Coloma, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 48.8 °F (low) to 73.7 °F (high). Annual precipitation averages 31.4 Inches. Coloma is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 38.6 °F | 55.5 °F | 5.67 in. |
| February | 40.4 °F | 59.5 °F | 5.48 in. |
| March | 43.3 °F | 64.1 °F | 4.68 in. |
| April | 45.5 °F | 69.0 °F | 2.71 in. |
| May | 50.8 °F | 78.0 °F | 1.57 in. |
| June | 56.8 °F | 87.1 °F | 0.36 in. |
| July | 61.1 °F | 94.3 °F | 0.01 in. |
| August | 60.5 °F | 93.1 °F | 0.04 in. |
| September | 57.2 °F | 87.8 °F | 0.23 in. |
| October | 50.6 °F | 77.1 °F | 1.55 in. |
| November | 42.9 °F | 63.9 °F | 3.21 in. |
| December | 38.1 °F | 55.5 °F | 5.84 in. |
| Annual | 48.8 °F | 73.7 °F | 31.35 in. |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| 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 |