| 2023 Hardiness Zone: | Zone 9b: 25°F to 30°F Zone 10a: 30°F to 35°F |
| 2012 Hardiness Zone: | Zone 10b: 35°F to 40°F Zone 9b: 25°F to 30°F Zone 10a: 30°F to 35°F |
| 1990 Hardiness Zone: | Zone 10a: 30F to 35F |
| Average First Frost Date: | Jan. 21 - Jan. 31 |
| Average Last Frost Date: | Jan. 21 - Jan. 31 |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate |
| Ecoregion: | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 94019 - Half Moon Bay, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 42 | 43 | 44 | 44 | 47 | 50 | 52 | 53 | 52 | 49 | 45 | 42 | 47 |
| Avg Max Temp (°F) | 58 | 60 | 61 | 63 | 65 | 68 | 70 | 70 | 71 | 69 | 63 | 58 | 65 |
| Avg Precip (In.) | 5.75 | 5.25 | 4.63 | 1.87 | .8 | .27 | .15 | .29 | .44 | 1.77 | 3.72 | 4.25 | 29.19 |