Stormstown, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.9 °C (low) to 14.8 °C (high). Annual precipitation averages 1113.3 Millimeters. Stormstown is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.7 °C | 0.9 °C | 76.71 mm |
| February | -7.2 °C | 2.6 °C | 66.55 mm |
| March | -3.3 °C | 7.5 °C | 88.14 mm |
| April | 2.7 °C | 15 °C | 93.22 mm |
| May | 8.6 °C | 20.8 °C | 104.65 mm |
| June | 13.3 °C | 25 °C | 107.7 mm |
| July | 15.5 °C | 27.3 °C | 98.55 mm |
| August | 14.6 °C | 26.4 °C | 101.09 mm |
| September | 10.5 °C | 22.7 °C | 112.52 mm |
| October | 4.7 °C | 16.1 °C | 99.06 mm |
| November | -0.6 °C | 9.5 °C | 81.03 mm |
| December | -4.6 °C | 3.3 °C | 84.07 mm |
| Annual | 3.9 °C | 14.8 °C | 1113.29 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |