| 2023 Hardiness Zone: | Zone 10b: 35°F to 40°F | |
| 2012 Hardiness Zone: | Zone 10b: 35°F to 40°F | |
| 1990 Hardiness Zone: | Zone 10b: 35F to 40F | |
| Average First Frost Date: | No Frost | |
| Average Last Frost Date: | No Frost | |
| Koppen-Geiger Climate Zone: | Csa - Hot-Summer Mediterranean Climate | |
| Ecoregion: | ||
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 46 - 60 days Over 86°F |
Annual Climate Data for ZIP Code 90241 - Downey, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 46 | 48 | 50 | 52 | 57 | 60 | 63 | 64 | 63 | 58 | 50 | 46 | 55 |
| Avg Max Temp (°F) | 68 | 69 | 69 | 73 | 74 | 79 | 83 | 84 | 83 | 79 | 73 | 69 | 75 |
| Avg Precip (In.) | 3.2 | 3.64 | 2.84 | .72 | .23 | .08 | .03 | .14 | .28 | .4 | 1.16 | 1.83 | 14.55 |