North Washington, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 3 °C (low) to 18.9 °C (high). Annual precipitation averages 388.4 Millimeters. 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 | -7.3 °C | 8 °C | 12.7 mm |
| February | -6.4 °C | 8.5 °C | 14.22 mm |
| March | -2 °C | 13.7 °C | 30.48 mm |
| April | 1.7 °C | 17 °C | 51.31 mm |
| May | 6.8 °C | 21.9 °C | 64.01 mm |
| June | 12.1 °C | 28.7 °C | 40.13 mm |
| July | 15.5 °C | 32.2 °C | 46.48 mm |
| August | 14.4 °C | 30.9 °C | 37.85 mm |
| September | 9.5 °C | 26.6 °C | 31.5 mm |
| October | 2.6 °C | 19.2 °C | 27.69 mm |
| November | -3.1 °C | 12.6 °C | 19.3 mm |
| December | -7.4 °C | 7.5 °C | 12.7 mm |
| Annual | 3 °C | 18.9 °C | 388.37 mm |
| 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 : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |