| 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: | Dsb - Humid Continental Climate - Dry Cool Summer | |
| Ecoregion: | 10e - Pleistocene Lake Basins | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 31 - 45 days Over 86°F |
Annual Climate Data for ZIP Code 98948 - Toppenish, WA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 23 | 27 | 33 | 39 | 46 | 52 | 57 | 56 | 48 | 37 | 30 | 24 | 39 |
| Avg Max Temp (°F) | 39 | 47 | 57 | 65 | 74 | 81 | 89 | 88 | 79 | 66 | 49 | 39 | 65 |
| Avg Precip (In.) | 1.13 | .7 | .69 | .55 | .57 | .56 | .27 | .32 | .4 | .53 | 1.04 | 1.25 | 8.03 |