Skowhegan, Maine has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.9 °C (low) to 12.6 °C (high). Annual precipitation averages 1117.4 Millimeters. Skowhegan 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 Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -13.9 °C | -2.3 °C | 80.26 mm |
| February | -13.4 °C | -0.6 °C | 65.79 mm |
| March | -7.3 °C | 4.4 °C | 82.3 mm |
| April | -0.4 °C | 11.3 °C | 95.76 mm |
| May | 5.8 °C | 18.3 °C | 86.87 mm |
| June | 11.3 °C | 23.3 °C | 110.74 mm |
| July | 14.4 °C | 26.3 °C | 93.22 mm |
| August | 13.4 °C | 25.9 °C | 88.9 mm |
| September | 8.9 °C | 21.7 °C | 89.41 mm |
| October | 2.9 °C | 14.4 °C | 124.97 mm |
| November | -2.6 °C | 7.3 °C | 100.58 mm |
| December | -8.9 °C | 1.1 °C | 98.55 mm |
| Annual | 0.9 °C | 12.6 °C | 1117.35 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| 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 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |