May weather forecastMammoth, WY
May
Weather in May
The last month of the spring, May, is a chilly month in Mammoth, Wyoming, with temperature in the range of an average low of 28.9°F (-1.7°C) and an average high of 49.8°F (9.9°C).Temperature
In May, the average high-temperature increases from an icy 37.2°F (2.9°C) in April to a chilly 49.8°F (9.9°C). During May, Mammoth consistently records a temperature low averaging a subzero cold 28.9°F (-1.7°C).Humidity
In Mammoth, the average relative humidity in May is 76%.Rainfall
May is the month with the most rainfall. Rain falls for 17.4 days and accumulates 2.8" (71mm) of precipitation.Snowfall
Months with snowfall are January through July, September through December. In Mammoth, in May, snow falls for 10.3 days, with typically accumulated 8.23" (209mm) of snow. In Mammoth, Wyoming, during the entire year, snow falls for 159.3 days and aggregates up to 120.47" (3060mm) of snow.Daylight
The average length of the day in May in Mammoth is 14h and 52min.On the first day of May, sunrise is at 6:10 am and sunset at 8:28 pm. On the last day of the month, sunrise is at 5:39 am and sunset at 9:01 pm MDT.
Sunshine
In May, the average sunshine in Mammoth is 9.6h.UV index
In Mammoth, the average daily maximum UV index in May is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum UV index of 3 during May translates into these guidelines:
Guard yourself - Avoiding sunburn is suggested. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Mammoth, WY
- Average high temperature in May: 49.8°F
The warmest month (with the highest average high temperature) is July (72.9°F).
The month with the lowest average high temperature is December (20.1°F).
- Average low temperature in May: 28.9°F
The month with the highest average low temperature is August (43.7°F).
The coldest month (with the lowest average low temperature) is December (4.8°F).
Average pressure in May
Mammoth, WY
- Average pressure in May: 29.94"Hg
The month with the highest atmospheric pressure is January (30.24"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in May
Mammoth, WY
- Average wind speed in May: 6mph
The windiest month (with the highest average wind speed) is June (6.8mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).
Average humidity in May
Mammoth, WY
- Average humidity in May: 76%
The month with the highest relative humidity is February (95%).
The month with the lowest relative humidity is August (50%).
Average rainfall in May
Mammoth, WY
- Average rainfall in May: 2.8"
The wettest month (with the highest rainfall) is May (2.8").
The driest month (with the least rainfall) is July (0.91").
Average rainfall days in May
Mammoth, WY
- Average rainfall days in May: 17.4 days
The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is January (2.2 days).
Average snowfall in May
Mammoth, WY
- Average snowfall in May: 8.23"
The month with the highest snowfall is February (17.83").
The month with the least snowfall is August (0").
Average snowfall days in May
Mammoth, WY
- Average snowfall days in May: 10.3 days
The month with the highest number of snowfall days is March (24.4 days).
The months with the least snowfall days are July and August (0.2 days).
Average daylight in May /
Average sunshine in May
Mammoth, WY
- Average daylight in May: 14h and 54min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in May: 9h and 36min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The months with the least sunshine are January, February and December (Average sunshine: 3h and 18min).
Average sunshine days in May
Mammoth, WY
- Average sunshine days in May: 5.5 days
The months with the most sunshine days are July and September (14.7 days).
The month with the least sunshine days is February (5.3 days).
Average UV index in May
Mammoth, WY
- Average UV index in May: 3
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 1).
Average cloud cover in May
Mammoth, WY
- Average cloud cover in May: 39
The month with the most cloud cover is February (Cloud cover 76).
The month with the least cloud cover is July (Cloud cover 16).
Average visibility in May
Mammoth, WY
- Average visibility in May: 5mi
The months with the highest visibility are June, July, August and September (6mi).
The months with the lowest visibility are January, February, March and December (3mi).
