Walker, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 34.6 °F (low) to 65.9 °F (high). Annual precipitation averages 9.8 Inches. Walker is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep.1 - Sep. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 21.9 °F | 46.7 °F | 1.71 in. |
| February | 23.5 °F | 49.4 °F | 1.39 in. |
| March | 28.0 °F | 55.1 °F | 1.28 in. |
| April | 31.6 °F | 61.3 °F | 0.56 in. |
| May | 38.4 °F | 69.7 °F | 0.75 in. |
| June | 45.0 °F | 80.4 °F | 0.47 in. |
| July | 49.7 °F | 89.2 °F | 0.39 in. |
| August | 50.9 °F | 88.2 °F | 0.32 in. |
| September | 43.8 °F | 80.5 °F | 0.22 in. |
| October | 34.5 °F | 68.5 °F | 0.57 in. |
| November | 26.1 °F | 55.3 °F | 0.84 in. |
| December | 21.4 °F | 46.2 °F | 1.26 in. |
| Annual | 34.6 °F | 65.9 °F | 9.76 in. |
| Average First Frost Date | Sep.1 - Sep. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |