| 2023 Hardiness Zone: | Zone 10b: 35°F to 40°F Zone 10a: 30°F to 35°F | |
| 2012 Hardiness Zone: | Zone 10a: 30°F to 35°F | |
| 1990 Hardiness Zone: | Zone 10a: 30F to 35F | |
| Average First Frost Date: | No Frost | |
| Average Last Frost Date: | No Frost | |
| 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 92782 - Tustin, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 43 | 45 | 46 | 49 | 54 | 57 | 61 | 62 | 60 | 54 | 47 | 42 | 52 |
| Avg Max Temp (°F) | 68 | 69 | 69 | 73 | 75 | 80 | 85 | 86 | 84 | 80 | 73 | 68 | 76 |
| Avg Precip (In.) | 2.99 | 3.1 | 2.71 | .77 | .26 | .09 | .02 | .14 | .33 | .4 | 1.15 | 1.75 | 13.71 |