Dillon Beach, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 8.4 °C (low) to 15.5 °C (high). Annual precipitation averages 895.1 Millimeters. Dillon Beach is located in USDA Plant Hardiness Zone 10a. The growing season typically runs from the last frost around Jan. 21 - Jan. 31 through the first frost around Jan. 11 - Jan. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 6.3 °C | 13.6 °C | 171.7 mm |
| February | 6.7 °C | 14.3 °C | 176.28 mm |
| March | 7.1 °C | 14.7 °C | 119.13 mm |
| April | 7.3 °C | 14 °C | 58.67 mm |
| May | 8.4 °C | 15.2 °C | 34.54 mm |
| June | 9.8 °C | 15.4 °C | 8.89 mm |
| July | 10.5 °C | 16.4 °C | 1.02 mm |
| August | 10.9 °C | 17.4 °C | 3.3 mm |
| September | 10.3 °C | 17.6 °C | 4.06 mm |
| October | 9.4 °C | 17.2 °C | 42.67 mm |
| November | 7.8 °C | 16 °C | 95 mm |
| December | 6.2 °C | 13.6 °C | 179.83 mm |
| Annual | 8.4 °C | 15.5 °C | 895.09 mm |
| Average First Frost Date | Jan. 11 - Jan. 20 |
| Average Last Frost Date | Jan. 21 - Jan. 31 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 10a : -1.1°C to 1.7°C |
| Plant Hardiness Zone - 2012 | Zone 9b : -3.9°C to -1.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |