Valmont, Colorado has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.2 °F (low) to 65.3 °F (high). Annual precipitation averages 16.8 Inches. Valmont 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 | 17.8 °F | 45.4 °F | 0.53 in. |
| February | 19.7 °F | 46.6 °F | 0.71 in. |
| March | 27.3 °F | 56.1 °F | 1.57 in. |
| April | 33.7 °F | 62.1 °F | 2.36 in. |
| May | 42.9 °F | 70.6 °F | 2.81 in. |
| June | 51.9 °F | 82.9 °F | 1.47 in. |
| July | 58.1 °F | 89.1 °F | 1.8 in. |
| August | 55.9 °F | 87.0 °F | 1.32 in. |
| September | 47.7 °F | 79.2 °F | 1.6 in. |
| October | 35.8 °F | 66.1 °F | 1.27 in. |
| November | 25.8 °F | 53.7 °F | 0.79 in. |
| December | 17.8 °F | 44.6 °F | 0.57 in. |
| Annual | 36.2 °F | 65.3 °F | 16.8 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 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 | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |