Dillon Beach, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 47.1 °F (low) to 59.8 °F (high). Annual precipitation averages 35.2 Inches. 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 | 43.3 °F | 56.5 °F | 6.76 in. |
| February | 44.0 °F | 57.8 °F | 6.94 in. |
| March | 44.7 °F | 58.5 °F | 4.69 in. |
| April | 45.1 °F | 57.2 °F | 2.31 in. |
| May | 47.2 °F | 59.4 °F | 1.36 in. |
| June | 49.7 °F | 59.7 °F | 0.35 in. |
| July | 50.9 °F | 61.6 °F | 0.04 in. |
| August | 51.7 °F | 63.3 °F | 0.13 in. |
| September | 50.5 °F | 63.7 °F | 0.16 in. |
| October | 49.0 °F | 62.9 °F | 1.68 in. |
| November | 46.1 °F | 60.8 °F | 3.74 in. |
| December | 43.1 °F | 56.4 °F | 7.08 in. |
| Annual | 47.1 °F | 59.8 °F | 35.24 in. |
| 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 : 30°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 9b : 25°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |