September is the best month of the year to get a North Bay home ready for winter, because it is still reliably dry. The Bay Area wet season runs roughly as early as late October through March, the heaviest rain usually falls between December and February, and a few hours of prep now can mean the difference between a cozy winter and a contractor phone call in the middle of a storm.
Start where the water starts
Work from the top down, and remember that water always finds the path of least resistance. If the gutters are full, the next storm gives it one: over the eave, down the siding, and straight toward your foundation or attic.
- Clean out gutters and downspouts so the first real storm flows freely, and check the flashing where the roof meets the chimney and the valleys.
- Look for branches that lean over the roofline. North Bay wind finds the weak limb every time.
- Make sure downspouts carry water several feet away from the slab, and that the ground slopes gently away from the foundation so it never sits in standing water.
- On country properties, give the well, septic, and drainage the same once-over, because a soggy leach field fails exactly when you need it most.
Walk the property like a mechanic
My years in an automotive shop taught me to look at the whole machine, not just the shiny part. That habit is exactly what I use on homes. Walk the lot after a storm and watch where the water pools, because on Novato and Petaluma hillsides that low spot is often the clue to a bigger drainage problem. Clear clogged catch basins and culverts before the leaves fill them again, and check that hillside swales are not blocked by years of debris.
Warm rooms, working detectors, tight seals
Service the furnace or heat pump now and change the filter, because the mild time to find out a heater is unhappy is September, not the first cold snap in December. Re-caulk around windows and doors, refresh weatherstripping, and run your hand along the frames on a dry day to feel the drafts. Test the smoke and carbon monoxide detectors while you are at it and replace any battery you doubt. Each of these jobs is small, and together they decide how comfortable the long rainy stretch feels.
Mark October 15 on the calendar
Rain is not the only thing to plan for. The Great California ShakeOut, billed as the world's largest earthquake drill, takes place Thursday, October 15, 2026, at 10:15 a.m. Whatever you are doing that morning, stop for a minute and practice Drop, Cover, and Hold On. It is the single best habit in earthquake country. While the reminder is fresh, secure the heavy piece of furniture that could topple, and put the water, flashlight, and batteries somewhere you will actually remember.
Whether your house is brand new or has been in the family for generations, the best time to notice a problem is while the weather is still dry. I look at homes every week with a mechanic's eye for the details that matter, and I am happy to give your property an honest read on what is worth doing now and what can wait. Love where you live, and keep the weather outside where it belongs.
Helpful next steps
“The house is always telling you what it needs while the weather is dry. The trick is listening before the storm.”
Peter Schardt
Written by
Peter Schardt
21 years in real estate, 100+ homes sold, and a lifetime in the North Bay. Sales Associate · 01702383 · California.
