Atwood, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 35.2 °F (low) to 65.4 °F (high). Annual precipitation averages 16 Inches. Atwood is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 14.6 °F | 42.3 °F | 0.3 in. |
| February | 16.8 °F | 44.9 °F | 0.42 in. |
| March | 25.1 °F | 55.7 °F | 0.79 in. |
| April | 32.6 °F | 63.0 °F | 1.62 in. |
| May | 43.3 °F | 72.0 °F | 2.63 in. |
| June | 53.5 °F | 84.5 °F | 2.36 in. |
| July | 59.9 °F | 91.3 °F | 2.59 in. |
| August | 56.8 °F | 88.8 °F | 2.05 in. |
| September | 47.6 °F | 80.4 °F | 1.24 in. |
| October | 34.2 °F | 66.8 °F | 1.13 in. |
| November | 23.2 °F | 52.9 °F | 0.46 in. |
| December | 14.5 °F | 41.9 °F | 0.4 in. |
| Annual | 35.2 °F | 65.4 °F | 15.99 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 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 | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |