Endicott, Washington has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 37.8 °F (low) to 61.7 °F (high). Annual precipitation averages 16.7 Inches. Endicott is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 26.8 °F | 39.1 °F | 2.07 in. |
| February | 28.0 °F | 44.2 °F | 1.58 in. |
| March | 31.7 °F | 52.2 °F | 1.84 in. |
| April | 36.0 °F | 60.2 °F | 1.44 in. |
| May | 42.2 °F | 69.3 °F | 1.4 in. |
| June | 47.5 °F | 75.8 °F | 1.13 in. |
| July | 52.0 °F | 87.2 °F | 0.41 in. |
| August | 51.6 °F | 87.4 °F | 0.36 in. |
| September | 44.7 °F | 77.5 °F | 0.51 in. |
| October | 36.7 °F | 62.5 °F | 1.3 in. |
| November | 30.8 °F | 47.2 °F | 2.15 in. |
| December | 25.9 °F | 38.0 °F | 2.47 in. |
| Annual | 37.8 °F | 61.7 °F | 16.66 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°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 |