AC & heating repair in Brentwood, MO: we connect you with top-rated local HVAC pros, checked by our team — their proposals come straight to your Homeshi account. Free for property owners.
In Brentwood, July highs average about 88°F and January lows about 23°F.
In St. Louis County, July highs average about 88°F and January lows about 23°F, with roughly 42 inches of rain a year.
Over the last 10 years the National Weather Service recorded hailstorms, damaging thunderstorm winds and flash floods in St. Louis County, with hail up to 2.5 inches across. After a storm, a quick roof and gutter check catches damage before it turns into a leak.
The typical home in St. Louis County was built around 1965, about 61 years ago, and 72% were built before 1980. Homes that age often need updated wiring, plumbing and roofs.
St. Louis County has had 22 federal disaster declarations in the last 25 years, most often for severe storms; the latest was Severe Storms, Straight-Line Winds, Tornadoes, And Flooding (2025).
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Book the AC tune-up in spring and the heating check in fall, before the first real heat or cold — repair slots fill fast in a heat wave.
Central AC units usually last 12–15 years and furnaces 15–20; past that, a repair often costs more than it saves.
If the system is over 12–15 years old or needs a major part (compressor, heat exchanger), ask for both prices — the pro sends them on Homeshi so you can compare.
These are St. Louis County figures — more about homes in Florissant.
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