The short answer
The two highest-impact windows for window cleaning in Charlotte are late spring, once pollen season has fully passed, and mid-to-late fall, after the hardwoods drop. Winter is a genuinely good time too: filtered-water cleaning works fine in the cold, and low winter sun makes dirty glass obvious from inside. Summer is fine for a mid-year touch-up. The one time to avoid is the peak of pollen season itself, because the glass re-coats within days.
Late spring — after the pollen
Charlotte's pollen season blankets everything for several weeks. Cleaning during it is a losing battle — the glass is hazy again in days. Once it clears (usually by late April into May), a clean resets the whole house and holds.
Fall — after the canopy drops
The mature oak and pine canopy sheds through fall, throwing sap, seed and leaf litter onto the glass and into the gutters. A clean once the trees are mostly bare sets the windows up for the brightest-light months.
Winter — underrated
Two reasons winter works. First, low-angle winter sun rakes across the glass and shows every bit of film from inside, so a clean is at its most noticeable. Second, filtered-water pole systems work in cold weather, so there's no technical reason to wait for spring.
Summer — touch-up only
Mid-summer is a fine time for a light touch-up if you host outdoors or have a room where the view matters, but it's not usually a primary visit.
Last reviewed September 2026. Written by the Aloe Cleaning team.