May weather forecastGarrison, MT
May
Weather in May
May, the last month of the spring in Garrison, is a moderate month, with temperature in the range of an average high of 55.6°F (13.1°C) and an average low of 33.6°F (0.9°C).Temperature
An escalation in the average high-temperature is seen with the onset of May, moving from a chilly 43.9°F (6.6°C) in April to a refreshing 55.6°F (13.1°C). Garrison registers a prominent dip from daytime highs, with an average of 33.6°F (0.9°C) during the nights of May.Humidity
In Garrison, the average relative humidity in May is 68%.Rainfall
In May, the rain falls for 17 days. Throughout May, 2.4" (61mm) of precipitation is accumulated. Throughout the year, there are 122.8 rainfall days, and 17.13" (435mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through June, September through December. In Garrison, in May, snow falls for 7.7 days, with typically accumulated 4.96" (126mm) of snow. In Garrison, during the entire year, snow falls for 125.4 days and aggregates up to 77.91" (1979mm) of snow.Daylight
In Garrison, the average length of the day in May is 15h and 2min.On the first day of May, sunrise is at 6:15 am and sunset at 8:41 pm. On the last day of the month, sunrise is at 5:41 am and sunset at 9:16 pm MDT.
Sunshine
The average sunshine in May is 10.1h.UV index
In May, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the average person.Note: In May, the maximum UV index of 4 suggests these recommendations:
Ensure safety - Sun damage prevention is strongly urged. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Garrison, MT
- Average high temperature in May: 55.6°F
The warmest month (with the highest average high temperature) is July (76.8°F).
The month with the lowest average high temperature is December (25.7°F).
- Average low temperature in May: 33.6°F
The month with the highest average low temperature is August (47.3°F).
The coldest month (with the lowest average low temperature) is December (12.6°F).
Average pressure in May
Garrison, MT
- Average pressure in May: 29.96"Hg
The months with the highest atmospheric pressure are January and December (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in May
Garrison, MT
- Average wind speed in May: 5.5mph
The windiest months (with the highest average wind speed) are January, April and November (6.3mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in May
Garrison, MT
- Average humidity in May: 68%
The months with the highest relative humidity are January and February (88%).
The months with the lowest relative humidity are July and August (49%).
Average rainfall in May
Garrison, MT
- Average rainfall in May: 2.4"
The wettest month (with the highest rainfall) is June (2.52").
The driest month (with the least rainfall) is August (0.67").
Average rainfall days in May
Garrison, MT
- Average rainfall days in May: 17 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is August (7.3 days).
Average snowfall in May
Garrison, MT
- Average snowfall in May: 4.96"
The month with the highest snowfall is February (12.76").
The months with the least snowfall are July and August (0").
Average snowfall days in May
Garrison, MT
- Average snowfall days in May: 7.7 days
The month with the highest number of snowfall days is February (20.3 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in May /
Average sunshine in May
Garrison, MT
- Average daylight in May: 15h and 0min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in May: 10h and 6min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is January (Average sunshine: 5h and 36min).
Average sunshine days in May
Garrison, MT
- Average sunshine days in May: 8.7 days
The month with the most sunshine days is July (21.5 days).
The month with the least sunshine days is April (6.3 days).
Average UV index in May
Garrison, MT
- Average UV index in May: 4
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 2).
Average cloud cover in May
Garrison, MT
- Average cloud cover in May: 35
The month with the most cloud cover is February (Cloud cover 50).
The months with the least cloud cover are July and August (Cloud cover 15).
Average visibility in May
Garrison, MT
- Average visibility in May: 6mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March and December (4mi).
