Kendall, Washington has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 5.3 °C (low) to 14.6 °C (high). Annual precipitation averages 1604 Millimeters. Kendall is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.2 °C | 5.6 °C | 215.9 mm |
| February | 0.4 °C | 7.7 °C | 127.76 mm |
| March | 1.8 °C | 10.4 °C | 166.12 mm |
| April | 4.1 °C | 14.1 °C | 118.62 mm |
| May | 7.2 °C | 18.1 °C | 99.57 mm |
| June | 9.9 °C | 20.5 °C | 78.99 mm |
| July | 11.8 °C | 24.2 °C | 47.75 mm |
| August | 11.8 °C | 24.8 °C | 47.75 mm |
| September | 9.1 °C | 20.9 °C | 87.88 mm |
| October | 5.8 °C | 14.7 °C | 168.15 mm |
| November | 2.3 °C | 8.7 °C | 245.87 mm |
| December | -0.2 °C | 5.2 °C | 199.64 mm |
| Annual | 5.3 °C | 14.6 °C | 1604 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |