May weather forecastHarrison, MT
May
Weather in May
The last month of the spring, May, is a refreshing month in Harrison, Montana, with an average temperature fluctuating between 62.6°F (17°C) and 37.9°F (3.3°C).Temperature
The transition from April to May brings a temperature rise, with average high-temperatures increasing from a fresh 50.4°F (10.2°C) to a refreshing 62.6°F (17°C). May is characterized by a distinct thermal shift, with nighttime lows averaging at a wintry 37.9°F (3.3°C).Humidity
In May, the average relative humidity is 60%.Rainfall
In Harrison, in May, during 15.9 rainfall days, 1.42" (36mm) of precipitation is typically accumulated. In Harrison, during the entire year, the rain falls for 134.2 days and collects up to 11.34" (288mm) of precipitation.Snowfall
Months with snowfall are January through June, September through December. In Harrison, during May, snow falls for 1.3 days and regularly aggregates up to 0.83" (21mm) of snow. In Harrison, during the entire year, snow falls for 79.6 days and aggregates up to 30.08" (764mm) of snow.Daylight
In May, the average length of the day is 14h and 57min.On the first day of May in Harrison, sunrise is at 6:13 am and sunset at 8:35 pm. On the last day of the month, sunrise is at 5:41 am and sunset at 9:08 pm MDT.
Sunshine
In May, the average sunshine is 10.7h.UV index
The average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the average person.Note: In May, an average UV index of 4 transforms into the following instructions:
Exercise prevention - Precautions against solar damage are endorsed. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Harrison, MT
- Average high temperature in May: 62.6°F
The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is December (28°F).
- Average low temperature in May: 37.9°F
The month with the highest average low temperature is August (50.5°F).
The coldest month (with the lowest average low temperature) is December (12.7°F).
Average pressure in May
Harrison, MT
- Average pressure in May: 29.94"Hg
The months with the highest atmospheric pressure are January and December (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in May
Harrison, MT
- Average wind speed in May: 5mph
The windiest month (with the highest average wind speed) is April (5.5mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in May
Harrison, MT
- Average humidity in May: 60%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (44%).
Average rainfall in May
Harrison, MT
- Average rainfall in May: 1.42"
The wettest month (with the highest rainfall) is June (1.57").
The driest month (with the least rainfall) is August (0.51").
Average rainfall days in May
Harrison, MT
- Average rainfall days in May: 15.9 days
The month with the highest number of rainy days is April (16.5 days).
The month with the least rainy days is August (7.6 days).
Average snowfall in May
Harrison, MT
- Average snowfall in May: 0.83"
The month with the highest snowfall is February (6.02").
The months with the least snowfall are July and August (0").
Average snowfall days in May
Harrison, MT
- Average snowfall days in May: 1.3 days
The month with the highest number of snowfall days is February (16.5 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in May /
Average sunshine in May
Harrison, MT
- Average daylight in May: 14h and 54min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in May: 10h and 42min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 5h and 54min).
Average sunshine days in May
Harrison, MT
- Average sunshine days in May: 10.5 days
The month with the most sunshine days is September (18.7 days).
The month with the least sunshine days is April (9.3 days).
Average UV index in May
Harrison, MT
- Average UV index in May: 4
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in May
Harrison, MT
- Average cloud cover in May: 30
The month with the most cloud cover is February (Cloud cover 43).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility in May
Harrison, MT
- Average visibility in May: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
