Creston, Washington has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 1.6 °C (low) to 14.2 °C (high). Annual precipitation averages 348.5 Millimeters. 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 | -5.9 °C | 0.5 °C | 44.7 mm |
| February | -4.9 °C | 3.6 °C | 29.72 mm |
| March | -2.2 °C | 8.9 °C | 36.07 mm |
| April | 0.4 °C | 13.9 °C | 26.16 mm |
| May | 4.6 °C | 19.3 °C | 33.27 mm |
| June | 7.5 °C | 23.1 °C | 25.65 mm |
| July | 10.9 °C | 28.9 °C | 13.97 mm |
| August | 10.8 °C | 28.9 °C | 9.91 mm |
| September | 6.5 °C | 23.5 °C | 10.16 mm |
| October | 1.2 °C | 14.7 °C | 26.92 mm |
| November | -3.1 °C | 5.4 °C | 40.89 mm |
| December | -6.1 °C | 0.1 °C | 51.05 mm |
| Annual | 1.6 °C | 14.2 °C | 348.47 mm |
| 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 : -20.6°C to -17.8°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 |