Hill City, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -1.6 °C (low) to 10.4 °C (high). Annual precipitation averages 750.1 Millimeters. Hill City is located in USDA Plant Hardiness Zone 4a. 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 | -18.8 °C | -7.5 °C | 22.61 mm |
| February | -17 °C | -4.1 °C | 18.8 mm |
| March | -9.7 °C | 3.1 °C | 32.77 mm |
| April | -2.2 °C | 10.8 °C | 56.9 mm |
| May | 4.8 °C | 18.4 °C | 84.07 mm |
| June | 10.7 °C | 23.4 °C | 114.3 mm |
| July | 13.2 °C | 25.8 °C | 108.2 mm |
| August | 11.8 °C | 24.8 °C | 87.88 mm |
| September | 7.3 °C | 20.1 °C | 88.14 mm |
| October | 0.9 °C | 11.8 °C | 70.61 mm |
| November | -6.2 °C | 2.7 °C | 38.35 mm |
| December | -13.9 °C | -4.6 °C | 27.43 mm |
| Annual | -1.6 °C | 10.4 °C | 750.06 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4a : -34.4°C to -31.7°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 |