May weather forecastKalispell, MT

May
Weather in May
In May, Kalispell's weather becomes significantly milder, with the lingering signs of winter finally disappearing. The rainfall indeed increases compared to April, but the longer hours of sunshine compensate for this. The temperature gradient also becomes milder, making May a pleasantly warm month in Kalispell. The city boasts 1.61" (41mm) of rainfall, a complete absence of snowfall, and temperatures varying from 35.6°F (2°C) to 59.5°F (15.3°C). This paints a picture of comfortable climes and encourages locals to spend more time in the outdoors.Temperature
The shift into May is marked by a rise in the average high-temperature, moving from April's chilly 46.8°F (8.2°C) to a mild 59.5°F (15.3°C). May presents a pronounced difference from daytime highs, with a consistent average low-temperature of 35.6°F (2°C).Humidity
The average relative humidity in May is 68%.Rainfall
In Kalispell, during May, the rain falls for 15.4 days and regularly aggregates up to 1.61" (41mm) of precipitation. Throughout the year, there are 142.8 rainfall days, and 17.36" (441mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, September through December. May is the last month it regularly snows. During 0.9 snowfall days, in May, Kalispell aggregates 0.71" (18mm) of snow. In Kalispell, during the entire year, snow falls for 104.7 days and aggregates up to 51.34" (1304mm) of snow.Daylight
In May, the average length of the day in Kalispell, Montana, is 15h and 14min.On the first day of May, sunrise is at 6:16 am and sunset at 8:51 pm. On the last day of the month, sunrise is at 5:41 am and sunset at 9:29 pm MDT.
Sunshine
In May, the average sunshine is 10.4h.UV index
The average daily maximum UV index in May in Kalispell, Montana, is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: The maximum daily UV index, 4 in May, converts into the following recommendations:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Kalispell, MT
- Average high temperature in May: 59.5°F
The warmest month (with the highest average high temperature) is July (77.5°F).
The month with the lowest average high temperature is December (25.9°F).
- Average low temperature in May: 35.6°F
The month with the highest average low temperature is August (46.4°F).
The coldest month (with the lowest average low temperature) is February (14.4°F).
Average pressure in May
Kalispell, MT
- Average pressure in May: 29.96"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in May
Kalispell, MT
- Average wind speed in May: 4.4mph
The windiest month (with the highest average wind speed) is April (4.7mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in May
Kalispell, MT
- Average humidity in May: 68%
The month with the highest relative humidity is January (93%).
The month with the lowest relative humidity is August (55%).
Average rainfall in May
Kalispell, MT
- Average rainfall in May: 1.61"
The wettest month (with the highest rainfall) is June (2.05").
The driest month (with the least rainfall) is August (0.55").
Average rainfall days in May
Kalispell, MT
- Average rainfall days in May: 15.4 days
The month with the highest number of rainy days is April (17.9 days).
The month with the least rainy days is August (6.6 days).
Average snowfall in May
Kalispell, MT
- Average snowfall in May: 0.71"
The month with the highest snowfall is January (11.3").
The months with the least snowfall are June, July and August (0").
Average snowfall days in May
Kalispell, MT
- Average snowfall days in May: 0.9 days
The month with the highest number of snowfall days is December (21.5 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Kalispell, MT
- Average daylight in May: 15h and 12min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in May: 10h and 24min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in May
Kalispell, MT
- Average sunshine days in May: 12.9 days
The month with the most sunshine days is August (21.8 days).
The month with the least sunshine days is February (6.8 days).
Average UV index in May
Kalispell, 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, November and December (UV index 1).
Average cloud cover in May
Kalispell, MT
- Average cloud cover in May: 33
The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are July and August (Cloud cover 15).
Average visibility in May
Kalispell, MT
- Average visibility in May: 6mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The month with the lowest visibility is January (3mi).





