Endicott, Washington has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 3.2 °C (low) to 16.5 °C (high). Annual precipitation averages 423.2 Millimeters. 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 | -2.9 °C | 3.9 °C | 52.58 mm |
| February | -2.2 °C | 6.8 °C | 40.13 mm |
| March | -0.2 °C | 11.2 °C | 46.74 mm |
| April | 2.2 °C | 15.7 °C | 36.58 mm |
| May | 5.7 °C | 20.7 °C | 35.56 mm |
| June | 8.6 °C | 24.3 °C | 28.7 mm |
| July | 11.1 °C | 30.7 °C | 10.41 mm |
| August | 10.9 °C | 30.8 °C | 9.14 mm |
| September | 7.1 °C | 25.3 °C | 12.95 mm |
| October | 2.6 °C | 16.9 °C | 33.02 mm |
| November | -0.7 °C | 8.4 °C | 54.61 mm |
| December | -3.4 °C | 3.3 °C | 62.74 mm |
| Annual | 3.2 °C | 16.5 °C | 423.16 mm |
| 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 : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |