| 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 10b: 35°F to 40°F 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: | Dec. 21 - Dec. 31 | |
| Average Last Frost Date: | Feb. 1 - Feb. 10 | |
| Koppen-Geiger Climate Zone: | BSk - Cold Semi-Arid Climate | |
| Ecoregion: | ||
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 8 - 14 days Over 86°F |
Annual Climate Data for ZIP Code 92028 - Fallbrook, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 43 | 44 | 46 | 48 | 53 | 56 | 60 | 62 | 59 | 54 | 46 | 42 | 51 |
| Avg Max Temp (°F) | 67 | 68 | 70 | 72 | 75 | 80 | 85 | 86 | 84 | 79 | 73 | 68 | 76 |
| Avg Precip (In.) | 2.99 | 2.71 | 2.77 | .93 | .32 | .15 | .04 | .15 | .3 | .44 | 1.21 | 1.71 | 13.72 |