Bellechester, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.1 °F (low) to 54.4 °F (high). Annual precipitation averages 34.8 Inches. 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 | 6.0 °F | 22.9 °F | 0.92 in. |
| February | 9.6 °F | 27.5 °F | 0.96 in. |
| March | 22.0 °F | 39.9 °F | 1.74 in. |
| April | 34.3 °F | 55.5 °F | 3.19 in. |
| May | 46.6 °F | 67.8 °F | 4.41 in. |
| June | 57.1 °F | 77.3 °F | 5.34 in. |
| July | 60.7 °F | 80.9 °F | 4.26 in. |
| August | 58.3 °F | 78.8 °F | 4.81 in. |
| September | 50.0 °F | 72.2 °F | 3.76 in. |
| October | 37.4 °F | 58.8 °F | 2.53 in. |
| November | 25.3 °F | 42.0 °F | 1.63 in. |
| December | 13.4 °F | 28.6 °F | 1.21 in. |
| Annual | 35.1 °F | 54.4 °F | 34.76 in. |
| 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 : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |