Weather Avenue > 
Weather America > 
United States > 
Montana > 
| Month | Max. | Min. | Avg. |
|---|---|---|---|
| January | 6°C | -39°C | -10°C |
| February | 7°C | -20°C | -5°C |
| March | 11°C | -15°C | -2°C |
| April | 24°C | -9°C | 6°C |
| May | 22°C | -5°C | 7°C |
| June | 33°C | 0°C | 14°C |
| July | 33°C | 0°C | 19°C |
| August | 34°C | 3°C | 18°C |
| September | 32°C | 0°C | 16°C |
| October | 27°C | -17°C | 8°C |
| November | 16°C | -13°C | 2°C |
| December | 13°C | -15°C | -2°C |
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