Amador City, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 47.4 °F (low) to 73.2 °F (high). Annual precipitation averages 29.6 Inches. 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 | 37.6 °F | 55.7 °F | 5.5 in. |
| February | 39.2 °F | 59.2 °F | 5.06 in. |
| March | 41.7 °F | 63.4 °F | 4.53 in. |
| April | 43.8 °F | 67.8 °F | 2.69 in. |
| May | 48.7 °F | 76.9 °F | 1.65 in. |
| June | 54.4 °F | 86.7 °F | 0.32 in. |
| July | 58.8 °F | 93.5 °F | 0.01 in. |
| August | 59.1 °F | 92.4 °F | 0.05 in. |
| September | 56.5 °F | 87.1 °F | 0.22 in. |
| October | 49.4 °F | 76.6 °F | 1.46 in. |
| November | 42.0 °F | 64.0 °F | 2.82 in. |
| December | 37.4 °F | 55.6 °F | 5.25 in. |
| Annual | 47.4 °F | 73.2 °F | 29.56 in. |
| 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 : 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 |