| 2023 Hardiness Zone: | Zone 9b: 25°F to 30°F Zone 8a: 10°F to 15°F Zone 10b: 35°F to 40°F Zone 10a: 30°F to 35°F Zone 8b: 15°F to 20°F Zone 9a: 20°F to 25°F | |
| 2012 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 9a: 20°F to 25°F Zone 10a: 30°F to 35°F Zone 9b: 25°F to 30°F | |
| 1990 Hardiness Zone: | Zone 10a: 30F to 35F | |
| 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: | 31 - 45 days Over 86°F |
Annual Climate Data for ZIP Code 91024 - Sierra Madre, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 42 | 44 | 45 | 48 | 52 | 57 | 61 | 62 | 60 | 54 | 46 | 42 | 51 |
| Avg Max Temp (°F) | 63 | 65 | 67 | 72 | 76 | 83 | 89 | 89 | 86 | 78 | 70 | 64 | 75 |
| Avg Precip (In.) | 4.41 | 4.87 | 4.22 | 1.16 | .51 | .15 | .05 | .18 | .48 | .63 | 1.49 | 2.37 | 20.52 |