| 2023 Hardiness Zone: | Zone 9b: 25°F to 30°F |
| 2012 Hardiness Zone: | Zone 9a: 20°F to 25°F Zone 9b: 25°F to 30°F |
| 1990 Hardiness Zone: | Zone 9b: 25F to 30F |
| Average First Frost Date: | Dec. 1 - Dec. 10 |
| Average Last Frost Date: | Mar. 1 - Mar. 10 |
| 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 95901 - Marysville, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 37 | 41 | 45 | 48 | 54 | 59 | 61 | 59 | 56 | 50 | 42 | 37 | 49 |
| Avg Max Temp (°F) | 55 | 61 | 66 | 74 | 82 | 90 | 96 | 95 | 90 | 80 | 64 | 55 | 76 |
| Avg Precip (In.) | 4.29 | 3.89 | 3.51 | 1.41 | .75 | .25 | .07 | .08 | .4 | 1.23 | 2.79 | 3.33 | 22.01 |