Monsoon season in the Valley usually runs through September, and by the end of it most homes have collected a season's worth of dust, water spotting, and debris. Some of that is cosmetic. Some is worth catching before it becomes a repair. Here is a practical checklist, roughly in order of what matters most.
Outside the House
Check the roof and gutters. Storm debris and blown grit collect at drainage points. Clogged drainage is the thing most likely to turn into an actual expense, so this one goes first even though it is the least interesting item on the list.
Look at your exterior vent terminations. Dryer vent covers and HVAC intake screens collect blown dust. A vent cover whose flapper is stuck open or packed with grit affects performance and is a five minute check.
Inspect stucco and paint. Blown grit is abrasive and driving rain finds weak points. Look for new cracking, chipping, or areas where water is getting behind the surface.
Walk your hardscape. Driveways, walkways, patios, and pool decks take the worst of it. Mineral deposits from hard water runoff and embedded dust build up over a season, and pavers hold grit in the joints. This is the point in the year when pressure washing does the most visible good.
Check irrigation and drainage grading. Storm runoff sometimes reshapes the ground near the foundation. Water should be moving away from the house.
Windows and Screens
Monsoon storms leave a specific kind of mess on glass: dust driven onto wet windows, then baked on by sun. It does not come off with a garden hose and it gets worse with each storm because each layer bonds to the last. Screens hold an enormous amount of fine dust after storm season and are easy to overlook, and dirty screens reduce airflow once you start opening windows in late October.
Inside the House
Change the HVAC filter. If you do one thing on this list, do this. Filters work hard during monsoon season, and a loaded filter stops capturing effectively and can restrict airflow enough to strain the system.
Look at your supply registers. Pull one or two vent covers and look inside. Visible debris accumulation is worth a conversation. If it looks reasonably clean, your system probably does not need duct work.
Dust high surfaces first. Ceiling fans, top of cabinets, door frames, and light fixtures collect the fine particulate that eventually falls onto everything below.
Tile and grout. Grit tracked in over a season is abrasive, and grout lines hold what mopping does not reach, especially in entryways and near the patio door.
Carpet and traffic lanes. Fine dust settles into fiber where vacuuming removes only part of it. Lanes near exterior doors carry the most.
Check for water intrusion signs. Window sills, the base of exterior walls, and ceilings below the roofline. Staining, bubbling paint, or a musty smell in a closet on an exterior wall are worth investigating sooner rather than later.
What to Prioritize If You Are Not Doing All of It
- HVAC filter. Cheapest, easiest, highest impact.
- Drainage and gutters. The only item that prevents a real expense.
- Water intrusion check. Catching it early is the difference between paint and drywall.
- Hardscape and exterior. Most visible improvement for the money.
- Interior deep cleaning. Worth doing, and it holds better once storm season is actually over.
That last point matters. There is not much sense having windows or exterior surfaces cleaned in the middle of August when three more storms are coming. Late September into October is when this work stops getting undone.