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Pressure washing in Mount Vernon: July highs average about 82°F; about 21 inches of rain fall a year.
In Grant County, July highs average about 82°F and January lows about 21°F, with roughly 21 inches of rain a year. Long, cold winters put furnaces and pipes to the test.
Over the last 10 years the National Weather Service recorded hailstorms, floods and damaging thunderstorm winds in Grant County, with hail up to 2 inches across. After a storm, a quick roof and gutter check catches damage before it turns into a leak.
Grant County has had 12 federal disaster declarations in the last 25 years, most often for wildfires; the latest was Wildfires (2025).
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Once a year for siding and walkways in most climates; more where it is humid.
Yes, on soft wood and some siding — pros use soft washing there.
These are Grant County figures — more about homes in John Day.
John Day · Canyon City · Prairie City · Long Creek · Seneca · Dayville · Monument · Greenhorn