The Colorado Home Exterior Maintenance Calendar

On the Front Range, the reliable exterior painting season runs roughly from May through September, when daytime temperatures are stable and overnight lows stay above freezing. Late spring and early fall are excellent windows; midsummer works too, as long as walls aren't coated in direct peak-afternoon heat.

Exterior painting in a Colorado winter is generally not advisable — coatings need temperatures (and overnight lows) above the manufacturer's minimum to cure properly, and freeze-thaw swings work against a fresh film. Winter is the ideal time for interior painting instead.

Inspect after any significant hailstorm, and do a broader check in spring and midsummer during Colorado's peak hail season. Look at south- and west-facing walls, plus soft-metal surfaces like fascia, gutters, and garage doors, for chips, pits, and dents. Documenting damage promptly also helps if you carry hail coverage.

Early fall — around September — is the time to re-caulk gaps at windows, doors, trim, and penetrations, before freeze-thaw cycling can drive moisture into any open joints.