Mokelumne Hill, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 8.2 °C (low) to 22.5 °C (high). Annual precipitation averages 785.1 Millimeters. Mokelumne Hill is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 1 - Feb. 10 through the first frost around Dec. 21 - Dec. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 2.5 °C | 13 °C | 142.75 mm |
| February | 3.4 °C | 14.7 °C | 134.11 mm |
| March | 4.8 °C | 17 °C | 122.94 mm |
| April | 6 °C | 19.3 °C | 71.12 mm |
| May | 8.9 °C | 24.3 °C | 42.67 mm |
| June | 12.2 °C | 29.8 °C | 11.18 mm |
| July | 15.2 °C | 33.8 °C | 1.02 mm |
| August | 15.4 °C | 33 °C | 2.03 mm |
| September | 13.6 °C | 30.1 °C | 5.59 mm |
| October | 9.2 °C | 24.4 °C | 38.86 mm |
| November | 5 °C | 17.4 °C | 72.9 mm |
| December | 2.6 °C | 12.7 °C | 139.95 mm |
| Annual | 8.2 °C | 22.5 °C | 785.12 mm |
| Average First Frost Date | Dec. 21 - Dec. 31 |
| Average Last Frost Date | Feb. 1 - Feb. 10 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°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 |