Montana Climate: Weather by Month and Best Time to Visit
Best months for Montana: September, August, July, June.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 4°C | -3°C | 46 mm | 8 | – | – | 4.7 |
| February | 7°C | -2°C | 43 mm | 8 | – | – | 5.3 |
| March | 12°C | 2°C | 63 mm | 10 | – | – | 6.2 |
| April | 18°C | 7°C | 73 mm | 10 | – | – | 7.1 |
| May | 23°C | 12°C | 77 mm | 11 | – | – | 7.6 |
| June | 27°C | 16°C | 75 mm | 10 | – | – | 7.8 |
| July | 29°C | 17°C | 62 mm | 8 | – | – | 8.0 |
| August | 30°C | 17°C | 43 mm | 6 | – | – | 8.1 |
| September | 24°C | 13°C | 55 mm | 6 | – | – | 8.3 |
| October | 18°C | 8°C | 51 mm | 7 | – | – | 7.5 |
| November | 11°C | 3°C | 44 mm | 8 | – | – | 6.3 |
| December | 5°C | -2°C | 50 mm | 9 | – | – | 4.9 |