Wallace, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 9 °C (low) to 23.8 °C (high). Annual precipitation averages 541.3 Millimeters. Wallace is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Feb. 11 - Feb. 20 through the first frost around Dec. 11 - Dec. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.6 °C | 13.3 °C | 101.35 mm |
| February | 4.8 °C | 16.2 °C | 91.19 mm |
| March | 6.3 °C | 19 °C | 82.04 mm |
| April | 7.7 °C | 21.5 °C | 48.26 mm |
| May | 10.4 °C | 26.7 °C | 23.11 mm |
| June | 13.1 °C | 31.4 °C | 5.08 mm |
| July | 14.9 °C | 34.4 °C | 1.27 mm |
| August | 14.9 °C | 33.9 °C | 4.06 mm |
| September | 13.5 °C | 31.6 °C | 2.79 mm |
| October | 9.7 °C | 26.2 °C | 25.65 mm |
| November | 5.6 °C | 18.4 °C | 53.59 mm |
| December | 3.3 °C | 13.4 °C | 102.87 mm |
| Annual | 9 °C | 23.8 °C | 541.26 mm |
| Average First Frost Date | Dec. 11 - Dec. 20 |
| Average Last Frost Date | Feb. 11 - Feb. 20 |
| 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 |