Thompson, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.6 °C (low) to 12.4 °C (high). Annual precipitation averages 1232.9 Millimeters. Thompson 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 | -10.8 °C | -1.5 °C | 81.28 mm |
| February | -10.4 °C | -0.1 °C | 70.87 mm |
| March | -6.3 °C | 4.5 °C | 85.34 mm |
| April | 0.1 °C | 12 °C | 98.3 mm |
| May | 6.1 °C | 18.3 °C | 118.62 mm |
| June | 11.3 °C | 22.8 °C | 136.14 mm |
| July | 13.6 °C | 25.2 °C | 125.22 mm |
| August | 12.8 °C | 24.4 °C | 107.44 mm |
| September | 8.7 °C | 20.7 °C | 117.6 mm |
| October | 2.8 °C | 13.9 °C | 117.35 mm |
| November | -2.3 °C | 7.2 °C | 87.38 mm |
| December | -6.8 °C | 1.2 °C | 87.38 mm |
| Annual | 1.6 °C | 12.4 °C | 1232.92 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 |