Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
The shift from April to May sees an increase in the average high-temperature, transitioning from a chilly 44.1°F (6.7°C) to a fresh 54.1°F (12.3°C). During May, the nighttime temperature in Grass Creek averages to an icy 36.7°F (2.6°C).Humidity
In Grass Creek, the average relative humidity in May is 62%.Rainfall
May is the month with the most rainfall. Rain falls for 16.9 days and accumulates 2.48" (63mm) of precipitation.Snowfall
Months with snowfall are January through June, September through December. In Grass Creek, during May, snow falls for 4.7 days and regularly aggregates up to 5.35" (136mm) of snow. Throughout the year, there are 55.8 snowfall days, and 30.31" (770mm) of snow is accumulated.Daylight
In May, the average length of the day is 14h and 46min.On the first day of May in Grass Creek, sunrise is at 6:04 am and sunset at 8:18 pm. On the last day of the month, sunrise is at 5:34 am and sunset at 8:49 pm MDT.
Sunshine
In Grass Creek, the average sunshine in May is 10.2h.UV index
In May, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: A typical high UV index of 4 in May suggests the following recommendations:
Be vigilant - Preventing sunburn is recommended. To guard against the harmful effects of the Sun, minimize exposure during midday. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average May temperature?
What is the average humidity in May?
What is the wettest month in Grass Creek?
How much does it rain in May?
How many days does it snow in May?
What is the average length of the day in May?
When are sunrise and sunset in May?
How long on average sun shines in May?
How high is the UV index in May?
Average temperature in May
Grass Creek, WY
- Average high temperature in May: 54.1°F
The warmest month (with the highest average high temperature) is July (76.1°F).
The month with the lowest average high temperature is December (27.3°F).
- Average low temperature in May: 36.7°F
The month with the highest average low temperature is July (53.8°F).
The coldest month (with the lowest average low temperature) is December (11.8°F).
Average pressure in May
Grass Creek, WY
- Average pressure in May: 29.93"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in May
Grass Creek, WY
- Average wind speed in May: 6.5mph
The windiest month (with the highest average wind speed) is January (7.9mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in May
Grass Creek, WY
- Average humidity in May: 62%
The month with the highest relative humidity is February (77%).
The month with the lowest relative humidity is July (43%).
Average rainfall in May
Grass Creek, WY
- Average rainfall in May: 2.48"
The wettest month (with the highest rainfall) is May (2.48").
The driest month (with the least rainfall) is January (0.2").
Average rainfall days in May
Grass Creek, WY
- Average rainfall days in May: 16.9 days
The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is January (1.6 days).
Average snowfall in May
Grass Creek, WY
- Average snowfall in May: 5.35"
The month with the highest snowfall is April (6.3").
The months with the least snowfall are July and August (0").
Average snowfall days in May
Grass Creek, WY
- Average snowfall days in May: 4.7 days
The month with the highest number of snowfall days is April (9.4 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in May /
Average sunshine in May
Grass Creek, WY
- Average daylight in May: 14h and 5min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in May: 10h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 6h and 24min).
Average sunshine days in May
Grass Creek, WY
- Average sunshine days in May: 10.2 days
The month with the most sunshine days is January (25 days).
The month with the least sunshine days is May (10.2 days).
Average UV index in May
Grass Creek, WY
- Average UV index in May: 4
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in May
Grass Creek, WY
- Average cloud cover in May: 33
The month with the most cloud cover is April (Cloud cover 35).
The months with the least cloud cover are July and September (Cloud cover 17).
Average visibility in May
Grass Creek, 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).
Grass Creek, Wyoming, USA
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