Felton, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 45.7 °F (low) to 72.6 °F (high). Annual precipitation averages 48 Inches. Felton is located in USDA Plant Hardiness Zone 9b. 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 | 39.5 °F | 60.9 °F | 9.27 in. |
| February | 40.9 °F | 62.1 °F | 9.97 in. |
| March | 42.3 °F | 65.0 °F | 6.13 in. |
| April | 43.8 °F | 71.0 °F | 3.28 in. |
| May | 47.0 °F | 75.1 °F | 1.14 in. |
| June | 49.7 °F | 80.1 °F | 0.25 in. |
| July | 52.6 °F | 83.3 °F | 0.02 in. |
| August | 52.6 °F | 84.1 °F | 0.06 in. |
| September | 50.9 °F | 83.9 °F | 0.16 in. |
| October | 47.2 °F | 79.2 °F | 2.15 in. |
| November | 42.7 °F | 66.6 °F | 4.57 in. |
| December | 39.2 °F | 59.8 °F | 11.01 in. |
| Annual | 45.7 °F | 72.6 °F | 48.01 in. |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9b : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 9b : 25°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |