Walker, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 38.5 °F (low) to 56.3 °F (high). Annual precipitation averages 39.1 Inches. Walker is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.1 °F | 29.8 °F | 2.93 in. |
| February | 17.5 °F | 32.3 °F | 2.27 in. |
| March | 24.6 °F | 42.5 °F | 2.45 in. |
| April | 35.4 °F | 55.4 °F | 3.93 in. |
| May | 46.6 °F | 67.1 °F | 4.13 in. |
| June | 56.3 °F | 76.7 °F | 3.78 in. |
| July | 60.1 °F | 80.5 °F | 3.37 in. |
| August | 58.8 °F | 79.1 °F | 3.3 in. |
| September | 51.1 °F | 72.4 °F | 3.27 in. |
| October | 40.5 °F | 59.3 °F | 3.75 in. |
| November | 31.2 °F | 45.9 °F | 3.19 in. |
| December | 23.3 °F | 34.9 °F | 2.73 in. |
| Annual | 38.5 °F | 56.3 °F | 39.1 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |