Red Lodge, Montana has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -0.2 °C (low) to 12.8 °C (high). Annual precipitation averages 549.9 Millimeters. 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 | -8.9 °C | 2.8 °C | 26.67 mm |
| February | -9.1 °C | 2.4 °C | 28.45 mm |
| March | -5.6 °C | 6.9 °C | 39.88 mm |
| April | -2 °C | 10.7 °C | 64.52 mm |
| May | 2.7 °C | 15.6 °C | 102.62 mm |
| June | 6.9 °C | 21.2 °C | 64.52 mm |
| July | 10.7 °C | 26.6 °C | 42.16 mm |
| August | 10.3 °C | 26.1 °C | 26.67 mm |
| September | 5.9 °C | 20.4 °C | 42.93 mm |
| October | 0.2 °C | 12.7 °C | 54.1 mm |
| November | -5.1 °C | 6.2 °C | 32.77 mm |
| December | -8.7 °C | 2.2 °C | 24.64 mm |
| Annual | -0.2 °C | 12.8 °C | 549.93 mm |
| 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 : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |