Thompsontown, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.3 °C (low) to 16.7 °C (high). Annual precipitation averages 1144.8 Millimeters. Thompsontown is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.3 °C | 2.7 °C | 80.52 mm |
| February | -5.7 °C | 4.5 °C | 64.26 mm |
| March | -1.7 °C | 9.6 °C | 91.69 mm |
| April | 4.1 °C | 17 °C | 94.74 mm |
| May | 9.7 °C | 22.4 °C | 104.39 mm |
| June | 14.9 °C | 27.1 °C | 104.39 mm |
| July | 17.2 °C | 29.6 °C | 107.95 mm |
| August | 16.3 °C | 28.6 °C | 104.39 mm |
| September | 12.3 °C | 24.7 °C | 117.6 mm |
| October | 6 °C | 17.9 °C | 103.89 mm |
| November | 0.6 °C | 11.4 °C | 81.28 mm |
| December | -3.4 °C | 5.2 °C | 89.66 mm |
| Annual | 5.3 °C | 16.7 °C | 1144.76 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°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 |