A month-by-month cleaning calendar for Chattanooga homes, built from local climate normals, the April and May pollen peak, muggy summers, leaf season and the storms the area has weathered.
Chattanooga does not have a dry season or a snowed-in season. It has a wet, pollen-heavy spring, a humid summer, a fall full of leaves and a mild, damp winter, and each one leaves a different kind of mess inside a house.
This calendar uses the 1991 to 2020 climate normals for the Chattanooga airport station and local pollen reporting to lay out what to clean, and when, through the year.
Chattanooga's normal annual precipitation is 55 inches. March is the wettest month at about 5.3 inches, December and July are close behind, and October is the driest at about 3.6. The normal July high is about 90.5 degrees, and the city averages 46 days a year at 90 or above.
On the cold side, the normal January low is about 32 degrees and the city sees about 59 nights at or below freezing. The median last freeze is March 24 and the median first freeze is November 9, which frames the stretch when porches, screens and decks are in use.
With a January low near freezing and only about 3.6 inches of snow in an average year, winter here is more wet than white. It is a good time for indoor detail: wipe the tops of door frames and kitchen cabinets, wash bath mats and shower curtains, and vacuum heating vents and return grilles while the furnace is working hardest. Keep a sturdy mat at each door for wet shoes.
March averages about 5.34 inches of precipitation, the most of any month, and the median last freeze falls on March 24. It has also produced the city's record snowfall: 18.5 inches fell on March 13, 1993.
Tree pollen starts building, and a Chattanooga allergist told local news in 2025 that trees are releasing pollen earlier and in larger amounts than before. Swap worn winter door mats for fresh ones, clean window tracks before the yellow film shows up, and replace the HVAC filter.
Local reporting with area allergists names April and May as the hardest months, with tree pollen from the wooded mountains around Hamilton County. The Asthma and Allergy Foundation of America ranked Chattanooga 16th among large metros for seasonal allergies in 2025.
During these weeks, keep windows shut on high-pollen days, wipe sills and window tracks weekly, dust ceiling fan blades before running them, wash pet bedding often and leave shoes at the door. Schedule a deeper clean once the yellow film tapers off, so the result lasts. The allergy cleaning guide goes further.
Spring storms are part of the picture too. On Easter night, April 12, 2020, an EF-3 tornado tracked about 20 miles from Fort Oglethorpe, Georgia, through southeast Chattanooga to Ooltewah. Keep a flashlight and a clear path to the safest interior room, and leave storm damage to contractors.
Average dew points climb to about 65 degrees in June, 69 in July and 68 in August before easing to about 62 in September. That air keeps bathrooms, towels and closets damp. Run exhaust fans well after every shower, hang towels to dry rather than piling them, wipe shower glass and corners, and rinse kitchen trash cans more often, since heat speeds up odors. The humidity and mildew guide has the full routine.
Late summer can bring extremes. The city's record one-day rainfall, 9.49 inches, fell on September 5, 2011. After a heavy rain, check entries and any below-grade rooms for water, and dry wet rugs fully before they go back down.
October is the driest month, at about 3.6 inches, which makes it the best window for outdoor jobs such as washing porch furniture, screens and outdoor mats. Leaves follow: Signal Mountain runs its fall leaf collection from mid-October to about mid-January, and leaf bits travel indoors the whole time.
The median first freeze is November 9. Before holiday guests, schedule a deep clean in November, then lighter upkeep through December, one of the wettest months at about 5.25 inches.
The questions Chattanooga homeowners ask most often about this topic, answered plainly.
TotalCare Cleaning will service Chattanooga and surrounding areas with background-checked cleaners and is insured up to $1 million. Re-clean guarantee: if we missed something, tell us by the end of the next day and we come back to fix it. Beyond Clean. TotalCare.
