Longville, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -1.3 °C (low) to 10.1 °C (high). Annual precipitation averages 699.5 Millimeters. Longville is located in USDA Plant Hardiness Zone 3b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -18.8 °C | -7.8 °C | 18.03 mm |
| February | -17.2 °C | -4.6 °C | 18.03 mm |
| March | -9.6 °C | 2.7 °C | 31.5 mm |
| April | -1.8 °C | 10.7 °C | 53.34 mm |
| May | 5.4 °C | 18.2 °C | 82.3 mm |
| June | 11.3 °C | 23.1 °C | 106.93 mm |
| July | 13.9 °C | 25.4 °C | 104.9 mm |
| August | 12.6 °C | 24.6 °C | 83.57 mm |
| September | 7.8 °C | 19.9 °C | 77.22 mm |
| October | 1.2 °C | 11.6 °C | 68.83 mm |
| November | -6.1 °C | 2.6 °C | 31.24 mm |
| December | -13.9 °C | -4.9 °C | 23.62 mm |
| Annual | -1.3 °C | 10.1 °C | 699.51 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 3b : -37.2°C to -34.4°C |
| Plant Hardiness Zone - 2012 | Zone 3b : -37.2°C to -34.4°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |