Wellington, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 34.1 °F (low) to 62.3 °F (high). Annual precipitation averages 14.2 Inches. Wellington is located in USDA Plant Hardiness Zone 5b. 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 | 15.4 °F | 42.2 °F | 0.29 in. |
| February | 16.9 °F | 43.4 °F | 0.32 in. |
| March | 24.8 °F | 53.3 °F | 0.87 in. |
| April | 31.7 °F | 59.5 °F | 1.67 in. |
| May | 41.5 °F | 68.1 °F | 2.91 in. |
| June | 50.8 °F | 79.9 °F | 1.93 in. |
| July | 56.3 °F | 86.3 °F | 1.57 in. |
| August | 54.0 °F | 83.9 °F | 1.37 in. |
| September | 45.6 °F | 76.3 °F | 1.29 in. |
| October | 33.7 °F | 62.9 °F | 1.13 in. |
| November | 23.2 °F | 50.6 °F | 0.53 in. |
| December | 15.6 °F | 41.5 °F | 0.34 in. |
| Annual | 34.1 °F | 62.3 °F | 14.22 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |