Wrenshall, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -1.2 °C (low) to 10.6 °C (high). Annual precipitation averages 800.4 Millimeters. 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 | -17.3 °C | -6.5 °C | 22.1 mm |
| February | -15.3 °C | -3.4 °C | 22.1 mm |
| March | -8.9 °C | 3.1 °C | 35.81 mm |
| April | -2.2 °C | 10 °C | 63.25 mm |
| May | 3.6 °C | 17.6 °C | 90.42 mm |
| June | 9.1 °C | 22.8 °C | 116.59 mm |
| July | 12.8 °C | 25.9 °C | 108.71 mm |
| August | 12.2 °C | 25 °C | 96.52 mm |
| September | 7.9 °C | 20.3 °C | 87.12 mm |
| October | 1.5 °C | 12.4 °C | 77.47 mm |
| November | -5.2 °C | 3.5 °C | 44.96 mm |
| December | -12.7 °C | -3.7 °C | 35.31 mm |
| Annual | -1.2 °C | 10.6 °C | 800.36 mm |
| 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 : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |