Graceville, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.6 °C (low) to 11.8 °C (high). Annual precipitation averages 648.2 Millimeters. Graceville 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 Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -16.3 °C | -6.3 °C | 16.51 mm |
| February | -14.4 °C | -3.9 °C | 16.26 mm |
| March | -7.3 °C | 3.1 °C | 28.96 mm |
| April | 0.1 °C | 12.1 °C | 62.23 mm |
| May | 7.5 °C | 19.8 °C | 75.69 mm |
| June | 13.7 °C | 25.1 °C | 100.84 mm |
| July | 15.9 °C | 27.4 °C | 103.63 mm |
| August | 14.3 °C | 26.4 °C | 73.15 mm |
| September | 9.2 °C | 22.3 °C | 66.8 mm |
| October | 2.1 °C | 14 °C | 60.71 mm |
| November | -5.4 °C | 4.8 °C | 25.65 mm |
| December | -12.4 °C | -3.1 °C | 17.78 mm |
| Annual | 0.6 °C | 11.8 °C | 648.21 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| 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 | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |