Weather Avenue > 
Weather America > 
United States > 
Montana > 
| Month | Max. | Min. | Avg. |
|---|---|---|---|
| January | 15°C | -36°C | -6°C |
| February | 16°C | -23°C | -3°C |
| March | 17°C | -14°C | 1°C |
| April | 23°C | -5°C | 8°C |
| May | 27°C | -1°C | 11°C |
| June | 32°C | 3°C | 16°C |
| July | 41°C | 10°C | 24°C |
| August | 40°C | 9°C | 22°C |
| September | 34°C | 1°C | 18°C |
| October | 29°C | -20°C | 8°C |
| November | 16°C | -7°C | 3°C |
| December | 13°C | -8°C | 2°C |
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