| 2023 Hardiness Zone: | 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: | Rare Over 86°F |
Annual Climate Data for ZIP Code 92620 - Irvine, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 42 | 44 | 46 | 48 | 53 | 57 | 61 | 61 | 59 | 54 | 46 | 42 | 51 |
| Avg Max Temp (°F) | 67 | 69 | 69 | 73 | 75 | 80 | 85 | 86 | 84 | 80 | 73 | 68 | 76 |
| Avg Precip (In.) | 3.06 | 3.16 | 2.79 | .8 | .26 | .1 | .01 | .14 | .33 | .4 | 1.21 | 1.82 | 14.08 |