| 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: | 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 94563 - Orinda, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 38 | 41 | 42 | 44 | 48 | 52 | 54 | 55 | 53 | 49 | 43 | 38 | 46 |
| Avg Max Temp (°F) | 54 | 59 | 62 | 67 | 71 | 76 | 80 | 81 | 79 | 73 | 62 | 54 | 68 |
| Avg Precip (In.) | 5.42 | 4.96 | 3.96 | 1.71 | .87 | .15 | .07 | .08 | .32 | 1.43 | 3.35 | 3.82 | 26.14 |