| 2023 Hardiness Zone: | Zone 9b: 25°F to 30°F | |
| 2012 Hardiness Zone: | Zone 9a: 20°F to 25°F Zone 9b: 25°F to 30°F | |
| 1990 Hardiness Zone: | Zone 9a: 20F to 25F | |
| Average First Frost Date: | Dec. 1 - Dec. 10 | |
| Average Last Frost Date: | Feb. 21 - Feb. 29 | |
| Koppen-Geiger Climate Zone: | BSk - Cold Semi-Arid Climate | |
| Ecoregion: | ||
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 121 - 150 days Over 86°F |
Annual Climate Data for ZIP Code 92571 - Perris, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 38 | 40 | 42 | 45 | 50 | 55 | 60 | 61 | 57 | 50 | 42 | 38 | 48 |
| Avg Max Temp (°F) | 66 | 68 | 69 | 76 | 82 | 90 | 97 | 98 | 92 | 84 | 74 | 67 | 80 |
| Avg Precip (In.) | 2.9 | 2.85 | 2.58 | .7 | .36 | .08 | .07 | .24 | .35 | .37 | .83 | 1.28 | 12.61 |