Hannasville, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.6 °C (low) to 14.5 °C (high). Annual precipitation averages 1186.9 Millimeters. Hannasville is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.3 °C | 0.5 °C | 86.61 mm |
| February | -7.9 °C | 2.1 °C | 66.8 mm |
| March | -3.9 °C | 6.9 °C | 88.14 mm |
| April | 2.1 °C | 14.4 °C | 105.41 mm |
| May | 8 °C | 20.7 °C | 101.35 mm |
| June | 12.8 °C | 24.9 °C | 129.03 mm |
| July | 15.2 °C | 27.1 °C | 127.51 mm |
| August | 14.3 °C | 26.3 °C | 102.87 mm |
| September | 10.6 °C | 22.7 °C | 104.14 mm |
| October | 4.8 °C | 15.9 °C | 96.77 mm |
| November | -0.2 °C | 9.1 °C | 88.14 mm |
| December | -4.7 °C | 3 °C | 90.17 mm |
| Annual | 3.6 °C | 14.5 °C | 1186.94 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°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 |