Pellston, Michigan has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.7 °C (low) to 12 °C (high). Annual precipitation averages 830.6 Millimeters. Pellston is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -11.9 °C | -3.1 °C | 60.96 mm |
| February | -12.8 °C | -1.9 °C | 37.59 mm |
| March | -8.6 °C | 3.4 °C | 45.21 mm |
| April | -1.6 °C | 10.4 °C | 71.63 mm |
| May | 4.8 °C | 18.3 °C | 71.63 mm |
| June | 10.3 °C | 23.8 °C | 68.33 mm |
| July | 13.1 °C | 26 °C | 70.61 mm |
| August | 12.3 °C | 25.3 °C | 74.42 mm |
| September | 8.3 °C | 21.2 °C | 86.11 mm |
| October | 2.9 °C | 13.6 °C | 106.68 mm |
| November | -1.9 °C | 6.2 °C | 73.66 mm |
| December | -7 °C | 0.3 °C | 63.75 mm |
| Annual | 0.7 °C | 12 °C | 830.58 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 21 - May 31 |
| 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 |