Millerville, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Annual precipitation averages 673.4 Millimeters. Millerville is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -17.4 °C | -7.4 °C | 17.78 mm |
| February | -15.5 °C | -4.6 °C | 16.26 mm |
| March | -8.3 °C | 2.3 °C | 29.21 mm |
| April | -0.5 °C | 11.3 °C | 53.59 mm |
| May | 7 °C | 18.8 °C | 82.3 mm |
| June | 12.9 °C | 24.1 °C | 113.28 mm |
| July | 15.5 °C | 26.6 °C | 102.36 mm |
| August | 13.9 °C | 25.6 °C | 84.84 mm |
| September | 9.3 °C | 21.3 °C | 65.28 mm |
| October | 1.9 °C | 12.7 °C | 64.77 mm |
| November | -5.6 °C | 3.3 °C | 23.37 mm |
| December | -12.9 °C | -4.3 °C | 20.32 mm |
| Annual | 0 °C | 10.8 °C | 673.36 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 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 | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |