Longville, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 29.7 °F (low) to 50.2 °F (high). Annual precipitation averages 27.5 Inches. 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 | -1.8 °F | 17.9 °F | 0.71 in. |
| February | 1.0 °F | 23.8 °F | 0.71 in. |
| March | 14.8 °F | 36.8 °F | 1.24 in. |
| April | 28.7 °F | 51.2 °F | 2.1 in. |
| May | 41.8 °F | 64.7 °F | 3.24 in. |
| June | 52.3 °F | 73.5 °F | 4.21 in. |
| July | 57.1 °F | 77.8 °F | 4.13 in. |
| August | 54.6 °F | 76.2 °F | 3.29 in. |
| September | 46.1 °F | 67.9 °F | 3.04 in. |
| October | 34.2 °F | 52.9 °F | 2.71 in. |
| November | 21.1 °F | 36.6 °F | 1.23 in. |
| December | 7.0 °F | 23.2 °F | 0.93 in. |
| Annual | 29.7 °F | 50.2 °F | 27.54 in. |
| 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 : -35°F to -30°F |
| Plant Hardiness Zone - 2012 | Zone 3b : -35°F to -30°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |