in May »
Weather in June
June propels Greybull into the initial stages of summer with a delightful admission of warmth reaching 76.5°F (24.7°C) high. Markedly reduced precipitation allows for an explosion of outdoor activities and events. The city basks in the glory of the sun, with daylight and sunshine hours peaking. Weather in June »
Weather in July
July in Greybull is marked by peak summer conditions, with a scorching high of 85.1°F (29.5°C). Patterns of rainfall and snowfall are at their lowest, making each day sunny and dry. Wind conditions remain modest, doing little to alleviate the sharp heat. Weather in July »
Weather in August
August represents the maturity of summer in Greybull. It sustains the high warm temperatures from July, albeit a slight drop to 82.6°F (28.1°C). The shell of radiant sunshine and dry conditions persists, favoring a plethora of summer activities. Weather in August »
Weather in September
September signifies the arrival of Autumn in Greybull, Wyoming. The high temperature recedes to a more moderate 73.2°F (22.9°C). A perceptible dip in the amount of daylight gradually ushers in shorter days and longer nights. The lush greenery starts turning into a vibrant mix of orange, yellow, and brown hues. Weather in September »
Weather in October
October brings the full-fledged arrival of Autumn in Greybull. From the mild daytime temperatures to the cool nights, October is typified by a classic fall climate. The trees, now ablaze with the colors of fall, contrast sharply with the clear blue autumn skies. Weather in October »
Weather in November
November in Greybull bids farewell to fall and introduces the first inklings of winter. A peak drop in temperature down to a 41°F (5°C) high reinforces November's reputation as a transitional month. Much of the late fall foliage has fallen, leaving behind bare trees ready to withstand the harsh winter. Weather in November »
Weather in December
With the arrival of December, Greybull welcomes winter in full accord. This is manifested in a plummet in temperature, reaching a low of 14.2°F (-9.9°C). Snowfall makes its return and precipitation reduces considerably. The city is now prepared for the festive season with delightful snow-clad frames adorning the landscape. Weather in December »
Updated: Feb 14, 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 in Greybull?
The most humid month in Greybull is January, with an average relative humidity of 78%.
How many days does it rain in Greybull?
Throughout the year, in Greybull, Wyoming, there are 103.2 rainfall days, and 5.71" (145mm) of precipitation is accumulated.
When does it snow in Greybull?
Months with snowfall in Greybull are January through May, October through December.
How much does it snow in Greybull?
In Greybull, during the entire year, snow falls for 41.4 days and aggregates up to 9.41" (239mm) of snow.
What is the month with the least sunshine in Greybull?
January has the least sunshine of the year in Greybull, with an average of 6.7h of sunshine.
When is the lowest UV index in Greybull?
The months with the lowest UV index in Greybull, Wyoming, are January through March, November and December, with an average maximum UV index of 2.
What is the snowiest month in Greybull?
February is the month with the most snowfall in Greybull. Snow falls for 9.8 days and accumulates 2.52" (64mm) of snow.
When is Daylight Saving Time (DST) in Greybull?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Greybull, 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 in Greybull?
The month with the most rainfall in Greybull, Wyoming, is May, when the rain falls for 12.6 days and typically aggregates up to 0.87" (22mm) of precipitation.
When it does not snow in Greybull?
In Greybull, Wyoming, snow does not fall in June through September.
When are the longest days in Greybull?
The month with the longest days is June, with an average of 15h and 30min of daylight.
What are the months with the most sunshine in Greybull?
The months with the most sunshine are June through August, with an average of 11.9h of sunshine.
What is the month with the highest UV index in Greybull?
June through August, with an average maximum UV index of 6, are months with the highest UV index in Greybull.
What time of the year is the hottest in Greybull?
Greybull's temperatures tend to reach their peak averages in July, with a high of 85.1°F (29.5°C) and a low of 63.3°F (17.4°C).
What is the least humid month in Greybull?
The months with the lowest humidity in Greybull, Wyoming, are July and August, with an average relative humidity of 33%.
What month is the coldest in Greybull?
December, having an average high-temperature of 28.8°F (-1.8°C) and an average low-temperature of 14.2°F (-9.9°C), is the coldest month in Greybull.
What is the driest month in Greybull?
The month with the least rainfall in Greybull is December, when the rain falls for 6.5 days and typically collects 0.2" (5mm) of precipitation.
What is the month with the shortest days in Greybull?
December has the shortest days of the year in Greybull, Wyoming, with an average of 8h and 54min of daylight.
Average temperature
Greybull, WY
The warmest month (with the highest average high temperature) is July (85.1°F).
The month with the lowest average high temperature is December (28.8°F).
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (13.8°F).
