Weldona, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 33.4 °F (low) to 64.6 °F (high). Annual precipitation averages 14.9 Inches. Weldona is located in USDA Plant Hardiness Zone 5a. 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 | 11.6 °F | 41.0 °F | 0.3 in. |
| February | 14.3 °F | 45.1 °F | 0.32 in. |
| March | 23.7 °F | 55.7 °F | 0.73 in. |
| April | 31.6 °F | 62.3 °F | 1.47 in. |
| May | 42.8 °F | 71.7 °F | 2.45 in. |
| June | 52.7 °F | 83.5 °F | 2.26 in. |
| July | 58.0 °F | 89.1 °F | 2.25 in. |
| August | 55.6 °F | 87.1 °F | 1.91 in. |
| September | 46.1 °F | 80.0 °F | 1.25 in. |
| October | 32.0 °F | 66.6 °F | 1.12 in. |
| November | 20.7 °F | 51.8 °F | 0.48 in. |
| December | 12.1 °F | 41.3 °F | 0.34 in. |
| Annual | 33.4 °F | 64.6 °F | 14.88 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 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |