Ashford, Washington has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 3.3 °C (low) to 13.5 °C (high). Annual precipitation averages 1871.5 Millimeters. Ashford is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -1.1 °C | 5.2 °C | 290.83 mm |
| February | -1.2 °C | 6.8 °C | 181.36 mm |
| March | -0.1 °C | 9.3 °C | 215.39 mm |
| April | 1.6 °C | 12.5 °C | 149.1 mm |
| May | 4.7 °C | 16.8 °C | 109.22 mm |
| June | 7.1 °C | 19.7 °C | 85.09 mm |
| July | 9.4 °C | 23.3 °C | 28.96 mm |
| August | 9.6 °C | 23.6 °C | 38.35 mm |
| September | 6.9 °C | 19.8 °C | 67.82 mm |
| October | 3.4 °C | 13.1 °C | 178.05 mm |
| November | 0.5 °C | 7.7 °C | 274.57 mm |
| December | -1.4 °C | 4.4 °C | 252.73 mm |
| Annual | 3.3 °C | 13.5 °C | 1871.47 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |