| 2023 Hardiness Zone: | Zone 10a: 30°F to 35°F | |
| 2012 Hardiness Zone: | Zone 9b: 25°F to 30°F Zone 10a: 30°F to 35°F | |
| 1990 Hardiness Zone: | Zone 10a: 30F to 35F | |
| Average First Frost Date: | Frost Rare | |
| Average Last Frost Date: | Frost Rare | |
| 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 92250 - Holtville, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 41 | 44 | 48 | 53 | 60 | 68 | 75 | 76 | 70 | 59 | 47 | 40 | 57 |
| Avg Max Temp (°F) | 69 | 74 | 79 | 85 | 93 | 103 | 107 | 106 | 101 | 90 | 78 | 69 | 88 |
| Avg Precip (In.) | .49 | .35 | .31 | .07 | .04 | .01 | .14 | .38 | .32 | .29 | .15 | .42 | 2.97 |