Sonora, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 46.1 °F (low) to 73.5 °F (high). Annual precipitation averages 33.8 Inches. Sonora is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 35.9 °F | 55.9 °F | 6.57 in. |
| February | 36.9 °F | 58.4 °F | 5.88 in. |
| March | 39.6 °F | 63.4 °F | 4.98 in. |
| April | 42.0 °F | 67.4 °F | 3.18 in. |
| May | 47.6 °F | 76.6 °F | 1.67 in. |
| June | 53.9 °F | 86.6 °F | 0.4 in. |
| July | 60.3 °F | 94.3 °F | 0.05 in. |
| August | 59.3 °F | 93.4 °F | 0.1 in. |
| September | 55.2 °F | 88.2 °F | 0.18 in. |
| October | 47.5 °F | 77.0 °F | 1.61 in. |
| November | 39.9 °F | 64.5 °F | 3.16 in. |
| December | 35.3 °F | 55.7 °F | 6.01 in. |
| Annual | 46.1 °F | 73.5 °F | 33.79 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 9a : 20°F to 25°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |