Hardwick, Minnesota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 1.5 °C (low) to 12.8 °C (high). Annual precipitation averages 764.3 Millimeters. Hardwick is located in USDA Plant Hardiness Zone 4b. 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 | -14.4 °C | -4.7 °C | 20.32 mm |
| February | -12.3 °C | -2 °C | 24.13 mm |
| March | -5.8 °C | 4.9 °C | 37.59 mm |
| April | 0.8 °C | 13.2 °C | 72.39 mm |
| May | 7.9 °C | 20.1 °C | 100.58 mm |
| June | 14.3 °C | 25.7 °C | 119.63 mm |
| July | 16.3 °C | 27.9 °C | 89.41 mm |
| August | 14.7 °C | 26.6 °C | 86.87 mm |
| September | 9.8 °C | 22.9 °C | 84.58 mm |
| October | 2.4 °C | 15.1 °C | 63.5 mm |
| November | -4.9 °C | 5.7 °C | 34.29 mm |
| December | -11.2 °C | -2.1 °C | 30.99 mm |
| Annual | 1.5 °C | 12.8 °C | 764.28 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 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |