Felton, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 7.6 °C (low) to 22.5 °C (high). Annual precipitation averages 1219.5 Millimeters. 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 | 4.2 °C | 16.1 °C | 235.46 mm |
| February | 4.9 °C | 16.7 °C | 253.24 mm |
| March | 5.7 °C | 18.3 °C | 155.7 mm |
| April | 6.6 °C | 21.7 °C | 83.31 mm |
| May | 8.3 °C | 23.9 °C | 28.96 mm |
| June | 9.8 °C | 26.7 °C | 6.35 mm |
| July | 11.4 °C | 28.5 °C | 0.51 mm |
| August | 11.4 °C | 28.9 °C | 1.52 mm |
| September | 10.5 °C | 28.8 °C | 4.06 mm |
| October | 8.4 °C | 26.2 °C | 54.61 mm |
| November | 5.9 °C | 19.2 °C | 116.08 mm |
| December | 4 °C | 15.4 °C | 279.65 mm |
| Annual | 7.6 °C | 22.5 °C | 1219.45 mm |
| 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 : -3.9°C to -1.1°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 |