Average pressure
Greybull, WY
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.92"Hg - Average pressure in June:
29.87"Hg
- Average pressure in July:
29.93"Hg - Average pressure in August:
29.93"Hg - Average pressure in September:
29.96"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.08"Hg - Average pressure in December:
30.15"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed
Greybull, WY
- Average wind speed in January:
6mph - Average wind speed in February:
6.4mph - Average wind speed in March:
7.5mph - Average wind speed in April:
8.3mph - Average wind speed in May:
7.8mph - Average wind speed in June:
7.2mph
- Average wind speed in July:
6.4mph - Average wind speed in August:
6mph - Average wind speed in September:
6.6mph - Average wind speed in October:
7mph - Average wind speed in November:
6.8mph - Average wind speed in December:
6.5mph
The windiest month (with the highest average wind speed) is April (8.3mph).
The calmest months (with the lowest average wind speed) are January and August (6mph).
Average humidity
Greybull, WY
The month with the highest relative humidity is January (78%).
The months with the lowest relative humidity are July and August (33%).
Average rainfall
Greybull, WY
- Average rainfall in January:
0.28" - Average rainfall in February:
0.39" - Average rainfall in March:
0.31" - Average rainfall in April:
0.63" - Average rainfall in May:
0.87" - Average rainfall in June:
0.67"
- Average rainfall in July:
0.47" - Average rainfall in August:
0.47" - Average rainfall in September:
0.71" - Average rainfall in October:
0.43" - Average rainfall in November:
0.28" - Average rainfall in December:
0.2"
The wettest month (with the highest rainfall) is May (0.87").
The driest month (with the least rainfall) is December (0.2").
Average rainfall days
Greybull, WY
- Average rainfall days in January:
7.9 days - Average rainfall days in February:
8.9 days - Average rainfall days in March:
9.3 days - Average rainfall days in April:
12 days - Average rainfall days in May:
12.6 days - Average rainfall days in June:
10 days
- Average rainfall days in July:
7.3 days - Average rainfall days in August:
7.8 days - Average rainfall days in September:
6.6 days - Average rainfall days in October:
7.4 days - Average rainfall days in November:
6.9 days - Average rainfall days in December:
6.5 days
The month with the highest number of rainy days is May (12.6 days).
The month with the least rainy days is December (6.5 days).
Average snowfall
Greybull, WY
- Average snowfall in January:
1.85" - Average snowfall in February:
2.52" - Average snowfall in March:
0.67" - Average snowfall in April:
1.22" - Average snowfall in May:
0.28" - Average snowfall in June:
0"
The month with the highest snowfall is February (2.52").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Greybull, WY
- Average snowfall days in January:
8.8 days - Average snowfall days in February:
9.8 days - Average snowfall days in March:
4.9 days - Average snowfall days in April:
3.1 days - Average snowfall days in May:
0.4 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:
0.1 days - Average snowfall days in October:
1.6 days - Average snowfall days in November:
5.2 days - Average snowfall days in December:
7.5 days
The month with the highest number of snowfall days is February (9.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight / Average sunshine
Greybull, WY
- Average daylight in January:
9h and 2min - Average daylight in February:
10h and 3min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 3min - Average daylight in May:
14h and 5min - Average daylight in June:
15h and 3min
- Average daylight in July:
15h and 1min - Average daylight in August:
14h and 0min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 4min - Average daylight in December:
8h and 5min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in January:
6h and 4min - Average sunshine in February:
6h and 5min - Average sunshine in March:
9h and 2min - Average sunshine in April:
11h and 1min - Average sunshine in May:
11h and 2min - 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:
10h and 5min - Average sunshine in October:
7h and 2min - Average sunshine in November:
7h and 1min - Average sunshine in December:
7h 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: 6h and 42min).
Average sunshine days
Greybull, WY
- Average sunshine days in January:
19.9 days - Average sunshine days in February:
15.4 days - Average sunshine days in March:
16.9 days - Average sunshine days in April:
12.5 days - Average sunshine days in May:
12.6 days - Average sunshine days in June:
12.5 days
- Average sunshine days in July:
15.9 days - Average sunshine days in August:
14.8 days - Average sunshine days in September:
18.5 days - Average sunshine days in October:
18.3 days - Average sunshine days in November:
18.8 days - Average sunshine days in December:
20.9 days
The month with the most sunshine days is December (20.9 days).
The months with the least sunshine days are April and June (12.5 days).
Average UV index
Greybull, WY
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, March, November and December (UV index 2).
Average cloud cover
Greybull, WY
The month with the most cloud cover is February (Cloud cover 28).
The months with the least cloud cover are July and August (Cloud cover 12).
Average visibility
Greybull, WY
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).
Greybull, Wyoming, USA
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