Weston, Colorado has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 32.9 °F (low) to 63.9 °F (high). Annual precipitation averages 17.4 Inches. Weston 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 Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 15.1 °F | 44.7 °F | 0.65 in. |
| February | 17.7 °F | 47.5 °F | 0.66 in. |
| March | 24.2 °F | 54.8 °F | 1.25 in. |
| April | 30.6 °F | 61.1 °F | 1.55 in. |
| May | 39.3 °F | 70.3 °F | 1.9 in. |
| June | 47.9 °F | 80.7 °F | 1.42 in. |
| July | 53.0 °F | 84.2 °F | 2.74 in. |
| August | 51.6 °F | 82.2 °F | 2.96 in. |
| September | 44.3 °F | 76.3 °F | 1.47 in. |
| October | 33.2 °F | 66.2 °F | 1.12 in. |
| November | 22.9 °F | 53.9 °F | 0.88 in. |
| December | 15.5 °F | 44.4 °F | 0.8 in. |
| Annual | 32.9 °F | 63.9 °F | 17.4 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | Over 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 | Extreme Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |