| 2023 Hardiness Zone: | Zone 9b: 25°F to 30°F |
| 2012 Hardiness Zone: | Zone 9b: 25°F to 30°F |
| 1990 Hardiness Zone: | Zone 9b: 25F to 30F |
| Average First Frost Date: | Dec. 11 - Dec. 20 |
| Average Last Frost Date: | Feb. 1 - Feb. 10 |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate |
| Ecoregion: | |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 94548 - Knightsen, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 38 | 41 | 44 | 47 | 52 | 56 | 58 | 58 | 56 | 51 | 43 | 37 | 49 |
| Avg Max Temp (°F) | 54 | 60 | 65 | 72 | 79 | 85 | 90 | 90 | 86 | 78 | 64 | 55 | 73 |
| Avg Precip (In.) | 2.83 | 2.55 | 2.19 | .78 | .5 | .1 | .03 | .04 | .24 | .79 | 1.69 | 1.92 | 13.68 |