Thompsonville, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.6 °C (low) to 16.6 °C (high). Annual precipitation averages 1071.6 Millimeters. Thompsonville is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.8 °C | 2.9 °C | 82.55 mm |
| February | -5.1 °C | 4.4 °C | 66.29 mm |
| March | -1.3 °C | 9.6 °C | 87.38 mm |
| April | 4.2 °C | 17.1 °C | 88.39 mm |
| May | 9.9 °C | 22.3 °C | 106.93 mm |
| June | 14.8 °C | 26.6 °C | 108.71 mm |
| July | 17.2 °C | 28.9 °C | 116.08 mm |
| August | 16.4 °C | 28.2 °C | 88.39 mm |
| September | 12.7 °C | 24.7 °C | 87.88 mm |
| October | 6.3 °C | 17.9 °C | 78.23 mm |
| November | 1.1 °C | 11.2 °C | 77.72 mm |
| December | -2.9 °C | 5.4 °C | 83.06 mm |
| Annual | 5.6 °C | 16.6 °C | 1071.61 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |