Best Time of Year to Pressure Wash a House in Virginia

You can wash a house any time the weather cooperates, but in Northern Virginia some seasons give you better, longer-lasting results.

Short answer: late spring (after the heaviest pollen) and early fall are the best times. Summer works well too. Avoid days near or below freezing.

Spring: best after the pollen drops

Spring is the most popular time to wash a house in Northern Virginia, and for good reason: winter grime, mildew and algae are at their worst, and everyone wants their home looking fresh for the warmer months.

The catch is pollen. Northern Virginia’s tree pollen season typically peaks in April and early May, coating siding, decks, cars and patios in a yellow-green film. Washing in the middle of peak pollen means your house may look dusty again within days.

Tip: if you want to wash in spring, aim for after the heaviest pollen has passed — often from mid-May into June. Or schedule a wash and plan a quick rinse later in the season.

Summer: reliable weather, fast drying

Summer offers long days and warm temperatures, so surfaces dry quickly. It’s a good time for deck cleaning before staining, because wood needs dry weather afterward. The main considerations are afternoon thunderstorms and extreme heat, which can make cleaning solutions dry too quickly on sunny walls — professionals work around this by cleaning in sections and keeping surfaces wet.

Early fall: the underrated sweet spot

September and October are excellent months to wash a house in Northern Virginia:

• Pollen is long gone
• Temperatures are mild
• Algae and mildew from the humid summer are removed before winter
• Your home looks its best for fall gatherings and holiday photos

Early fall is also the right time to get exterior cleaning done before holiday light installation. Clean siding and gutters make lights look better.

Late fall and winter: weather-dependent

Exterior cleaning is possible in late fall and on mild winter days, but freezing temperatures are a problem: water can freeze on walkways, steps and driveways and create a slip hazard. Most cleaning is best done when temperatures stay comfortably above freezing through the day.

Other timing factors

• Before painting: wash first, then let the siding dry fully before painting.
• Before selling: wash one to two weeks before listing photos. See pressure washing before selling your home.
• HOA notices: schedule as soon as possible to meet the deadline.
• After nearby construction: wait until the dusty phase of the project is done.

Season-by-season summary

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