| 2023 Hardiness Zone: | Zone 10a: 30°F to 35°F |
| 2012 Hardiness Zone: | Zone 10a: 30°F to 35°F |
| 1990 Hardiness Zone: | Zone 9b: 25F to 30F |
| Average First Frost Date: | Dec. 21 - Dec. 31 |
| Average Last Frost Date: | Feb. 1 - Feb. 10 |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate |
| Ecoregion: | |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 94065 - Redwood City, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 41 | 43 | 45 | 46 | 50 | 53 | 55 | 55 | 54 | 50 | 45 | 40 | 48 |
| Avg Max Temp (°F) | 58 | 61 | 64 | 68 | 71 | 75 | 77 | 78 | 77 | 73 | 64 | 58 | 69 |
| Avg Precip (In.) | 4.1 | 3.84 | 3.25 | 1.11 | .46 | .11 | .04 | .09 | .23 | 1.07 | 2.55 | 2.89 | 19.73 |