Missoula, MT Climate & Monthly Averages
The climate of 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).
Climate 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.
How Missoula compares
- Missoula averages 47°F (9°C) across the year - cooler than all but 5% of the 3496 cities we track.
Ranked against every city in our dataset, each measured on the same ten-year window.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Daylight | Wet-day chance | Humidity |
|---|---|---|---|---|---|---|---|---|
| January | 35° | 19° | 10 | 1.5 in | 5.7 h/day | 8.9 h | 32% | 72% |
| February | 37° | 20° | 12 | 2.0 in | 6.5 h/day | 10.2 h | 44% | 68% |
| March | 47° | 28° | 10 | 1.6 in | 8.9 h/day | 11.8 h | 34% | 62% |
| April | 56° | 34° | 10 | 1.8 in | 10.3 h/day | 13.5 h | 32% | 57% |
| May | 66° | 43° | 10 | 2.2 in | 11.8 h/day | 15.0 h | 31% | 58% |
| June | 75° | 51° | 8 | 1.8 in | 12.9 h/day | 15.9 h | 27% | 53% |
| July | 86° | 59° | 2 | 0.5 in | 14.2 h/day | 15.5 h | 7% | 39% |
| August | 85° | 58° | 3 | 0.7 in | 12.5 h/day | 14.2 h | 10% | 41% |
| September | 73° | 48° | 6 | 1.5 in | 10.3 h/day | 12.5 h | 20% | 53% |
| October | 58° | 37° | 10 | 2.0 in | 8.1 h/day | 10.8 h | 33% | 63% |
| November | 44° | 28° | 10 | 1.8 in | 6.2 h/day | 9.3 h | 34% | 67% |
| December | 36° | 22° | 12 | 2.0 in | 4.9 h/day | 8.5 h | 39% | 70% |
Missoula month by month
Average high and low for each month, with the bar showing where it sits in Missoula's year (left is the coldest night, right is the warmest afternoon).
January
- Rain
- 10 days
- Sunshine
- 5.7 h
- Daylight
- 8.9 h
- Snow
- 7 days
February
- Rain
- 12 days
- Sunshine
- 6.5 h
- Daylight
- 10.2 h
- Snow
- 7 days
March
- Rain
- 10 days
- Sunshine
- 8.9 h
- Daylight
- 11.8 h
- Snow
- 4 days
April
- Rain
- 10 days
- Sunshine
- 10.3 h
- Daylight
- 13.5 h
- Snow
- 3 days
May
- Rain
- 10 days
- Sunshine
- 11.8 h
- Daylight
- 15.0 h
June
- Rain
- 8 days
- Sunshine
- 12.9 h
- Daylight
- 15.9 h
July
- Rain
- 2 days
- Sunshine
- 14.2 h
- Daylight
- 15.5 h
August
- Rain
- 3 days
- Sunshine
- 12.5 h
- Daylight
- 14.2 h
September
- Rain
- 6 days
- Sunshine
- 10.3 h
- Daylight
- 12.5 h
October
- Rain
- 10 days
- Sunshine
- 8.1 h
- Daylight
- 10.8 h
- Snow
- 1 day
November
- Rain
- 10 days
- Sunshine
- 6.2 h
- Daylight
- 9.3 h
- Snow
- 4 days
December
- Rain
- 12 days
- Sunshine
- 4.9 h
- Daylight
- 8.5 h
- Snow
- 8 days
Warmer places to go, by month: January · February · March · April · May · June · July · August · September · October · November · December
Seasons in Missoula
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.
Climate questions, answered
Does it rain a lot in Missoula?
Does it freeze in Missoula?
Is Missoula hot in summer?
Is Missoula warmer or cooler than most cities?
Best time to visit Missoula
Aim for April to September if you get the choice: temperatures sit either side of the peak heat rather than in it, and highs average 73°F (23°C) against roughly 6 wet days a month. For the same question asked the other way round, see where else is warm in April.
Pack for Missoula with light clothing for the warm months, a heavy insulated coat, hat and gloves for winter and a compact umbrella or rain shell. July nights average 59°F (15°C), so evenings rarely match the afternoons.
Missoula temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ. Need the precipitation in other units? The mm-to-inches rainfall converter handles it.