Glenwood Springs, Colorado has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 32.5 °F (low) to 62.8 °F (high). Annual precipitation averages 18.6 Inches. Glenwood Springs is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 12.7 °F | 37.2 °F | 1.54 in. |
| February | 18.2 °F | 42.9 °F | 1.54 in. |
| March | 25.6 °F | 53.5 °F | 1.45 in. |
| April | 31.5 °F | 60.9 °F | 1.95 in. |
| May | 38.9 °F | 70.6 °F | 2.08 in. |
| June | 46.2 °F | 82.3 °F | 1.0 in. |
| July | 53.2 °F | 89.0 °F | 1.17 in. |
| August | 51.6 °F | 86.4 °F | 1.19 in. |
| September | 43.2 °F | 78.4 °F | 1.98 in. |
| October | 32.5 °F | 65.1 °F | 1.9 in. |
| November | 22.6 °F | 49.9 °F | 1.53 in. |
| December | 13.9 °F | 37.1 °F | 1.28 in. |
| Annual | 32.5 °F | 62.8 °F | 18.61 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Exceptional Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |