Coates, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.3 °C (low) to 12.7 °C (high). Annual precipitation averages 868.9 Millimeters. Coates 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 | -13.9 °C | -4.8 °C | 25.15 mm |
| February | -12.2 °C | -2.2 °C | 24.38 mm |
| March | -5.4 °C | 4.8 °C | 45.21 mm |
| April | 1.9 °C | 13.2 °C | 77.47 mm |
| May | 8.8 °C | 20.2 °C | 108.97 mm |
| June | 14.7 °C | 25.6 °C | 129.29 mm |
| July | 17 °C | 27.8 °C | 110.74 mm |
| August | 15.6 °C | 26.7 °C | 115.32 mm |
| September | 10.9 °C | 22.7 °C | 86.87 mm |
| October | 3.7 °C | 14.8 °C | 69.34 mm |
| November | -3.4 °C | 5.6 °C | 43.18 mm |
| December | -10.3 °C | -1.9 °C | 33.02 mm |
| Annual | 2.3 °C | 12.7 °C | 868.94 mm |
| 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 5a : -28.9°C to -26.1°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 |