| 2023 Hardiness Zone: | Zone 10b: 35°F to 40°F Zone 9b: 25°F to 30°F Zone 10a: 30°F to 35°F | |
| 2012 Hardiness Zone: | Zone 9a: 20°F to 25°F Zone 9b: 25°F to 30°F Zone 10a: 30°F to 35°F | |
| 1990 Hardiness Zone: | Zone 9b: 25F to 30F | |
| Average First Frost Date: | December 1 - 10 | |
| Average Last Frost Date: | February 1 - 10 | |
| Koppen-Geiger Climate Zone: | BWh - Hot Desert Climate | |
| Ecoregion: | ||
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 181 - 210 days Over 86°F |
Annual Climate Data for ZIP Code 92274 - Thermal, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 39 | 44 | 49 | 55 | 62 | 69 | 75 | 75 | 69 | 57 | 44 | 38 | 56 |
| Avg Max Temp (°F) | 71 | 76 | 81 | 88 | 95 | 104 | 108 | 106 | 102 | 91 | 79 | 71 | 89 |
| Avg Precip (In.) | .69 | .61 | .37 | .06 | .06 | .02 | .16 | .31 | .38 | .18 | .18 | .29 | 3.32 |