| 2023 Hardiness Zone: | Zone 10b: 35°F to 40°F Zone 9b: 25°F to 30°F Zone 10a: 30°F to 35°F |
| 2012 Hardiness Zone: | Zone 9b: 25°F to 30°F Zone 10a: 30°F to 35°F |
| 1990 Hardiness Zone: | Zone 10b: 35F to 40F |
| Average First Frost Date: | Jan. 21 - Jan. 31 |
| 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 91352 - Sun Valley, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 43 | 45 | 46 | 49 | 53 | 57 | 61 | 62 | 59 | 54 | 46 | 43 | 51 |
| Avg Max Temp (°F) | 67 | 69 | 70 | 75 | 77 | 83 | 90 | 91 | 88 | 82 | 73 | 68 | 78 |
| Avg Precip (In.) | 3.78 | 4.31 | 3.73 | .93 | .33 | .09 | .02 | .17 | .29 | .53 | 1.24 | 2.11 | 17.53 |