| 2023 Hardiness Zone: | Zone 10a: 30°F to 35°F | |
| 2012 Hardiness Zone: | Zone 9b: 25°F to 30°F | |
| 1990 Hardiness Zone: | Zone 9b: 25F to 30F | |
| Average First Frost Date: | Jan. 1 - Jan. 10 | |
| Average Last Frost Date: | Jan. 21 - Jan. 31 | |
| Koppen-Geiger Climate Zone: | BSk - Cold Semi-Arid Climate | |
| Ecoregion: | ||
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 92879 - Corona, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 41 | 43 | 45 | 47 | 52 | 56 | 60 | 61 | 59 | 52 | 44 | 40 | 50 |
| Avg Max Temp (°F) | 67 | 69 | 71 | 77 | 80 | 87 | 93 | 93 | 90 | 83 | 74 | 68 | 79 |
| Avg Precip (In.) | 2.77 | 2.93 | 2.34 | .69 | .18 | .02 | .02 | .12 | .23 | .36 | 1.05 | 1.51 | 12.22 |