| 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: | |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 90602 - Whittier, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 45 | 47 | 49 | 51 | 55 | 59 | 62 | 63 | 62 | 56 | 49 | 45 | 54 |
| Avg Max Temp (°F) | 68 | 69 | 70 | 74 | 75 | 80 | 85 | 86 | 85 | 80 | 73 | 69 | 76 |
| Avg Precip (In.) | 2.95 | 3.38 | 2.69 | .71 | .26 | .09 | .02 | .12 | .3 | .41 | 1.1 | 1.63 | 13.66 |