Port Carbon, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.2 °C (low) to 16.2 °C (high). Annual precipitation averages 1304.3 Millimeters. Port Carbon 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 | -7.4 °C | 2.6 °C | 90.93 mm |
| February | -6.8 °C | 4.2 °C | 70.87 mm |
| March | -2.5 °C | 8.8 °C | 101.85 mm |
| April | 3.1 °C | 15.9 °C | 110.49 mm |
| May | 8.4 °C | 21.7 °C | 108.46 mm |
| June | 13.5 °C | 26.3 °C | 125.73 mm |
| July | 15.9 °C | 28.9 °C | 123.44 mm |
| August | 14.9 °C | 28 °C | 111 mm |
| September | 10.9 °C | 24.2 °C | 132.33 mm |
| October | 4.6 °C | 17.7 °C | 124.71 mm |
| November | -0.3 °C | 10.9 °C | 99.06 mm |
| December | -4.3 °C | 5.2 °C | 105.41 mm |
| Annual | 4.2 °C | 16.2 °C | 1304.28 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |