May weather forecastGreybull, WY
May
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. Humidity dips compared to the soaked April, and citizens enjoy plenty of sunshine. The longer daylight hours coupled with temperate conditions foster an enjoyable spring aura.Temperature
The transition from April to May brings a temperature rise, with average high-temperatures increasing from a fresh 54.1°F (12.3°C) to a refreshing 64.6°F (18.1°C). During the nights in May, Greybull experiences a consistent average temperature of 47.1°F (8.4°C).Humidity
The average relative humidity in May is 44%.Rainfall
May is the month with the most rainfall in Greybull, Wyoming. Rain falls for 12.6 days and accumulates 0.87" (22mm) of precipitation.Snowfall
Months with snowfall in Greybull are January through May, October through December. May is the last month it regularly snows. During 0.4 snowfall days, in May, Greybull aggregates 0.28" (7mm) of snow. Throughout the year, there are 41.4 snowfall days, and 9.41" (239mm) of snow is accumulated.Daylight
The average length of the day in May is 14h and 49min.On the first day of the month, sunrise is at 6:01 am and sunset at 8:17 pm. On the last day of May, in Greybull, sunrise is at 5:30 am and sunset at 8:49 pm MDT.
Sunshine
In May, the average sunshine in Greybull, Wyoming, is 11.4h.UV index
In May, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: An average maximum UV index of 5 in May leads to these recommendations:
Heed the precautions - Suggestions to avoid sunburn are made. To protect against the Sun's most potent rays, avoid direct exposure around midday. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Greybull, WY
- Average high temperature in May: 64.6°F
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).
- Average low temperature in May: 47.1°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 in May
Greybull, WY
- Average pressure in May: 29.92"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 in May
Greybull, WY
- Average wind speed in May: 7.8mph
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 in May
Greybull, WY
- Average humidity in May: 44%
The month with the highest relative humidity is January (78%).
The months with the lowest relative humidity are July and August (33%).
Average rainfall in May
Greybull, WY
- Average rainfall in May: 0.87"
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 in May
Greybull, WY
- Average rainfall days in May: 12.6 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 in May
Greybull, WY
- Average snowfall in May: 0.28"
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 in May
Greybull, WY
- Average snowfall days in May: 0.4 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 in May /
Average sunshine in May
Greybull, WY
- Average daylight in May: 14h and 48min
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 May: 11h and 24min
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 in May
Greybull, WY
- Average sunshine days in May: 12.6 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 in May
Greybull, WY
- Average UV index in May: 5
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 in May
Greybull, WY
- Average cloud cover in May: 22
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 in May
Greybull, WY
- Average visibility in May: 6mi
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).
