Haugan, Montana has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 31.4 °F (low) to 56.9 °F (high). Annual precipitation averages 30.3 Inches. Haugan is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 19.0 °F | 33.3 °F | 3.91 in. |
| February | 19.9 °F | 38.1 °F | 3.0 in. |
| March | 24.7 °F | 47.0 °F | 3.43 in. |
| April | 29.6 °F | 55.5 °F | 1.93 in. |
| May | 36.2 °F | 65.8 °F | 2.16 in. |
| June | 42.5 °F | 72.8 °F | 2.25 in. |
| July | 46.3 °F | 84.1 °F | 0.78 in. |
| August | 44.8 °F | 84.4 °F | 0.89 in. |
| September | 38.2 °F | 72.5 °F | 1.28 in. |
| October | 31.3 °F | 56.4 °F | 2.87 in. |
| November | 25.5 °F | 40.3 °F | 3.77 in. |
| December | 19.3 °F | 32.3 °F | 4.03 in. |
| Annual | 31.4 °F | 56.9 °F | 30.3 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |