Fort Indiantown Gap, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.9 °C (low) to 16.4 °C (high). Annual precipitation averages 1250.2 Millimeters. Fort Indiantown 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 | -6.9 °C | 2.6 °C | 87.38 mm |
| February | -6.3 °C | 4.3 °C | 68.83 mm |
| March | -1.9 °C | 9.2 °C | 100.33 mm |
| April | 3.8 °C | 16.2 °C | 102.36 mm |
| May | 9.4 °C | 21.8 °C | 105.92 mm |
| June | 14.4 °C | 26.5 °C | 121.16 mm |
| July | 16.7 °C | 29.2 °C | 122.17 mm |
| August | 15.8 °C | 28.1 °C | 113.79 mm |
| September | 11.8 °C | 24.3 °C | 127.25 mm |
| October | 5.4 °C | 17.7 °C | 113.03 mm |
| November | 0.2 °C | 11.2 °C | 90.68 mm |
| December | -3.9 °C | 5.1 °C | 97.28 mm |
| Annual | 4.9 °C | 16.4 °C | 1250.18 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 | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |