| 2023 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 Zone 8a: 10°F to 15°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 Zone 8a: 10°F to 15°F | |
| 1990 Hardiness Zone: | Zone 9b: 25F to 30F | |
| Average First Frost Date: | Oct. 11 - Oct. 20 | |
| Average Last Frost Date: | May 1 - May 10 | |
| Koppen-Geiger Climate Zone: | Csa - Hot-Summer Mediterranean Climate | |
| Ecoregion: | ||
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 92407 - San Bernardino, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 34 | 35 | 36 | 39 | 45 | 52 | 58 | 59 | 54 | 46 | 38 | 33 | 44 |
| Avg Max Temp (°F) | 53 | 55 | 59 | 66 | 72 | 81 | 88 | 88 | 82 | 72 | 60 | 53 | 69 |
| Avg Precip (In.) | 7.9 | 8.28 | 7.63 | 1.83 | .92 | .15 | .12 | .29 | .75 | 1.3 | 2.63 | 3.84 | 35.65 |