Tuttletown, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 47.2 °F (low) to 74.2 °F (high). Annual precipitation averages 31.1 Inches. 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 | 36.6 °F | 56.2 °F | 6.25 in. |
| February | 37.9 °F | 59.1 °F | 5.3 in. |
| March | 40.7 °F | 63.9 °F | 4.77 in. |
| April | 43.2 °F | 68.3 °F | 2.7 in. |
| May | 48.8 °F | 77.8 °F | 1.46 in. |
| June | 55.1 °F | 87.7 °F | 0.39 in. |
| July | 61.3 °F | 95.2 °F | 0.04 in. |
| August | 60.4 °F | 94.4 °F | 0.07 in. |
| September | 56.3 °F | 89.0 °F | 0.2 in. |
| October | 48.7 °F | 78.0 °F | 1.52 in. |
| November | 41.0 °F | 64.9 °F | 2.99 in. |
| December | 36.2 °F | 56.1 °F | 5.44 in. |
| Annual | 47.2 °F | 74.2 °F | 31.13 in. |
| 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 : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 9a : 20°F to 25°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |