Rancho Calaveras, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 8.9 °C (low) to 24.1 °C (high). Annual precipitation averages 566.2 Millimeters. 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 | 3.3 °C | 13.4 °C | 103.63 mm |
| February | 4.3 °C | 16.1 °C | 91.95 mm |
| March | 5.7 °C | 18.8 °C | 86.87 mm |
| April | 6.9 °C | 21.7 °C | 53.34 mm |
| May | 9.8 °C | 26.6 °C | 27.94 mm |
| June | 12.6 °C | 31.7 °C | 7.62 mm |
| July | 15.1 °C | 35.3 °C | 2.03 mm |
| August | 16 °C | 34.7 °C | 6.1 mm |
| September | 14.4 °C | 31.9 °C | 4.06 mm |
| October | 9.6 °C | 26.1 °C | 26.67 mm |
| November | 5.6 °C | 18.6 °C | 54.36 mm |
| December | 3.1 °C | 13.7 °C | 101.6 mm |
| Annual | 8.9 °C | 24.1 °C | 566.17 mm |
| 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 : -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 |