Wallace, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 48.2 °F (low) to 74.9 °F (high). Annual precipitation averages 21.3 Inches. 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 | 38.5 °F | 55.9 °F | 3.99 in. |
| February | 40.6 °F | 61.1 °F | 3.59 in. |
| March | 43.4 °F | 66.2 °F | 3.23 in. |
| April | 45.8 °F | 70.7 °F | 1.9 in. |
| May | 50.8 °F | 80.0 °F | 0.91 in. |
| June | 55.6 °F | 88.5 °F | 0.2 in. |
| July | 58.8 °F | 94.0 °F | 0.05 in. |
| August | 58.8 °F | 93.1 °F | 0.16 in. |
| September | 56.3 °F | 88.8 °F | 0.11 in. |
| October | 49.4 °F | 79.1 °F | 1.01 in. |
| November | 42.1 °F | 65.2 °F | 2.11 in. |
| December | 37.9 °F | 56.2 °F | 4.05 in. |
| Annual | 48.2 °F | 74.9 °F | 21.31 in. |
| 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 : 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 |