| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 8a: 10°F to 15°F Zone 7b: 5°F to 10°F |
| 2012 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 8a: 10°F to 15°F Zone 7b: 5°F to 10°F |
| 1990 Hardiness Zone: | Zone 8a: 10F to 15F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | Jun. 21 - Jun. 30 |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate |
| Ecoregion: | |
| Heat Zone Days: | 31 - 45 days Over 86°F |
Annual Climate Data for ZIP Code 95936 - Downieville, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 28 | 28 | 30 | 33 | 39 | 46 | 51 | 50 | 46 | 40 | 32 | 28 | 38 |
| Avg Max Temp (°F) | 47 | 49 | 53 | 59 | 68 | 77 | 85 | 84 | 79 | 68 | 53 | 47 | 64 |
| Avg Precip (In.) | 11.33 | 11.08 | 9.76 | 4.58 | 3.06 | .98 | .35 | .46 | 1.57 | 3.81 | 8.33 | 8.72 | 64.02 |