Rifle, Colorado has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.8 °C (low) to 18 °C (high). Annual precipitation averages 318 Millimeters. Rifle is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10.4 °C | 3.3 °C | 24.13 mm |
| February | -7 °C | 6.9 °C | 22.1 mm |
| March | -3.2 °C | 12.7 °C | 21.08 mm |
| April | 0.1 °C | 17.2 °C | 28.7 mm |
| May | 4.4 °C | 22.8 °C | 32.77 mm |
| June | 8.8 °C | 29.5 °C | 18.03 mm |
| July | 12.9 °C | 32.8 °C | 24.89 mm |
| August | 11.8 °C | 31.3 °C | 27.18 mm |
| September | 6.8 °C | 26.6 °C | 40.13 mm |
| October | 0.3 °C | 19 °C | 33.27 mm |
| November | -4.9 °C | 10.7 °C | 23.11 mm |
| December | -9.9 °C | 3.4 °C | 22.61 mm |
| Annual | 0.8 °C | 18 °C | 318 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Exceptional Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |