Great Bend, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3 °C (low) to 14.3 °C (high). Annual precipitation averages 1097.8 Millimeters. Great Bend is located in USDA Plant Hardiness Zone 6a. 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 | -9.2 °C | -0.1 °C | 71.12 mm |
| February | -8.8 °C | 1.2 °C | 57.4 mm |
| March | -4.8 °C | 6.2 °C | 80.52 mm |
| April | 1.2 °C | 13.9 °C | 93.73 mm |
| May | 7.3 °C | 20.7 °C | 96.01 mm |
| June | 12.4 °C | 25.3 °C | 113.54 mm |
| July | 15 °C | 27.4 °C | 107.95 mm |
| August | 14.2 °C | 26.7 °C | 111.51 mm |
| September | 10.3 °C | 22.8 °C | 105.41 mm |
| October | 4.2 °C | 16 °C | 102.36 mm |
| November | -0.9 °C | 8.6 °C | 77.72 mm |
| December | -5.2 °C | 2.9 °C | 80.52 mm |
| Annual | 3 °C | 14.3 °C | 1097.79 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 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 |