Anderson, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 9.1 °C (low) to 24.5 °C (high). Annual precipitation averages 857.5 Millimeters. Anderson is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 2.7 °C | 13.8 °C | 160.27 mm |
| February | 3.9 °C | 16.1 °C | 134.37 mm |
| March | 5.4 °C | 18.6 °C | 118.11 mm |
| April | 7.3 °C | 21.9 °C | 61.47 mm |
| May | 11.1 °C | 27.2 °C | 44.96 mm |
| June | 15.2 °C | 32.6 °C | 28.45 mm |
| July | 17.4 °C | 36.8 °C | 1.78 mm |
| August | 16.2 °C | 35.8 °C | 4.32 mm |
| September | 13.6 °C | 33.1 °C | 10.16 mm |
| October | 9.4 °C | 26.2 °C | 43.69 mm |
| November | 4.8 °C | 18.2 °C | 89.15 mm |
| December | 2.6 °C | 13.3 °C | 160.78 mm |
| Annual | 9.1 °C | 24.5 °C | 857.51 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |