| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 9a: 20°F to 25°F Zone 8a: 10°F to 15°F |
| 2012 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 8a: 10°F to 15°F |
| 1990 Hardiness Zone: | Zone 8a: 10F to 15F |
| Average First Frost Date: | Oct. 21 - Oct. 31 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | Csa - Hot-Summer Mediterranean Climate |
| Ecoregion: | |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 95383 - Twain Harte, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 30 | 31 | 33 | 37 | 43 | 49 | 54 | 53 | 49 | 41 | 33 | 29 | 40 |
| Avg Max Temp (°F) | 51 | 54 | 57 | 63 | 71 | 80 | 88 | 88 | 82 | 71 | 58 | 51 | 68 |
| Avg Precip (In.) | 8.37 | 7.96 | 7.05 | 3.4 | 1.64 | .61 | .14 | .18 | .9 | 2.35 | 5.42 | 5.99 | 44.01 |