| 2023 Hardiness Zone: | 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 11 - May 20 |
| Koppen-Geiger Climate Zone: | BSk - Cold Semi-Arid Climate |
| Ecoregion: | 10e - Pleistocene Lake Basins |
| Heat Zone Days: | 46 - 60 days Over 86°F |
Annual Climate Data for ZIP Code 98951 - Wapato, WA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 23 | 27 | 33 | 38 | 46 | 52 | 57 | 56 | 47 | 37 | 29 | 23 | 39 |
| Avg Max Temp (°F) | 38 | 46 | 56 | 65 | 73 | 80 | 88 | 87 | 78 | 65 | 48 | 38 | 64 |
| Avg Precip (In.) | 1.16 | .72 | .7 | .56 | .58 | .58 | .31 | .36 | .4 | .55 | 1.05 | 1.27 | 8.23 |