| 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. 1 - Dec. 10 |
| Average Last Frost Date: | Feb. 21 - Feb. 29 |
| 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 94588 - Pleasanton, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 38 | 41 | 43 | 44 | 49 | 52 | 55 | 56 | 54 | 49 | 43 | 38 | 47 |
| Avg Max Temp (°F) | 55 | 60 | 64 | 69 | 75 | 82 | 87 | 86 | 83 | 76 | 63 | 56 | 71 |
| Avg Precip (In.) | 3.8 | 3.53 | 2.84 | 1.23 | .64 | .1 | .04 | .07 | .24 | 1.01 | 2.23 | 2.6 | 18.34 |