Laytonville, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 5.1 °C (low) to 21.9 °C (high). Annual precipitation averages 1570 Millimeters. Laytonville is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.3 °C | 12.7 °C | 296.42 mm |
| February | 1.3 °C | 14.1 °C | 244.6 mm |
| March | 2.1 °C | 16 °C | 213.11 mm |
| April | 3.3 °C | 18.9 °C | 113.79 mm |
| May | 5.6 °C | 23.3 °C | 48.51 mm |
| June | 8.7 °C | 28.3 °C | 20.32 mm |
| July | 10.8 °C | 33.2 °C | 1.02 mm |
| August | 10.2 °C | 33.2 °C | 1.78 mm |
| September | 8.5 °C | 30.7 °C | 10.16 mm |
| October | 5.2 °C | 24.2 °C | 84.33 mm |
| November | 2.8 °C | 16.3 °C | 166.88 mm |
| December | 0.8 °C | 11.9 °C | 369.06 mm |
| Annual | 5.1 °C | 21.9 °C | 1569.98 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |