Gypsum, Colorado has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 28.9 °F (low) to 59.9 °F (high). Annual precipitation averages 12.2 Inches. Gypsum is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 9.0 °F | 34.9 °F | 0.92 in. |
| February | 15.4 °F | 40.0 °F | 1.01 in. |
| March | 23.2 °F | 50.5 °F | 1.1 in. |
| April | 28.9 °F | 58.3 °F | 1.19 in. |
| May | 34.9 °F | 68.4 °F | 1.06 in. |
| June | 42.2 °F | 80.0 °F | 0.78 in. |
| July | 49.1 °F | 85.3 °F | 1.05 in. |
| August | 47.1 °F | 82.6 °F | 0.92 in. |
| September | 39.0 °F | 75.8 °F | 1.34 in. |
| October | 29.3 °F | 62.5 °F | 1.14 in. |
| November | 18.9 °F | 46.7 °F | 0.97 in. |
| December | 9.7 °F | 34.2 °F | 0.72 in. |
| Annual | 28.9 °F | 59.9 °F | 12.2 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Exceptional Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |