| 2023 Hardiness Zone: | Zone 9b: 25°F to 30°F 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: | Jan. 21 - Jan. 31 | |
| 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: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 92003 - Bonsall, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 44 | 45 | 47 | 50 | 54 | 57 | 61 | 62 | 61 | 55 | 48 | 44 | 52 |
| Avg Max Temp (°F) | 67 | 68 | 70 | 72 | 74 | 78 | 83 | 84 | 83 | 78 | 73 | 68 | 75 |
| Avg Precip (In.) | 3.03 | 2.58 | 2.66 | .91 | .24 | .14 | .05 | .11 | .28 | .42 | 1.25 | 1.56 | 13.21 |