| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 9a: 20°F to 25°F Zone 8a: 10°F to 15°F Zone 9b: 25°F to 30°F |
| 2012 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 9a: 20°F to 25°F Zone 8a: 10°F to 15°F Zone 9b: 25°F to 30°F |
| 1990 Hardiness Zone: | Zone 8b: 15F to 20F |
| Average First Frost Date: | Nov. 21 - Nov. 30 |
| Average Last Frost Date: | Apr. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Csa - Hot-Summer Mediterranean Climate |
| Ecoregion: | |
| Heat Zone Days: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 95423 - Clearlake Oaks, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 34 | 36 | 38 | 40 | 46 | 52 | 57 | 56 | 52 | 45 | 38 | 33 | 44 |
| Avg Max Temp (°F) | 54 | 56 | 62 | 67 | 74 | 83 | 91 | 91 | 85 | 76 | 61 | 54 | 71 |
| Avg Precip (In.) | 6.18 | 5.65 | 4.48 | 1.56 | .91 | .23 | .07 | .09 | .4 | 1.49 | 3.78 | 4.54 | 29.37 |