Bellechester, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.7 °C (low) to 12.4 °C (high). Annual precipitation averages 882.9 Millimeters. Bellechester is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -14.4 °C | -5.1 °C | 23.37 mm |
| February | -12.4 °C | -2.5 °C | 24.38 mm |
| March | -5.6 °C | 4.4 °C | 44.2 mm |
| April | 1.3 °C | 13.1 °C | 81.03 mm |
| May | 8.1 °C | 19.9 °C | 112.01 mm |
| June | 13.9 °C | 25.2 °C | 135.64 mm |
| July | 15.9 °C | 27.2 °C | 108.2 mm |
| August | 14.6 °C | 26 °C | 122.17 mm |
| September | 10 °C | 22.3 °C | 95.5 mm |
| October | 3 °C | 14.9 °C | 64.26 mm |
| November | -3.7 °C | 5.6 °C | 41.4 mm |
| December | -10.3 °C | -1.9 °C | 30.73 mm |
| Annual | 1.7 °C | 12.4 °C | 882.89 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |