Wrenshall, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 29.8 °F (low) to 51 °F (high). Annual precipitation averages 31.5 Inches. Wrenshall 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 | 0.9 °F | 20.3 °F | 0.87 in. |
| February | 4.4 °F | 25.8 °F | 0.87 in. |
| March | 16.0 °F | 37.5 °F | 1.41 in. |
| April | 28.0 °F | 50.0 °F | 2.49 in. |
| May | 38.5 °F | 63.7 °F | 3.56 in. |
| June | 48.3 °F | 73.0 °F | 4.59 in. |
| July | 55.1 °F | 78.6 °F | 4.28 in. |
| August | 54.0 °F | 77.0 °F | 3.8 in. |
| September | 46.3 °F | 68.5 °F | 3.43 in. |
| October | 34.7 °F | 54.3 °F | 3.05 in. |
| November | 22.6 °F | 38.3 °F | 1.77 in. |
| December | 9.1 °F | 25.3 °F | 1.39 in. |
| Annual | 29.8 °F | 51 °F | 31.51 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 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 | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |