Walker, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 30.2 °F (low) to 49.7 °F (high). Annual precipitation averages 27.6 Inches. Walker is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -1.6 °F | 17.6 °F | 0.7 in. |
| February | 1.3 °F | 23.4 °F | 0.72 in. |
| March | 15.0 °F | 36.2 °F | 1.24 in. |
| April | 29.2 °F | 50.3 °F | 2.14 in. |
| May | 42.3 °F | 63.7 °F | 3.2 in. |
| June | 52.8 °F | 73.0 °F | 4.33 in. |
| July | 57.7 °F | 77.6 °F | 4.21 in. |
| August | 55.2 °F | 76.0 °F | 3.11 in. |
| September | 46.8 °F | 67.1 °F | 3.11 in. |
| October | 34.5 °F | 52.3 °F | 2.73 in. |
| November | 21.5 °F | 36.2 °F | 1.21 in. |
| December | 7.2 °F | 22.8 °F | 0.94 in. |
| Annual | 30.2 °F | 49.7 °F | 27.64 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4a : -30°F to -25°F |
| Plant Hardiness Zone - 2012 | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |