| 2023 Hardiness Zone: | 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 9b: 25F to 30F | |
| Average First Frost Date: | Jan. 1 - Jan. 10 | |
| Average Last Frost Date: | Feb. 11 - Feb. 20 | |
| Koppen-Geiger Climate Zone: | Csa - Hot-Summer Mediterranean Climate | |
| Ecoregion: | ||
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 91381 - Stevenson Ranch, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 40 | 41 | 42 | 44 | 49 | 53 | 57 | 58 | 56 | 50 | 43 | 40 | 48 |
| Avg Max Temp (°F) | 64 | 65 | 68 | 73 | 79 | 87 | 93 | 94 | 89 | 81 | 71 | 65 | 77 |
| Avg Precip (In.) | 4.21 | 4.37 | 3.78 | .88 | .3 | .06 | .02 | .15 | .32 | .59 | 1.45 | 2.39 | 18.53 |