| 2023 Hardiness Zone: | Zone 10b: 35°F to 40°F Zone 10a: 30°F to 35°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: | BSk - Cold Semi-Arid Climate | |
| Ecoregion: | ||
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 8 - 14 days Over 86°F |
Annual Climate Data for ZIP Code 92683 - Westminster, 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 | 51 | 46 | 55 |
| Avg Max Temp (°F) | 67 | 67 | 68 | 71 | 72 | 76 | 80 | 81 | 80 | 77 | 71 | 67 | 73 |
| Avg Precip (In.) | 2.9 | 2.96 | 2.52 | .69 | .24 | .08 | .02 | .12 | .29 | .37 | 1.12 | 1.69 | 13 |