Goodhue, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.5 °C (low) to 12.4 °C (high). Annual precipitation averages 871.5 Millimeters. Goodhue 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 | -14.6 °C | -5.1 °C | 23.37 mm |
| February | -12.6 °C | -2.4 °C | 24.38 mm |
| March | -5.7 °C | 4.4 °C | 42.42 mm |
| April | 1.1 °C | 13.2 °C | 78.99 mm |
| May | 7.8 °C | 19.9 °C | 109.22 mm |
| June | 13.7 °C | 25.2 °C | 136.4 mm |
| July | 15.7 °C | 27.1 °C | 105.92 mm |
| August | 14.3 °C | 25.9 °C | 120.9 mm |
| September | 9.7 °C | 22.4 °C | 95 mm |
| October | 2.8 °C | 15.1 °C | 64.01 mm |
| November | -3.9 °C | 5.5 °C | 39.37 mm |
| December | -10.6 °C | -1.9 °C | 31.5 mm |
| Annual | 1.5 °C | 12.4 °C | 871.48 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 | Dfb - Humid Continental Mild Summer, Wet All Year |