North Washington, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 37.4 °F (low) to 66 °F (high). Annual precipitation averages 15.3 Inches. North Washington 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 | 18.8 °F | 46.4 °F | 0.5 in. |
| February | 20.4 °F | 47.3 °F | 0.56 in. |
| March | 28.4 °F | 56.6 °F | 1.2 in. |
| April | 35.0 °F | 62.6 °F | 2.02 in. |
| May | 44.3 °F | 71.4 °F | 2.52 in. |
| June | 53.7 °F | 83.7 °F | 1.58 in. |
| July | 59.9 °F | 89.9 °F | 1.83 in. |
| August | 57.9 °F | 87.6 °F | 1.49 in. |
| September | 49.1 °F | 79.9 °F | 1.24 in. |
| October | 36.6 °F | 66.6 °F | 1.09 in. |
| November | 26.5 °F | 54.6 °F | 0.76 in. |
| December | 18.7 °F | 45.5 °F | 0.5 in. |
| Annual | 37.4 °F | 66 °F | 15.29 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 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 | BSk - Cold Semi-Arid Climate |