Plumas Lake, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 9.3 °C (low) to 23.9 °C (high). Annual precipitation averages 530.6 Millimeters. Plumas Lake is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Feb. 11 - Feb. 20 through the first frost around Dec. 1 - Dec. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.7 °C | 13.1 °C | 104.39 mm |
| February | 4.9 °C | 16.1 °C | 95.76 mm |
| March | 6.6 °C | 18.9 °C | 77.47 mm |
| April | 7.9 °C | 22.2 °C | 39.88 mm |
| May | 11.3 °C | 26.9 °C | 23.88 mm |
| June | 14.2 °C | 31.4 °C | 5.84 mm |
| July | 15.8 °C | 34.6 °C | 0 mm |
| August | 15.2 °C | 34 °C | 1.27 mm |
| September | 13.5 °C | 31.6 °C | 3.3 mm |
| October | 9.7 °C | 26 °C | 24.64 mm |
| November | 5.5 °C | 18.2 °C | 54.36 mm |
| December | 3.3 °C | 13.2 °C | 99.82 mm |
| Annual | 9.3 °C | 23.9 °C | 530.61 mm |
| Average First Frost Date | Dec. 1 - Dec. 10 |
| Average Last Frost Date | Feb. 11 - Feb. 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 | Abnormally Dry |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |