Prescott, Washington has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 5.6 °C (low) to 17.7 °C (high). Annual precipitation averages 398.5 Millimeters. Prescott is located in USDA Plant Hardiness Zone 7a. 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 | -1.7 °C | 5.2 °C | 45.47 mm |
| February | -0.8 °C | 8.1 °C | 35.56 mm |
| March | 1.9 °C | 13.1 °C | 41.91 mm |
| April | 4.4 °C | 17.1 °C | 38.61 mm |
| May | 8.2 °C | 22 °C | 40.39 mm |
| June | 11.4 °C | 25.9 °C | 30.73 mm |
| July | 14.6 °C | 31.7 °C | 8.64 mm |
| August | 14.4 °C | 31.3 °C | 10.67 mm |
| September | 10.2 °C | 26 °C | 14.73 mm |
| October | 5.1 °C | 17.8 °C | 33.02 mm |
| November | 1 °C | 9.7 °C | 48.01 mm |
| December | -1.8 °C | 4.8 °C | 50.8 mm |
| Annual | 5.6 °C | 17.7 °C | 398.54 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |