Plumas Lake, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 48.7 °F (low) to 74.9 °F (high). Annual precipitation averages 20.9 Inches. 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 | 38.6 °F | 55.5 °F | 4.11 in. |
| February | 40.9 °F | 60.9 °F | 3.77 in. |
| March | 43.8 °F | 66.1 °F | 3.05 in. |
| April | 46.3 °F | 71.9 °F | 1.57 in. |
| May | 52.3 °F | 80.5 °F | 0.94 in. |
| June | 57.5 °F | 88.5 °F | 0.23 in. |
| July | 60.5 °F | 94.3 °F | 0.0 in. |
| August | 59.3 °F | 93.2 °F | 0.05 in. |
| September | 56.3 °F | 88.8 °F | 0.13 in. |
| October | 49.5 °F | 78.8 °F | 0.97 in. |
| November | 41.9 °F | 64.8 °F | 2.14 in. |
| December | 37.9 °F | 55.7 °F | 3.93 in. |
| Annual | 48.7 °F | 74.9 °F | 20.89 in. |
| 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 : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 9b : 25°F to 20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |