| 2023 Hardiness Zone: | Zone 9a: 20°F to 25°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 |
| 1990 Hardiness Zone: | Zone 8b: 15F to 20F |
| Average First Frost Date: | Nov. 11 - Nov. 20 |
| Average Last Frost Date: | Apr. 11 - Apr. 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 95310 - Columbia, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 32 | 34 | 37 | 40 | 45 | 51 | 56 | 55 | 51 | 43 | 36 | 31 | 43 |
| Avg Max Temp (°F) | 54 | 58 | 61 | 68 | 76 | 86 | 93 | 93 | 87 | 76 | 62 | 54 | 72 |
| Avg Precip (In.) | 6.9 | 6.4 | 6.12 | 2.79 | 1.37 | .35 | .08 | .13 | .62 | 2.01 | 4.29 | 4.79 | 35.85 |