Walker, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 1.4 °C (low) to 18.8 °C (high). Annual precipitation averages 247.9 Millimeters. 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 | -5.6 °C | 8.2 °C | 43.43 mm |
| February | -4.7 °C | 9.7 °C | 35.31 mm |
| March | -2.2 °C | 12.8 °C | 32.51 mm |
| April | -0.2 °C | 16.3 °C | 14.22 mm |
| May | 3.6 °C | 20.9 °C | 19.05 mm |
| June | 7.2 °C | 26.9 °C | 11.94 mm |
| July | 9.8 °C | 31.8 °C | 9.91 mm |
| August | 10.5 °C | 31.2 °C | 8.13 mm |
| September | 6.6 °C | 26.9 °C | 5.59 mm |
| October | 1.4 °C | 20.3 °C | 14.48 mm |
| November | -3.3 °C | 12.9 °C | 21.34 mm |
| December | -5.9 °C | 7.9 °C | 32 mm |
| Annual | 1.4 °C | 18.8 °C | 247.91 mm |
| 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 : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |