Ponshewaing, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.2 °C (low) to 12.1 °C (high). Annual precipitation averages 865.6 Millimeters. Ponshewaing is located in USDA Plant Hardiness Zone 5a. 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 | -11.1 °C | -2.7 °C | 60.45 mm |
| February | -12 °C | -1.5 °C | 39.62 mm |
| March | -8 °C | 3.8 °C | 46.48 mm |
| April | -1.1 °C | 10.4 °C | 72.9 mm |
| May | 5.3 °C | 18.2 °C | 74.93 mm |
| June | 10.7 °C | 23.4 °C | 73.91 mm |
| July | 13.3 °C | 25.7 °C | 70.36 mm |
| August | 12.7 °C | 25.2 °C | 81.03 mm |
| September | 8.7 °C | 21.3 °C | 90.42 mm |
| October | 3.3 °C | 13.8 °C | 108.71 mm |
| November | -1.5 °C | 6.5 °C | 78.23 mm |
| December | -6.4 °C | 0.6 °C | 68.58 mm |
| Annual | 1.2 °C | 12.1 °C | 865.62 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 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |