| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 9a: 20°F to 25°F Zone 10a: 30°F to 35°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 9a: 20F to 25F |
| Average First Frost Date: | Jan. 11 - Jan. 20 |
| Average Last Frost Date: | Jan. 21 - Jan. 31 |
| 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 95973 - Chico, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 36 | 39 | 42 | 45 | 51 | 58 | 61 | 59 | 56 | 48 | 41 | 36 | 48 |
| Avg Max Temp (°F) | 54 | 60 | 64 | 71 | 79 | 87 | 93 | 92 | 88 | 78 | 63 | 55 | 74 |
| Avg Precip (In.) | 5.31 | 4.66 | 4.14 | 1.7 | 1.1 | .4 | .05 | .16 | .52 | 1.4 | 3.18 | 3.9 | 26.51 |