Gratiot, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 37.3 °F (low) to 57.6 °F (high). Annual precipitation averages 38.3 Inches. 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 | 10.6 °F | 27.7 °F | 1.4 in. |
| February | 13.8 °F | 32.1 °F | 1.51 in. |
| March | 24.9 °F | 44.5 °F | 2.11 in. |
| April | 36.0 °F | 58.3 °F | 3.86 in. |
| May | 47.5 °F | 69.9 °F | 4.27 in. |
| June | 57.9 °F | 79.6 °F | 5.68 in. |
| July | 61.5 °F | 82.8 °F | 4.53 in. |
| August | 59.4 °F | 81.1 °F | 4.16 in. |
| September | 51.0 °F | 74.4 °F | 3.79 in. |
| October | 39.4 °F | 61.5 °F | 2.92 in. |
| November | 28.2 °F | 45.9 °F | 2.3 in. |
| December | 17.3 °F | 33.2 °F | 1.74 in. |
| Annual | 37.3 °F | 57.6 °F | 38.27 in. |
| 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 : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |