Gonzales, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 47 °F (low) to 69.4 °F (high). Annual precipitation averages 11.7 Inches. Gonzales is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Feb. 1 - Feb. 10 through the first frost around Dec. 11 - Dec. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 41.1 °F | 61.7 °F | 2.64 in. |
| February | 42.2 °F | 63.0 °F | 2.45 in. |
| March | 43.6 °F | 65.5 °F | 1.83 in. |
| April | 45.0 °F | 68.0 °F | 0.71 in. |
| May | 48.5 °F | 70.7 °F | 0.35 in. |
| June | 51.0 °F | 73.4 °F | 0.06 in. |
| July | 53.9 °F | 74.0 °F | 0.02 in. |
| August | 54.4 °F | 75.7 °F | 0.02 in. |
| September | 52.5 °F | 77.1 °F | 0.04 in. |
| October | 48.4 °F | 75.2 °F | 0.48 in. |
| November | 43.8 °F | 67.7 °F | 0.96 in. |
| December | 40.1 °F | 61.2 °F | 2.17 in. |
| Annual | 47 °F | 69.4 °F | 11.73 in. |
| Average First Frost Date | Dec. 11 - Dec. 20 |
| Average Last Frost Date | Feb. 1 - Feb. 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 | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |