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The weather in Missoula in October is very cold with temperatures between -2°C and 13°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Missoula during the month of October. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
You can expect a few days of snow in Missoula during October. It’s important to get out your snow boots and warm mittens to stay warm while you explore Missoula.
Our weather forecast can give you a great sense of what weather to expect in Missoula in October 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 |