Carbondale, Colorado has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 30.2 °F (low) to 61.1 °F (high). Annual precipitation averages 14.2 Inches. Carbondale is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 9.9 °F | 36.4 °F | 1.08 in. |
| February | 16.0 °F | 41.8 °F | 1.09 in. |
| March | 23.7 °F | 52.1 °F | 0.98 in. |
| April | 29.8 °F | 59.5 °F | 1.35 in. |
| May | 36.6 °F | 68.7 °F | 1.34 in. |
| June | 43.7 °F | 79.9 °F | 0.86 in. |
| July | 50.3 °F | 86.3 °F | 1.62 in. |
| August | 48.7 °F | 83.7 °F | 1.22 in. |
| September | 40.8 °F | 76.3 °F | 1.57 in. |
| October | 30.3 °F | 63.5 °F | 1.25 in. |
| November | 20.5 °F | 48.8 °F | 0.91 in. |
| December | 11.7 °F | 36.1 °F | 0.89 in. |
| Annual | 30.2 °F | 61.1 °F | 14.16 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Exceptional Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |