Gully, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -1.8 °C (low) to 9.7 °C (high). Annual precipitation averages 621.3 Millimeters. Gully is located in USDA Plant Hardiness Zone 3b. 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 | -19.8 °C | -9 °C | 18.54 mm |
| February | -18.2 °C | -6.1 °C | 15.49 mm |
| March | -10.2 °C | 1.4 °C | 22.86 mm |
| April | -2 °C | 10.3 °C | 35.05 mm |
| May | 5.3 °C | 18.2 °C | 75.69 mm |
| June | 11.6 °C | 23.3 °C | 107.95 mm |
| July | 13.6 °C | 25.8 °C | 89.15 mm |
| August | 12.1 °C | 25.2 °C | 77.22 mm |
| September | 7.3 °C | 20.2 °C | 72.9 mm |
| October | 0.8 °C | 11.5 °C | 58.42 mm |
| November | -7.2 °C | 1.8 °C | 24.64 mm |
| December | -15.1 °C | -5.7 °C | 23.37 mm |
| Annual | -1.8 °C | 9.7 °C | 621.28 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 3b : -37.2°C to -34.4°C |
| Plant Hardiness Zone - 2012 | Zone 3b : -37.2°C to -34.4°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |