Missoula, MT Weather
Missoula hourly forecast: next 24 hours
Today's high of 95°F (35°C) is about 10°F (6°C) above the typical August high of 85°F (29°C).
Current conditions in detail
Missoula weather tomorrow (Thursday, August 27)
Tomorrow in Missoula looks overcast, with a high of 90° and an overnight low of 54°. Rain is unlikely (8% chance). Winds top out near 10 mph, and the UV index reaches 5 (moderate).
Missoula 14-day forecast
About the weather in Missoula
A 26°C spread between its warmest and coolest months puts Missoula among the more strongly seasonal places we cover. July averages 86°F (30°C) by day; January averages 35°F (2°C), with nights at 19°F (-7°C).
Missoula weather: quick facts
- Hottest month: July - highs near 86°F (30°C)
- Coldest month: January - highs near 35°F (2°C)
- Decade extremes (2015-2024): 103°F (40°C) high · -35°F (-37°C) low
- Wettest month: May (10 rainy days) · Sunniest: July (14.2 h sun/day)
- Climate type: semi-arid
- Annual swing: 26°C between the average warmest and coolest month · day to night: 12°C
- Snow: about 34 days a year
- Months averaging 30°C or hotter: 1
- Average humidity: 59%
Temperatures through the year
January bottoms out at 35°F (2°C) in daylight, 19°F (-7°C) after dark. Warmth peaks in July: highs of 86°F (30°C), lows of 59°F (15°C). Across the gridded 2015-2024 daily record, the highest daily maximum for this location was 103°F (40°C) and the lowest daily minimum -35°F (-37°C). Sunshine averages 9.4 hours a day over the year, peaking in July at 14.2 hours.
Rain, sun and snow
Three of the twelve months pair mild highs with fewer than twelve wet days; the longest unbroken run is May through June. Relative humidity averages 59% across the year, drier than about 86% of the cities we track. Between the average July and the average January lie 26°C, a wider spread than roughly 87% of the cities we track. Snow falls on roughly 34 days a year, mostly October through April.
Season by season
Spring (March through May)
Spring stays on the cool side of mild here - highs near 56°F (14°C), nights near 35°F (2°C), and expect showers on roughly 30 days across the season, plus about 7 snowy days. Daylight is generous - around 10.3 hours of sun a day.
Summer (June through August)
Summer in Missoula brings hot afternoons, with daytime highs averaging 82°F (28°C) and nights around 56°F (13°C); rain comes on about 14 days over the three months. Daylight is generous - around 13.2 hours of sun a day.
Fall (September through November)
Fall in Missoula runs cool rather than cold, with daytime highs averaging 58°F (15°C) and nights around 38°F (3°C); expect showers on roughly 26 days across the season, plus about 6 snowy days.
Winter (December through February)
Through winter, Missoula brings deep cold: 36°F (2°C) by day, 20°F (-7°C) after dark, and rain falls on around 34 of the 90 days, plus about 22 snowy days. Wind sharpens cold like this considerably; pair the forecast winds with the wind speed converter to judge exposed conditions.
Average temperatures in Missoula by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 35° | 19° | 10 | 1.5 in | 5.7 h/day | 72% |
| February | 37° | 20° | 12 | 2.0 in | 6.5 h/day | 68% |
| March | 47° | 28° | 10 | 1.6 in | 8.9 h/day | 62% |
| April | 56° | 34° | 10 | 1.8 in | 10.3 h/day | 57% |
| May | 66° | 43° | 10 | 2.2 in | 11.8 h/day | 58% |
| June | 75° | 51° | 8 | 1.8 in | 12.9 h/day | 53% |
| July | 86° | 59° | 2 | 0.5 in | 14.2 h/day | 39% |
| August | 85° | 58° | 3 | 0.7 in | 12.5 h/day | 41% |
| September | 73° | 48° | 6 | 1.5 in | 10.3 h/day | 53% |
| October | 58° | 37° | 10 | 2.0 in | 8.1 h/day | 63% |
| November | 44° | 28° | 10 | 1.8 in | 6.2 h/day | 67% |
| December | 36° | 22° | 12 | 2.0 in | 4.9 h/day | 70% |