Thorp, Washington has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 36.9 °F (low) to 59.2 °F (high). Annual precipitation averages 12 Inches. Thorp is located in USDA Plant Hardiness Zone 6b. 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 | 22.7 °F | 35.3 °F | 1.74 in. |
| February | 24.9 °F | 42.0 °F | 1.03 in. |
| March | 29.3 °F | 50.5 °F | 1.11 in. |
| April | 34.7 °F | 58.6 °F | 0.84 in. |
| May | 42.2 °F | 67.6 °F | 0.88 in. |
| June | 48.5 °F | 73.9 °F | 0.64 in. |
| July | 54.4 °F | 83.6 °F | 0.34 in. |
| August | 53.6 °F | 83.2 °F | 0.22 in. |
| September | 45.5 °F | 74.7 °F | 0.46 in. |
| October | 35.9 °F | 60.5 °F | 1.07 in. |
| November | 28.1 °F | 44.9 °F | 1.52 in. |
| December | 22.6 °F | 35.1 °F | 2.12 in. |
| Annual | 36.9 °F | 59.2 °F | 11.97 in. |
| 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 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |