Spangle, Washington has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 35.9 °F (low) to 58.1 °F (high). Annual precipitation averages 19.7 Inches. Spangle is located in USDA Plant Hardiness Zone 6b. 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 | 24.2 °F | 35.9 °F | 2.45 in. |
| February | 25.2 °F | 40.2 °F | 1.72 in. |
| March | 29.3 °F | 48.4 °F | 2.16 in. |
| April | 34.0 °F | 56.3 °F | 1.49 in. |
| May | 40.7 °F | 65.6 °F | 1.81 in. |
| June | 46.3 °F | 72.0 °F | 1.5 in. |
| July | 50.5 °F | 83.4 °F | 0.44 in. |
| August | 50.2 °F | 83.8 °F | 0.48 in. |
| September | 42.7 °F | 74.2 °F | 0.62 in. |
| October | 34.6 °F | 59.0 °F | 1.61 in. |
| November | 28.9 °F | 43.7 °F | 2.5 in. |
| December | 23.7 °F | 34.8 °F | 2.96 in. |
| Annual | 35.9 °F | 58.1 °F | 19.74 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°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 |