Rancho Calaveras, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 47.9 °F (low) to 75.3 °F (high). Annual precipitation averages 22.3 Inches. Rancho Calaveras is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Jan. 21 - Jan. 31 through the first frost around Dec. 21 - Dec. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 37.9 °F | 56.2 °F | 4.08 in. |
| February | 39.8 °F | 61.0 °F | 3.62 in. |
| March | 42.2 °F | 65.8 °F | 3.42 in. |
| April | 44.4 °F | 71.1 °F | 2.1 in. |
| May | 49.6 °F | 79.9 °F | 1.1 in. |
| June | 54.7 °F | 89.0 °F | 0.3 in. |
| July | 59.1 °F | 95.6 °F | 0.08 in. |
| August | 60.8 °F | 94.5 °F | 0.24 in. |
| September | 58.0 °F | 89.5 °F | 0.16 in. |
| October | 49.2 °F | 79.0 °F | 1.05 in. |
| November | 42.1 °F | 65.5 °F | 2.14 in. |
| December | 37.5 °F | 56.6 °F | 4.0 in. |
| Annual | 47.9 °F | 75.3 °F | 22.29 in. |
| Average First Frost Date | Dec. 21 - Dec. 31 |
| Average Last Frost Date | Jan. 21 - Jan. 31 |
| Average Days With Frost | 10-20 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 |