| 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: | 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: | 31 - 45 days Over 86°F |
Annual Climate Data for ZIP Code 90242 - Downey, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 47 | 48 | 50 | 53 | 57 | 60 | 64 | 65 | 63 | 58 | 51 | 46 | 55 |
| Avg Max Temp (°F) | 68 | 68 | 69 | 72 | 74 | 78 | 82 | 84 | 82 | 78 | 73 | 68 | 75 |
| Avg Precip (In.) | 3.16 | 3.58 | 2.76 | .72 | .23 | .08 | .03 | .14 | .25 | .37 | 1.15 | 1.81 | 14.3 |