Newfolden, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 28.2 °F (low) to 48.8 °F (high). Annual precipitation averages 23.9 Inches. 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 | -4.7 °F | 13.8 °F | 0.65 in. |
| February | -1.8 °F | 18.5 °F | 0.57 in. |
| March | 12.6 °F | 32.4 °F | 0.77 in. |
| April | 28.5 °F | 50.0 °F | 1.21 in. |
| May | 41.6 °F | 64.5 °F | 3.17 in. |
| June | 53.3 °F | 74.1 °F | 4.11 in. |
| July | 56.1 °F | 78.4 °F | 3.67 in. |
| August | 53.2 °F | 77.8 °F | 3.01 in. |
| September | 44.3 °F | 68.5 °F | 2.83 in. |
| October | 32.6 °F | 52.5 °F | 2.05 in. |
| November | 18.1 °F | 34.4 °F | 0.97 in. |
| December | 4.0 °F | 20.1 °F | 0.85 in. |
| Annual | 28.2 °F | 48.8 °F | 23.86 in. |
| 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 : -35°F to -30°F |
| Plant Hardiness Zone - 2012 | Zone 3b : -35°F to -30°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |