Callensburg, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.6 °C (low) to 15.9 °C (high). Annual precipitation averages 1146.1 Millimeters. Callensburg is located in USDA Plant Hardiness Zone 6a. 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 | -7.7 °C | 1.8 °C | 85.34 mm |
| February | -7.4 °C | 3.4 °C | 64.52 mm |
| March | -3.5 °C | 8.6 °C | 84.84 mm |
| April | 1.9 °C | 16.4 °C | 99.06 mm |
| May | 7.8 °C | 22.3 °C | 96.52 mm |
| June | 12.9 °C | 26.4 °C | 128.02 mm |
| July | 15.2 °C | 28.3 °C | 122.17 mm |
| August | 14.4 °C | 27.9 °C | 102.11 mm |
| September | 10.6 °C | 24.1 °C | 102.11 mm |
| October | 4.5 °C | 17.3 °C | 86.11 mm |
| November | -0.6 °C | 10.2 °C | 87.63 mm |
| December | -4.4 °C | 4.1 °C | 87.63 mm |
| Annual | 3.6 °C | 15.9 °C | 1146.06 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |