| 2023 Hardiness Zone: | Zone 10b: 35°F to 40°F | |
| 2012 Hardiness Zone: | Zone 10b: 35°F to 40°F Zone 10a: 30°F to 35°F | |
| 1990 Hardiness Zone: | Zone 10a: 30F to 35F | |
| Average First Frost Date: | Frost Rare | |
| Average Last Frost Date: | Jan. 21 - Jan. 31 | |
| Koppen-Geiger Climate Zone: | Csa - Hot-Summer Mediterranean Climate | |
| Ecoregion: | ||
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 90601 - Whittier, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 44 | 46 | 48 | 50 | 55 | 59 | 62 | 63 | 61 | 56 | 48 | 44 | 53 |
| Avg Max Temp (°F) | 68 | 70 | 70 | 74 | 76 | 81 | 86 | 87 | 86 | 81 | 74 | 69 | 77 |
| Avg Precip (In.) | 3.54 | 3.78 | 3.09 | .86 | .3 | .09 | .02 | .12 | .36 | .49 | 1.2 | 1.88 | 15.71 |