Rain is not the thing that makes windows dirty
Clean rainwater does not usually make windows dirty on its own. The problem is dirt already sitting on the glass, frames and sills. When rain hits that dirt, it moves it around and leaves marks. Pure water window cleaning removes the dirt so the glass can dry clear, even if the day is not bright and sunny.
Why pure water still works
Pure water has had minerals removed, so it does not leave limescale spots as it dries. The brush loosens the dirt, then the rinse carries it away. Normal rain after that is not a problem. Heavy rain mixed with wind, unsafe conditions or storms are different and may mean the clean should be moved.
When rain is acceptable
Light or normal rain is usually fine for regular window cleaning. In fact, some customers are surprised how well windows dry afterwards. The important thing is that the cleaner still takes time with frames, sills and edges rather than rushing because the weather is poor.
When weather should stop the job
Heavy wind, lightning, unsafe access, icy paths or severe weather are good reasons to reschedule. The decision should be based on safety and quality, not just whether rain is falling. If the conditions mean the job cannot be done properly, moving it is the right call.
What customers should expect
For regular customers, a text or update helps avoid confusion. If the clean goes ahead in normal rain, the windows may take longer to dry, but they should still dry clear once the dirt has been removed.
Need a local quote?
If you are in Colchester, Stanway, Tiptree, Braintree, Marks Tey, Coggeshall, Kelvedon or a nearby Essex village, send Dan a few photos and your postcode. For most window cleaning, gutter clearing and smaller exterior cleaning jobs, photos are enough to give a clear price and sensible options without a long site visit. Include front and back photos, any awkward access, and whether you want a one-off clean or regular maintenance. Clear photos also help spot useful add-ons before the visit.