Updated October 2026
Cape Henlopen State Park: Weather by Month and When to Go
Cape Henlopen State Park is a state park in Delaware. Average highs range from 46°F in January to 88°F in July.
Average highs sit between 60°F and 80°F in April through May and September through October. They run above 80°F in June through August and below 60°F in November through March. The figures are NOAA climate normals for 1991–2020, measured at a weather station 3.4 miles from the park.
Warmest average high
88°F
July
Coldest average low
30°F
January
Most precipitation
5.0 in
July
Longest days
14.7 h
June
Cape Henlopen State Park weather by month
| Month | Average high | Average low | Precipitation | Snowfall | Daylight |
|---|---|---|---|---|---|
| January | 46°F | 30°F | 3.4 in | 2.0 in | 9.6 h |
| February | 48°F | 32°F | 3.2 in | 6.5 in | 10.5 h |
| March | 55°F | 38°F | 4.2 in | 1.0 in | 11.7 h |
| April | 66°F | 46°F | 3.5 in | 0.0 in | 13.0 h |
| May | 75°F | 56°F | 3.4 in | 0.0 in | 14.1 h |
| June | 83°F | 66°F | 3.8 in | 0.0 in | 14.7 h |
| July | 88°F | 71°F | 5.0 in | 0.0 in | 14.5 h |
| August | 86°F | 69°F | 4.3 in | 0.0 in | 13.5 h |
| September | 80°F | 64°F | 4.5 in | 0.0 in | 12.2 h |
| October | 69°F | 52°F | 4.4 in | 0.0 in | 11.0 h |
| November | 59°F | 42°F | 3.6 in | 0.0 in | 9.8 h |
| December | 50°F | 35°F | 4.2 in | 1.0 in | 9.3 h |
Temperature, precipitation and snowfall figures are NOAA climate normals for 1991–2020 from station USC00075320, the nearest station with a complete set of temperature normals, 3.4 miles from the park. Conditions in the park can differ from the station's, most of all where the two sit at different elevations. Daylight is calculated for the park's latitude at the middle of each month.
What the averages show
- Temperature. July is the warmest month, with an average high of 88°F and an average low of 71°F. January is the coldest month, with an average low of 30°F and an average high of 46°F.
- Precipitation. July is the wettest month, averaging 5.0 inches of precipitation, and February is the driest, at 3.2 inches. An average year brings about 47.5 inches in total.
- Snowfall. The station averages 10.5 inches of snow a year, with the most in February (6.5 inches).
- Daylight. Days run from about 9.3 hours of daylight in December to 14.7 hours in June.
Camping, trails, maps and fees
Whether Cape Henlopen State Park has camping or cabins, where its trails run, when it opens and what it charges are all published by the agency that runs the park. Its official page is the place to check before a trip.
Official Cape Henlopen State Park page
For the forecast rather than the averages, the National Weather Service issues a point forecast for the park's location.
National Weather Service forecast for Cape Henlopen State Park
Where to stay near Cape Henlopen State Park
Hotels, cabins and vacation rentals near Cape Henlopen State Park, with live availability and prices.
Top-rated places to stay near Cape Henlopen State Park
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Frequently Asked Questions
July is the warmest month, with an average high of 88°F and an average low of 71°F. January is the coldest month, with an average low of 30°F and an average high of 46°F. These are NOAA 1991–2020 climate normals from a weather station 3.4 miles from the park.
Average highs sit between 60°F and 80°F in April through May and September through October. They run above 80°F in June through August and below 60°F in November through March.
July is the wettest month, averaging 5.0 inches of precipitation, and February is the driest, at 3.2 inches. An average year brings about 47.5 inches in total. Snowfall averages 10.5 inches a year, with the most in February.
Days run from about 9.3 hours of daylight in December to 14.7 hours in June. The hours are calculated for the park's latitude.
Nearest National Park Service sites
- Assateague Island National Seashore50 miles away
- Harriet Tubman Underground Railroad National Historical Park60 miles away
- First State National Historical Park78 miles away
Nearby state parks
- Trap Pond State Park27 miles away
- Assateague State Park37 miles away · Maryland
- Lums Pond State Park64 miles away
- Sandy Point State Park73 miles away · Maryland
Distances are measured in a straight line from the park, so the drive is longer.
Sources: NOAA NCEI U.S. Climate Normals 1991–2020; USGS Protected Areas Database for location; the official Delaware state park listing for the park's name.