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Decks in Hamilton: July highs average about 77°F; about 29 inches of rain fall a year.
In Ravalli County, July highs average about 77°F and January lows about 16°F, with roughly 29 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, damaging thunderstorm winds and floods in Ravalli 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.
Ravalli County has had 9 federal disaster declarations in the last 25 years, most often for wildfires; the latest was Severe Winter Storm And Straight-Line Winds (2026).
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Composite costs more up front and needs almost no care; pressure-treated wood is cheaper but needs sealing.
Once a year — loose boards, soft spots and wobbly railings are safety issues.
Pinesdale · Darby · Stevensville · Philipsburg · Missoula · Alberton · Drummond · Deer Lodge