Deer Trail, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 34.3 °F (low) to 64.4 °F (high). Annual precipitation averages 16.8 Inches. Deer Trail 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 | 14.3 °F | 42.9 °F | 0.4 in. |
| February | 16.7 °F | 44.7 °F | 0.43 in. |
| March | 24.8 °F | 54.5 °F | 1.12 in. |
| April | 31.6 °F | 61.2 °F | 2.03 in. |
| May | 41.4 °F | 70.5 °F | 2.5 in. |
| June | 51.1 °F | 82.6 °F | 1.87 in. |
| July | 57.6 °F | 89.4 °F | 2.71 in. |
| August | 55.7 °F | 86.8 °F | 2.23 in. |
| September | 46.9 °F | 79.3 °F | 0.98 in. |
| October | 33.7 °F | 65.4 °F | 1.12 in. |
| November | 22.9 °F | 52.5 °F | 0.81 in. |
| December | 14.6 °F | 42.6 °F | 0.6 in. |
| Annual | 34.3 °F | 64.4 °F | 16.8 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 | Moderate Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |