| 2023 Hardiness Zone: | Zone 10a: 30°F to 35°F | |
| 2012 Hardiness Zone: | Zone 10a: 30°F to 35°F | |
| 1990 Hardiness Zone: | Zone 10a: 30F to 35F | |
| Average First Frost Date: | No Frost | |
| Average Last Frost Date: | Frost Rare | |
| 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 91203 - Glendale, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 44 | 46 | 47 | 50 | 54 | 58 | 62 | 62 | 60 | 55 | 48 | 44 | 52 |
| Avg Max Temp (°F) | 67 | 69 | 70 | 74 | 77 | 83 | 89 | 90 | 87 | 81 | 73 | 67 | 77 |
| Avg Precip (In.) | 4.07 | 4.64 | 4.04 | 1.04 | .4 | .14 | .04 | .18 | .38 | .61 | 1.39 | 2.23 | 19.16 |