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The weather in Missoula in May is very cold with temperatures between 0°C and 17°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Missoula during the month of May. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Please note that Missoula can expect a few days of snow in May.
Our weather forecast can give you a great sense of what weather to expect in Missoula in May 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 |