| 2023 Hardiness Zone: | Zone 9b: 25°F to 30°F Zone 10a: 30°F to 35°F |
| 2012 Hardiness Zone: | 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: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 94074 - San Gregorio, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 41 | 42 | 43 | 44 | 47 | 49 | 51 | 52 | 50 | 46 | 43 | 40 | 46 |
| Avg Max Temp (°F) | 60 | 60 | 61 | 63 | 65 | 68 | 70 | 71 | 72 | 70 | 64 | 60 | 65 |
| Avg Precip (In.) | 5.4 | 5.06 | 4.38 | 1.83 | .8 | .25 | .12 | .16 | .37 | 1.57 | 3.63 | 4 | 27.58 |