| 2023 Hardiness Zone: | Zone 10b: 35°F to 40°F Zone 8b: 15°F to 20°F Zone 10a: 30°F to 35°F Zone 9b: 25°F to 30°F Zone 9a: 20°F to 25°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: | Dec. 11 - Dec. 20 |
| Average Last Frost Date: | Mar. 1 - Mar. 10 |
| Koppen-Geiger Climate Zone: | BSk - Cold Semi-Arid Climate |
| Ecoregion: | |
| Heat Zone Days: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 92883 - Corona, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 37 | 38 | 40 | 43 | 48 | 53 | 57 | 58 | 55 | 48 | 40 | 36 | 46 |
| Avg Max Temp (°F) | 63 | 65 | 67 | 73 | 79 | 87 | 94 | 95 | 89 | 80 | 70 | 63 | 77 |
| Avg Precip (In.) | 3.42 | 3.52 | 2.52 | .83 | .28 | .06 | .03 | .24 | .3 | .41 | 1.22 | 1.94 | 14.77 |