Tuttletown, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 8.4 °C (low) to 23.5 °C (high). Annual precipitation averages 790.7 Millimeters. Tuttletown is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 2.6 °C | 13.4 °C | 158.75 mm |
| February | 3.3 °C | 15.1 °C | 134.62 mm |
| March | 4.8 °C | 17.7 °C | 121.16 mm |
| April | 6.2 °C | 20.2 °C | 68.58 mm |
| May | 9.3 °C | 25.4 °C | 37.08 mm |
| June | 12.8 °C | 30.9 °C | 9.91 mm |
| July | 16.3 °C | 35.1 °C | 1.02 mm |
| August | 15.8 °C | 34.7 °C | 1.78 mm |
| September | 13.5 °C | 31.7 °C | 5.08 mm |
| October | 9.3 °C | 25.6 °C | 38.61 mm |
| November | 5 °C | 18.3 °C | 75.95 mm |
| December | 2.3 °C | 13.4 °C | 138.18 mm |
| Annual | 8.4 °C | 23.5 °C | 790.72 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |