Creston, Washington has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 35 °F (low) to 57.6 °F (high). Annual precipitation averages 13.7 Inches. Creston is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Jun. 1 - Jun. 10 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 21.3 °F | 32.9 °F | 1.76 in. |
| February | 23.1 °F | 38.5 °F | 1.17 in. |
| March | 28.1 °F | 48.0 °F | 1.42 in. |
| April | 32.7 °F | 57.0 °F | 1.03 in. |
| May | 40.3 °F | 66.7 °F | 1.31 in. |
| June | 45.5 °F | 73.6 °F | 1.01 in. |
| July | 51.7 °F | 84.1 °F | 0.55 in. |
| August | 51.4 °F | 84.0 °F | 0.39 in. |
| September | 43.7 °F | 74.3 °F | 0.4 in. |
| October | 34.1 °F | 58.4 °F | 1.06 in. |
| November | 26.5 °F | 41.8 °F | 1.61 in. |
| December | 21.0 °F | 32.2 °F | 2.01 in. |
| Annual | 35 °F | 57.6 °F | 13.72 in. |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | Jun. 1 - Jun. 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°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 |