Weather Avenue > 
Weather America > 
United States > 
Montana > 
| Month | Max. | Min. | Avg. |
|---|---|---|---|
| January | 8°C | -35°C | -9°C |
| February | 11°C | -19°C | -3°C |
| March | 14°C | -16°C | -2°C |
| April | 21°C | -10°C | 5°C |
| May | 22°C | -6°C | 7°C |
| June | 31°C | -1°C | 14°C |
| July | 37°C | 4°C | 20°C |
| August | 36°C | 3°C | 18°C |
| September | 34°C | 2°C | 15°C |
| October | 27°C | -15°C | 7°C |
| November | 11°C | -11°C | 0°C |
| December | 9°C | -14°C | -2°C |
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