Delaware Water Gap, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.6 °C (low) to 16.7 °C (high). Annual precipitation averages 1335 Millimeters. Delaware Water Gap is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.1 °C | 2.9 °C | 95 mm |
| February | -6.3 °C | 4.7 °C | 76.45 mm |
| March | -2.5 °C | 9.3 °C | 100.08 mm |
| April | 3.2 °C | 16.6 °C | 107.7 mm |
| May | 8.9 °C | 22.2 °C | 110.74 mm |
| June | 13.9 °C | 26.7 °C | 124.71 mm |
| July | 16.7 °C | 29.3 °C | 119.13 mm |
| August | 15.7 °C | 28.3 °C | 121.92 mm |
| September | 11.7 °C | 24.7 °C | 133.86 mm |
| October | 5.3 °C | 18 °C | 135.89 mm |
| November | -0.3 °C | 11.8 °C | 95.5 mm |
| December | -4.1 °C | 5.8 °C | 114.05 mm |
| Annual | 4.6 °C | 16.7 °C | 1335.03 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |