Millerville, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 32.1 °F (low) to 51.4 °F (high). Annual precipitation averages 26.5 Inches. 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 | 0.6 °F | 18.6 °F | 0.7 in. |
| February | 4.1 °F | 23.7 °F | 0.64 in. |
| March | 17.0 °F | 36.1 °F | 1.15 in. |
| April | 31.1 °F | 52.3 °F | 2.11 in. |
| May | 44.6 °F | 65.9 °F | 3.24 in. |
| June | 55.3 °F | 75.3 °F | 4.46 in. |
| July | 59.9 °F | 79.8 °F | 4.03 in. |
| August | 57.1 °F | 78.1 °F | 3.34 in. |
| September | 48.7 °F | 70.3 °F | 2.57 in. |
| October | 35.5 °F | 54.9 °F | 2.55 in. |
| November | 22.0 °F | 37.9 °F | 0.92 in. |
| December | 8.7 °F | 24.3 °F | 0.8 in. |
| Annual | 32.1 °F | 51.4 °F | 26.51 in. |
| 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 : -30°F to -25°F |
| Plant Hardiness Zone - 2012 | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |