Everson, Washington has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 42.3 °F (low) to 59.7 °F (high). Annual precipitation averages 46.1 Inches. Everson is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 33.2 °F | 44.7 °F | 6.03 in. |
| February | 34.1 °F | 47.9 °F | 3.61 in. |
| March | 36.6 °F | 52.4 °F | 4.76 in. |
| April | 40.3 °F | 58.6 °F | 3.74 in. |
| May | 45.6 °F | 65.6 °F | 3.02 in. |
| June | 50.3 °F | 69.9 °F | 2.26 in. |
| July | 52.9 °F | 75.8 °F | 1.42 in. |
| August | 52.5 °F | 76.8 °F | 1.31 in. |
| September | 48.2 °F | 70.9 °F | 2.58 in. |
| October | 42.7 °F | 59.7 °F | 5.15 in. |
| November | 37.4 °F | 49.9 °F | 6.61 in. |
| December | 33.2 °F | 43.9 °F | 5.62 in. |
| Annual | 42.3 °F | 59.7 °F | 46.11 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |