Delaware Water Gap National Recreation Area - Climate

Delaware Water Gap National Recreation Area by National Parks Service

Summer air temperatures average 75 - 85 degrees F (some days in the 90s) with lows to the 50s. Moderately high humidity. Occasional thunderstorms and dense fog. Water temperatures in summer (May to September) rise from the mid-50s to highs in the mid-70s in July.

Spring and fall climate is variable. Temperature can drop rapidly after sunset on warm days. Wetsuits may be required for river use.

Winter air temperatures (December to March) are frequently below freezing, with numerous snow and ice storms in some years. Water temperatures drop from the 50s to the 30s by December, with most of the river usually freezing over each winter.

Recommended Clothing: Always dress in layers. Be prepared for rain and cold weather at any time. Hypothermia is possible, especially on the river, even during the summer. Pack properly for your river trip. Appropriate, well-fitted shoes are essential for hiking or climbing.