Sunburg, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.6 °C (low) to 11.8 °C (high). Annual precipitation averages 710.9 Millimeters. Sunburg 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 Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -16.4 °C | -6.4 °C | 17.27 mm |
| February | -14.6 °C | -3.7 °C | 18.03 mm |
| March | -7.4 °C | 3.2 °C | 37.85 mm |
| April | 0.2 °C | 12.3 °C | 59.18 mm |
| May | 7.4 °C | 19.8 °C | 81.53 mm |
| June | 13.4 °C | 25.2 °C | 113.28 mm |
| July | 15.9 °C | 27.6 °C | 107.95 mm |
| August | 14.3 °C | 26.3 °C | 93.22 mm |
| September | 9.6 °C | 22.2 °C | 67.31 mm |
| October | 2.2 °C | 13.9 °C | 61.47 mm |
| November | -5.2 °C | 4.2 °C | 31.24 mm |
| December | -12.3 °C | -3.4 °C | 22.61 mm |
| Annual | 0.6 °C | 11.8 °C | 710.94 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| 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 | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |