Keewatin, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -1.7 °C (low) to 9.7 °C (high). Annual precipitation averages 740.4 Millimeters. Keewatin is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -18.8 °C | -8.3 °C | 23.11 mm |
| February | -17 °C | -4.7 °C | 19.56 mm |
| March | -9.8 °C | 2.4 °C | 30.23 mm |
| April | -2.3 °C | 10.2 °C | 49.78 mm |
| May | 4.6 °C | 17.8 °C | 81.03 mm |
| June | 10.4 °C | 22.7 °C | 113.54 mm |
| July | 13.1 °C | 25.3 °C | 110.24 mm |
| August | 11.9 °C | 24.3 °C | 86.11 mm |
| September | 7.4 °C | 19.4 °C | 87.88 mm |
| October | 0.9 °C | 11.2 °C | 71.37 mm |
| November | -6.7 °C | 1.7 °C | 39.12 mm |
| December | -14.2 °C | -5.4 °C | 28.45 mm |
| Annual | -1.7 °C | 9.7 °C | 740.42 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4a : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 3b : -37.2°C to -34.4°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |