Placerville, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 8.8 °C (low) to 21.4 °C (high). Annual precipitation averages 991.4 Millimeters. Placerville is located in USDA Plant Hardiness Zone 9b. 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 | 2.9 °C | 12.3 °C | 177.8 mm |
| February | 3.8 °C | 13.7 °C | 175.51 mm |
| March | 4.8 °C | 15.8 °C | 155.7 mm |
| April | 6.2 °C | 18.1 °C | 83.06 mm |
| May | 9.4 °C | 22.8 °C | 57.4 mm |
| June | 13 °C | 28.2 °C | 12.45 mm |
| July | 16.5 °C | 32.6 °C | 0.76 mm |
| August | 16.4 °C | 32.3 °C | 1.27 mm |
| September | 14.1 °C | 29.6 °C | 7.87 mm |
| October | 10.1 °C | 23.7 °C | 51.05 mm |
| November | 5.4 °C | 16.3 °C | 93.47 mm |
| December | 2.7 °C | 11.9 °C | 175.01 mm |
| Annual | 8.8 °C | 21.4 °C | 991.35 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 9b : -3.9°C to -1.1°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |