Hughesville, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.8 °C (low) to 16.2 °C (high). Annual precipitation averages 1132.6 Millimeters. Hughesville 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.1 °C | 1.9 °C | 84.58 mm |
| February | -6.4 °C | 3.7 °C | 62.74 mm |
| March | -2.3 °C | 8.7 °C | 88.9 mm |
| April | 3.4 °C | 16.2 °C | 97.28 mm |
| May | 9.2 °C | 22.2 °C | 98.81 mm |
| June | 14.3 °C | 26.7 °C | 108.2 mm |
| July | 16.6 °C | 29.2 °C | 112.52 mm |
| August | 15.8 °C | 28.2 °C | 99.82 mm |
| September | 11.7 °C | 24.3 °C | 112.01 mm |
| October | 5.6 °C | 17.4 °C | 99.82 mm |
| November | 0.3 °C | 10.7 °C | 79.25 mm |
| December | -3.8 °C | 4.6 °C | 88.65 mm |
| Annual | 4.8 °C | 16.2 °C | 1132.58 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 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 | Dfb - Humid Continental Mild Summer, Wet All Year |