Newfolden, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -2.2 °C (low) to 9.3 °C (high). Annual precipitation averages 606 Millimeters. Newfolden is located in USDA Plant Hardiness Zone 3b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -20.4 °C | -10.1 °C | 16.51 mm |
| February | -18.8 °C | -7.5 °C | 14.48 mm |
| March | -10.8 °C | 0.2 °C | 19.56 mm |
| April | -1.9 °C | 10 °C | 30.73 mm |
| May | 5.3 °C | 18.1 °C | 80.52 mm |
| June | 11.8 °C | 23.4 °C | 104.39 mm |
| July | 13.4 °C | 25.8 °C | 93.22 mm |
| August | 11.8 °C | 25.4 °C | 76.45 mm |
| September | 6.8 °C | 20.3 °C | 71.88 mm |
| October | 0.3 °C | 11.4 °C | 52.07 mm |
| November | -7.7 °C | 1.3 °C | 24.64 mm |
| December | -15.6 °C | -6.6 °C | 21.59 mm |
| Annual | -2.2 °C | 9.3 °C | 606.04 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 3b : -37.2°C to -34.4°C |
| Plant Hardiness Zone - 2012 | Zone 3b : -37.2°C to -34.4°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |