Grant, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.1 °F (low) to 54.1 °F (high). Annual precipitation averages 34.4 Inches. Grant is located in USDA Plant Hardiness Zone 4b. 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 | 5.6 °F | 22.9 °F | 0.94 in. |
| February | 8.9 °F | 28.0 °F | 0.91 in. |
| March | 20.8 °F | 40.4 °F | 1.66 in. |
| April | 34.0 °F | 54.9 °F | 3.19 in. |
| May | 46.7 °F | 67.2 °F | 4.27 in. |
| June | 57.0 °F | 77.0 °F | 4.96 in. |
| July | 61.8 °F | 81.3 °F | 4.32 in. |
| August | 59.1 °F | 79.1 °F | 4.64 in. |
| September | 50.8 °F | 71.5 °F | 3.5 in. |
| October | 37.9 °F | 57.3 °F | 3.07 in. |
| November | 25.3 °F | 41.8 °F | 1.67 in. |
| December | 12.9 °F | 28.1 °F | 1.29 in. |
| Annual | 35.1 °F | 54.1 °F | 34.42 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |