Placerville, Idaho has a Humid Continental Climate - Dry Warm Summer climate (Köppen classification: Dsa). Average annual temperatures range from -0.4 °C (low) to 15.4 °C (high). Annual precipitation averages 661.9 Millimeters. Placerville is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.4 °C | 2.4 °C | 96.27 mm |
| February | -7.3 °C | 5.5 °C | 69.85 mm |
| March | -4.3 °C | 9.5 °C | 68.83 mm |
| April | -2 °C | 13.8 °C | 57.66 mm |
| May | 2 °C | 19.1 °C | 59.44 mm |
| June | 5.1 °C | 24 °C | 34.8 mm |
| July | 9.7 °C | 30.8 °C | 11.43 mm |
| August | 9 °C | 30.3 °C | 10.92 mm |
| September | 4.8 °C | 24.6 °C | 20.32 mm |
| October | -0.8 °C | 16.1 °C | 45.97 mm |
| November | -4.5 °C | 7.3 °C | 75.95 mm |
| December | -8.3 °C | 1.9 °C | 110.49 mm |
| Annual | -0.4 °C | 15.4 °C | 661.93 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dsa - Humid Continental Climate - Dry Warm Summer |