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The temperatures in Missoula in August are quite cold with temperatures between 7°C and 29°C, warm clothes are a must.
The wather in Missoula in August can vary between cold and nice weather days. Expect a few rainy days but usually not more than 3.
Our weather forecast can give you a great sense of what weather to expect in Missoula in August 2025.
If you’re planning to visit Missoula in the near future, we highly recommend that you review the 14 day weather forecast for Missoula before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 1° / -10° | 8 | 6 | 18 | 36 mm | Awful | Missoula in January |
| February | 1° / -11° | 8 | 3 | 19 | 42 mm | Awful | Missoula in February |
| March | 6° / -6° | 8 | 9 | 14 | 40 mm | Awful | Missoula in March |
| April | 10° / -4° | 8 | 13 | 9 | 41 mm | Bad | Missoula in April |
| May | 17° / 0° | 6 | 23 | 2 | 42 mm | Ok | Missoula in May |
| June | 22° / 3° | 6 | 25 | 0 | 40 mm | Good | Missoula in June |
| July | 29° / 7° | 2 | 29 | 0 | 12 mm | Good | Missoula in July |
| August | 29° / 7° | 2 | 29 | 0 | 15 mm | Good | Missoula in August |
| September | 23° / 4° | 2 | 28 | 0 | 19 mm | Perfect | Missoula in September |
| October | 13° / -2° | 5 | 23 | 4 | 35 mm | Bad | Missoula in October |
| November | 5° / -7° | 7 | 12 | 12 | 32 mm | Awful | Missoula in November |
| December | 0° / -11° | 9 | 5 | 18 | 34 mm | Awful | Missoula in December |