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Insulation in Dewey Beach: July highs average about 88°F; January lows average about 27°F.

Weather and your home

In Sussex County, July highs average about 88°F and January lows about 27°F, with roughly 46 inches of rain a year.

Storms

Over the last 10 years the National Weather Service recorded damaging thunderstorm winds, flash floods and hailstorms in Sussex County, with hail up to 2.25 inches across. After a storm, a quick roof and gutter check catches damage before it turns into a leak.

Disaster history

Sussex County has had 13 federal disaster declarations in the last 25 years, most often for hurricanes; the latest was Severe Winter Storm (2026).

Services

Roof repair in Dewey Beach · AC & heating repair in Dewey Beach · Plumbing in Dewey Beach · Electrical in Dewey Beach · Gutters in Dewey Beach · Pest control in Dewey Beach · Lawn care in Dewey Beach · Pool service in Dewey Beach · Siding in Dewey Beach · Windows & doors in Dewey Beach · Solar in Dewey Beach · Generators in Dewey Beach · Insulation in Dewey Beach · Remodeling in Dewey Beach · Kitchen remodeling in Dewey Beach · Bathroom remodeling in Dewey Beach · Painting in Dewey Beach · Flooring in Dewey Beach · Drywall in Dewey Beach · Concrete & pavers in Dewey Beach · Fencing in Dewey Beach · Decks in Dewey Beach · Tree service in Dewey Beach · Pressure washing in Dewey Beach · House cleaning in Dewey Beach · Junk removal in Dewey Beach · Garage doors in Dewey Beach · Appliance repair in Dewey Beach · Water & mold restoration in Dewey Beach · Foundation repair in Dewey Beach · Handyman in Dewey Beach

Questions

How do I know my home needs insulation?

Uneven rooms, high bills and an attic you can see the joists in are the signs; older homes often have far too little.

What gives the best return?

Attic insulation and air-sealing usually pay back fastest.

These are Sussex County figures — more about homes in Milford.

Nearby

Rehoboth Beach · Henlopen Acres · Lewes · Bethany Beach · Millville · Ocean View · South Bethany · Milton