Springdale, Washington has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 34.5 °F (low) to 58.8 °F (high). Annual precipitation averages 20.6 Inches. 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 | 22.0 °F | 34.1 °F | 2.59 in. |
| February | 22.9 °F | 40.1 °F | 1.63 in. |
| March | 27.7 °F | 49.3 °F | 2.18 in. |
| April | 32.4 °F | 58.1 °F | 1.46 in. |
| May | 39.8 °F | 67.9 °F | 1.77 in. |
| June | 45.4 °F | 74.1 °F | 1.67 in. |
| July | 50.0 °F | 85.1 °F | 0.59 in. |
| August | 49.0 °F | 85.5 °F | 0.32 in. |
| September | 41.8 °F | 75.3 °F | 0.7 in. |
| October | 33.5 °F | 59.1 °F | 1.69 in. |
| November | 27.8 °F | 43.0 °F | 2.7 in. |
| December | 21.9 °F | 33.7 °F | 3.34 in. |
| Annual | 34.5 °F | 58.8 °F | 20.64 in. |
| 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 : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |