Scranton, 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 15.6 °C (high). Annual precipitation averages 1023.4 Millimeters. Scranton 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 | -7.7 °C | 1.3 °C | 62.99 mm |
| February | -7.3 °C | 2.8 °C | 50.8 mm |
| March | -3 °C | 7.7 °C | 69.34 mm |
| April | 2.8 °C | 15.3 °C | 88.9 mm |
| May | 8.7 °C | 21.7 °C | 92.96 mm |
| June | 13.7 °C | 26.2 °C | 123.7 mm |
| July | 16.1 °C | 28.8 °C | 109.22 mm |
| August | 15.1 °C | 27.7 °C | 112.01 mm |
| September | 11.2 °C | 23.9 °C | 84.58 mm |
| October | 5.1 °C | 16.9 °C | 95.25 mm |
| November | 0.2 °C | 10.4 °C | 64.26 mm |
| December | -4.2 °C | 4.3 °C | 69.34 mm |
| Annual | 4.2 °C | 15.6 °C | 1023.35 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 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |