Red Lodge, Montana has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 31.6 °F (low) to 55.1 °F (high). Annual precipitation averages 21.7 Inches. Red Lodge is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Jun. 1 - Jun. 10 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 15.9 °F | 37.1 °F | 1.05 in. |
| February | 15.6 °F | 36.3 °F | 1.12 in. |
| March | 21.9 °F | 44.5 °F | 1.57 in. |
| April | 28.4 °F | 51.3 °F | 2.54 in. |
| May | 36.8 °F | 60.1 °F | 4.04 in. |
| June | 44.4 °F | 70.2 °F | 2.54 in. |
| July | 51.3 °F | 79.8 °F | 1.66 in. |
| August | 50.6 °F | 78.9 °F | 1.05 in. |
| September | 42.7 °F | 68.7 °F | 1.69 in. |
| October | 32.3 °F | 54.8 °F | 2.13 in. |
| November | 22.8 °F | 43.2 °F | 1.29 in. |
| December | 16.3 °F | 36.0 °F | 0.97 in. |
| Annual | 31.6 °F | 55.1 °F | 21.65 in. |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | Jun. 1 - Jun. 10 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |