Wellsboro, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.8 °C (low) to 14.4 °C (high). Annual precipitation averages 987.1 Millimeters. Wellsboro is located in USDA Plant Hardiness Zone 5b. 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 | -10.1 °C | 0.2 °C | 63.75 mm |
| February | -9.6 °C | 1.9 °C | 44.2 mm |
| March | -5.6 °C | 6.4 °C | 73.66 mm |
| April | 0.1 °C | 14.1 °C | 82.55 mm |
| May | 6.1 °C | 20.9 °C | 86.11 mm |
| June | 11.1 °C | 25.2 °C | 102.62 mm |
| July | 13.4 °C | 27.4 °C | 84.84 mm |
| August | 12.7 °C | 26.6 °C | 101.35 mm |
| September | 8.8 °C | 22.8 °C | 106.68 mm |
| October | 2.8 °C | 15.9 °C | 94.49 mm |
| November | -2 °C | 8.6 °C | 76.71 mm |
| December | -6.2 °C | 2.8 °C | 70.1 mm |
| Annual | 1.8 °C | 14.4 °C | 987.06 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 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |