| 2023 Hardiness Zone: | Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F |
| 1990 Hardiness Zone: | Zone 6b: -5F to 0F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | May 1 - May 10 |
| Koppen-Geiger Climate Zone: | Csa - Hot-Summer Mediterranean Climate |
| Ecoregion: | 10b - Loess Islands |
| Heat Zone Days: | 31 - 45 days Over 86°F |
Annual Climate Data for ZIP Code 99348 - Prescott, WA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 27 | 31 | 35 | 40 | 46 | 52 | 58 | 58 | 49 | 40 | 34 | 28 | 41 |
| Avg Max Temp (°F) | 40 | 47 | 55 | 63 | 71 | 79 | 88 | 88 | 78 | 65 | 49 | 41 | 64 |
| Avg Precip (In.) | 1.89 | 1.6 | 1.73 | 1.43 | 1.53 | 1.09 | .5 | .65 | .75 | 1.39 | 2.25 | 2.11 | 16.93 |