| 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 |
| 1990 Hardiness Zone: | Zone 9b: 25F to 30F |
| Average First Frost Date: | No Frost |
| Average Last Frost Date: | No Frost |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate |
| Ecoregion: | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 95012 - Castroville, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 40 | 43 | 44 | 45 | 48 | 50 | 53 | 54 | 53 | 49 | 43 | 39 | 47 |
| Avg Max Temp (°F) | 61 | 63 | 64 | 67 | 68 | 71 | 71 | 72 | 73 | 72 | 66 | 61 | 67 |
| Avg Precip (In.) | 3.24 | 2.93 | 3 | 1.16 | .37 | .12 | .04 | .07 | .23 | .78 | 1.95 | 2.19 | 16.08 |