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Pressure washing in Old Westbury: July highs average about 85°F; about 46 inches of rain fall a year.

Weather and your home

In Nassau County, July highs average about 85°F and January lows about 26°F, with roughly 46 inches of rain a year.

Storms

Over the last 10 years the National Weather Service recorded flash floods, damaging thunderstorm winds and hailstorms in Nassau County, with hail up to 1.5 inches across. After a storm, a quick roof and gutter check catches damage before it turns into a leak.

Disaster history

Nassau County has had 18 federal disaster declarations in the last 25 years, most often for hurricanes; the latest was Severe Storm And Flooding (2024).

Services

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Questions

How often should a house be pressure washed?

Once a year for siding and walkways in most climates; more where it is humid.

Can pressure washing damage surfaces?

Yes, on soft wood and some siding — pros use soft washing there.

These are Nassau County figures — more about homes in Hempstead.

Nearby

East Hills · Westbury · Brookville · East Williston · Roslyn Harbor · Roslyn · Williston Park · Roslyn Estates