Madison, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 9.5 °C (low) to 24.3 °C (high). Annual precipitation averages 561.6 Millimeters. Madison 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 | 3.9 °C | 13.6 °C | 119.89 mm |
| February | 5.2 °C | 16.3 °C | 117.35 mm |
| March | 6.7 °C | 19.1 °C | 76.96 mm |
| April | 8.3 °C | 22.7 °C | 33.78 mm |
| May | 11.2 °C | 27.3 °C | 19.56 mm |
| June | 14 °C | 31.8 °C | 4.32 mm |
| July | 15.3 °C | 34.8 °C | 0 mm |
| August | 14.7 °C | 34.4 °C | 0.76 mm |
| September | 13.7 °C | 32.4 °C | 2.29 mm |
| October | 10.4 °C | 26.5 °C | 21.59 mm |
| November | 6.2 °C | 18.7 °C | 52.32 mm |
| December | 3.8 °C | 13.7 °C | 112.78 mm |
| Annual | 9.5 °C | 24.3 °C | 561.6 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 |