Amador City, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 8.6 °C (low) to 22.9 °C (high). Annual precipitation averages 750.8 Millimeters. Amador City is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Feb. 21 - Feb. 29 through the first frost around Dec. 11 - Dec. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.1 °C | 13.2 °C | 139.7 mm |
| February | 4 °C | 15.1 °C | 128.52 mm |
| March | 5.4 °C | 17.4 °C | 115.06 mm |
| April | 6.6 °C | 19.9 °C | 68.33 mm |
| May | 9.3 °C | 24.9 °C | 41.91 mm |
| June | 12.4 °C | 30.4 °C | 8.13 mm |
| July | 14.9 °C | 34.2 °C | 0.25 mm |
| August | 15.1 °C | 33.6 °C | 1.27 mm |
| September | 13.6 °C | 30.6 °C | 5.59 mm |
| October | 9.7 °C | 24.8 °C | 37.08 mm |
| November | 5.6 °C | 17.8 °C | 71.63 mm |
| December | 3 °C | 13.1 °C | 133.35 mm |
| Annual | 8.6 °C | 22.9 °C | 750.82 mm |
| Average First Frost Date | Dec. 11 - Dec. 20 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| 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 |