Gratiot, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.9 °C (low) to 14.2 °C (high). Annual precipitation averages 972.1 Millimeters. Gratiot is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -11.9 °C | -2.4 °C | 35.56 mm |
| February | -10.1 °C | 0.1 °C | 38.35 mm |
| March | -3.9 °C | 6.9 °C | 53.59 mm |
| April | 2.2 °C | 14.6 °C | 98.04 mm |
| May | 8.6 °C | 21.1 °C | 108.46 mm |
| June | 14.4 °C | 26.4 °C | 144.27 mm |
| July | 16.4 °C | 28.2 °C | 115.06 mm |
| August | 15.2 °C | 27.3 °C | 105.66 mm |
| September | 10.6 °C | 23.6 °C | 96.27 mm |
| October | 4.1 °C | 16.4 °C | 74.17 mm |
| November | -2.1 °C | 7.7 °C | 58.42 mm |
| December | -8.2 °C | 0.7 °C | 44.2 mm |
| Annual | 2.9 °C | 14.2 °C | 972.05 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |