Gap, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.6 °C (low) to 16.7 °C (high). Annual precipitation averages 1241.5 Millimeters. Gap is located in USDA Plant Hardiness Zone 7a. 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 | -5.1 °C | 3.5 °C | 89.15 mm |
| February | -4.6 °C | 4.7 °C | 72.64 mm |
| March | -0.5 °C | 9.6 °C | 106.68 mm |
| April | 5.2 °C | 16.4 °C | 96.01 mm |
| May | 10.6 °C | 21.7 °C | 98.55 mm |
| June | 15.7 °C | 26.6 °C | 117.6 mm |
| July | 18.6 °C | 28.9 °C | 120.4 mm |
| August | 17.7 °C | 28.2 °C | 109.73 mm |
| September | 13.8 °C | 24.6 °C | 125.73 mm |
| October | 7.4 °C | 18 °C | 116.33 mm |
| November | 2.3 °C | 11.7 °C | 85.6 mm |
| December | -2 °C | 5.9 °C | 103.12 mm |
| Annual | 6.6 °C | 16.7 °C | 1241.54 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 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |