United States of America
Great Falls sees feels-like daytime highs peak around 31.3°C in July and nighttime lows bottom out near -7.4°C in January. June is the wettest month (~57 mm), while January is the driest (~2 mm). For sunshine, July leads with about 73% clear skies.
Based on mild feels-like temperatures and low rain chances, the most comfortable months are June, August, and July — expect around 13.2–25.5°C with roughly 28% chance of rain on a given day in June.
| Month | Low / High °C | Rain % | Rainfall | Clear skies | Wind |
|---|---|---|---|---|---|
| January | -7.4° / 0.9° | 2% | 2 mm | 37% | 18.8 kph |
| February | -5.9° / 3.3° | 2% | 2 mm | 39% | 17.7 kph |
| March | -2° / 7.6° | 6% | 9 mm | 38% | 16.3 kph |
| April | 3° / 14.2° | 14% | 24 mm | 42% | 15.4 kph |
| May | 8.2° / 19.4° | 25% | 51 mm | 47% | 14.3 kph |
| June☀ | 13.2° / 25.5° | 28% | 57 mm | 58% | 13.3 kph |
| July☀ | 16.8° / 31.3° | 20% | 33 mm | 73% | 12.2 kph |
| August☀ | 15.9° / 31.3° | 16% | 28 mm | 71% | 11.9 kph |
| September | 10.4° / 24° | 15% | 28 mm | 61% | 13.5 kph |
| October | 4.6° / 14.6° | 10% | 18 mm | 52% | 15.9 kph |
| November | -2.2° / 5.4° | 5% | 6 mm | 43% | 17.8 kph |
| December | -6.7° / 0.2° | 2% | 3 mm | 39% | 18.8 kph |
Feels-like temperatures from long-term historical data; ☀ marks the most comfortable months (mild temperatures, low rain).
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