Hungry Horse, Montana has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -0.1 °C (low) to 12.6 °C (high). Annual precipitation averages 682 Millimeters. Hungry Horse is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.1 °C | -0.4 °C | 61.47 mm |
| February | -7.7 °C | 2 °C | 46.23 mm |
| March | -4.4 °C | 6.8 °C | 48.77 mm |
| April | -0.9 °C | 12.1 °C | 51.56 mm |
| May | 3.2 °C | 17.9 °C | 64.01 mm |
| June | 6.7 °C | 21.5 °C | 89.41 mm |
| July | 9.1 °C | 27.6 °C | 34.8 mm |
| August | 8.1 °C | 27.4 °C | 29.21 mm |
| September | 4.2 °C | 21 °C | 46.48 mm |
| October | -0.5 °C | 12.2 °C | 69.09 mm |
| November | -3.9 °C | 4.2 °C | 70.1 mm |
| December | -7.3 °C | -0.6 °C | 70.87 mm |
| Annual | -0.1 °C | 12.6 °C | 682 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |