| 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 9b: 25F to 30F |
| Average First Frost Date: | Dec. 11 - Dec. 20 |
| Average Last Frost Date: | Feb. 11 - Feb. 20 |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate |
| Ecoregion: | |
| Heat Zone Days: | 46 - 60 days Over 86°F |
Annual Climate Data for ZIP Code 94566 - Pleasanton, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 38 | 41 | 42 | 44 | 48 | 52 | 55 | 55 | 53 | 49 | 42 | 37 | 46 |
| Avg Max Temp (°F) | 56 | 61 | 65 | 71 | 76 | 83 | 88 | 88 | 85 | 77 | 64 | 56 | 73 |
| Avg Precip (In.) | 3.32 | 3.14 | 2.58 | 1.08 | .47 | .1 | .04 | .07 | .24 | .92 | 1.94 | 2.31 | 16.21 |