Springdale, Washington has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 1.4 °C (low) to 14.9 °C (high). Annual precipitation averages 524.3 Millimeters. Springdale 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 Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.6 °C | 1.2 °C | 65.79 mm |
| February | -5.1 °C | 4.5 °C | 41.4 mm |
| March | -2.4 °C | 9.6 °C | 55.37 mm |
| April | 0.2 °C | 14.5 °C | 37.08 mm |
| May | 4.3 °C | 19.9 °C | 44.96 mm |
| June | 7.4 °C | 23.4 °C | 42.42 mm |
| July | 10 °C | 29.5 °C | 14.99 mm |
| August | 9.4 °C | 29.7 °C | 8.13 mm |
| September | 5.4 °C | 24.1 °C | 17.78 mm |
| October | 0.8 °C | 15.1 °C | 42.93 mm |
| November | -2.3 °C | 6.1 °C | 68.58 mm |
| December | -5.6 °C | 0.9 °C | 84.84 mm |
| Annual | 1.4 °C | 14.9 °C | 524.27 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| 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 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |