| 2023 Hardiness Zone: | Zone 10a: 30°F to 35°F | |
| 2012 Hardiness Zone: | Zone 9b: 25°F to 30°F | |
| 1990 Hardiness Zone: | Zone 9b: 25F to 30F | |
| Average First Frost Date: | Nov. 21 - Nov. 30 | |
| Average Last Frost Date: | Feb. 21 - Feb. 29 | |
| 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 92410 - San Bernardino, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 41 | 43 | 44 | 47 | 52 | 57 | 62 | 63 | 60 | 53 | 45 | 40 | 51 |
| Avg Max Temp (°F) | 65 | 67 | 69 | 75 | 80 | 88 | 95 | 95 | 90 | 82 | 72 | 66 | 79 |
| Avg Precip (In.) | 3.43 | 3.6 | 3.18 | .89 | .39 | .1 | .04 | .21 | .4 | .68 | 1.17 | 1.88 | 15.97 |