| 2023 Hardiness Zone: | Zone 9b: 25°F to 30°F |
| 2012 Hardiness Zone: | Zone 9b: 25°F to 30°F |
| 1990 Hardiness Zone: | Zone 9a: 20F to 25F |
| Average First Frost Date: | Dec. 1 - Dec. 10 |
| Average Last Frost Date: | Feb. 21 - Feb. 29 |
| 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 95948 - Gridley, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 37 | 41 | 44 | 47 | 53 | 59 | 62 | 60 | 56 | 49 | 42 | 37 | 49 |
| Avg Max Temp (°F) | 54 | 61 | 66 | 73 | 82 | 90 | 95 | 94 | 89 | 79 | 64 | 55 | 75 |
| Avg Precip (In.) | 4.75 | 4.28 | 3.83 | 1.49 | .89 | .31 | .05 | .12 | .43 | 1.32 | 3 | 3.54 | 24 |