Summitview, Washington has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 37.6 °F (low) to 62.3 °F (high). Annual precipitation averages 9.7 Inches. Summitview 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 Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 23.9 °F | 38.1 °F | 1.62 in. |
| February | 26.3 °F | 45.3 °F | 1.06 in. |
| March | 30.7 °F | 54.0 °F | 0.84 in. |
| April | 35.8 °F | 61.9 °F | 0.65 in. |
| May | 43.3 °F | 71.3 °F | 0.86 in. |
| June | 49.2 °F | 77.9 °F | 0.54 in. |
| July | 54.8 °F | 87.0 °F | 0.28 in. |
| August | 53.7 °F | 86.2 °F | 0.18 in. |
| September | 45.9 °F | 77.5 °F | 0.34 in. |
| October | 36.3 °F | 63.0 °F | 0.79 in. |
| November | 28.3 °F | 47.8 °F | 1.04 in. |
| December | 23.0 °F | 37.1 °F | 1.51 in. |
| Annual | 37.6 °F | 62.3 °F | 9.71 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 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 |