May weather forecastSun River, MT
May
Weather in May
May, the last month of the spring in Sun River, is a comfortable month, with an average temperature fluctuating between 41.9°F (5.5°C) and 62.2°F (16.8°C).Temperature
The arrival of May brings a change in Sun River's weather, with average high-temperatures moving from April's cool 51.4°F (10.8°C) to an enjoyable 62.2°F (16.8°C). Sun River's nighttime temperature in May falls to an average of 41.9°F (5.5°C).Humidity
In Sun River, Montana, the average relative humidity in May is 59%.Rainfall
In Sun River, in May, it is raining for 15.2 days, with typically 1.69" (43mm) of accumulated precipitation. Throughout the year, there are 112.8 rainfall days, and 12.95" (329mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall. May is the last month it regularly snows in Sun River. During 1.2 snowfall days, in May, Sun River aggregates 0.63" (16mm) of snow. In Sun River, during the entire year, snow falls for 69.4 days and aggregates up to 35.35" (898mm) of snow.Daylight
In Sun River, the average length of the day in May is 15h and 9min.On the first day of the month, sunrise is at 6:08 am and sunset at 8:39 pm. On the last day of May, sunrise is at 5:33 am and sunset at 9:15 pm MDT.
Sunshine
In May, the average sunshine is 10.1h.UV index
The average daily maximum UV index in May is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: A maximum daily UV index of 4 during May morphs into the following directions:
Guard yourself - An obligation to protect skin and eyes from harm exists. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Sun River, MT
- Average high temperature in May: 62.2°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is December (29.5°F).
- Average low temperature in May: 41.9°F
The month with the highest average low temperature is August (56.7°F).
The coldest month (with the lowest average low temperature) is December (17.4°F).
Average pressure in May
Sun River, MT
- Average pressure in May: 29.93"Hg
The months with the highest atmospheric pressure are January and December (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in May
Sun River, MT
- Average wind speed in May: 8.1mph
The windiest months (with the highest average wind speed) are January and November (10.7mph).
The calmest month (with the lowest average wind speed) is August (7.3mph).
Average humidity in May
Sun River, MT
- Average humidity in May: 59%
The month with the highest relative humidity is January (78%).
The month with the lowest relative humidity is August (41%).
Average rainfall in May
Sun River, MT
- Average rainfall in May: 1.69"
The wettest month (with the highest rainfall) is June (2.05").
The driest months (with the least rainfall) are January and July (0.63").
Average rainfall days in May
Sun River, MT
- Average rainfall days in May: 15.2 days
The month with the highest number of rainy days is May (15.2 days).
The month with the least rainy days is January (4.8 days).
Average snowfall in May
Sun River, MT
- Average snowfall in May: 0.63"
The month with the highest snowfall is February (6.34").
The months with the least snowfall are June, July and August (0").
Average snowfall days in May
Sun River, MT
- Average snowfall days in May: 1.2 days
The month with the highest number of snowfall days is February (14.4 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in May /
Average sunshine in May
Sun River, MT
- Average daylight in May: 15h and 6min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in May: 10h and 6min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The months with the least sunshine are January and December (Average sunshine: 5h and 24min).
Average sunshine days in May
Sun River, MT
- Average sunshine days in May: 12.8 days
The month with the most sunshine days is September (18.8 days).
The month with the least sunshine days is April (10.3 days).
Average UV index in May
Sun River, MT
- Average UV index in May: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in May
Sun River, MT
- Average cloud cover in May: 34
The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 14).
Average visibility in May
Sun River, MT
- 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).
