What to clean and when in a Columbia home, based on a late March last freeze, a wet and sticky July, fall beetles and a winter mild enough for projects.
The Midlands sits inland, so it misses the sea breeze that eases the coast, and summer here can feel like a long held breath. Spring and fall are short and pleasant. Winter is short and easy. Each of those gives a good window for certain jobs, and it helps to know which is which.
The numbers below come from NOAA normals at Columbia Metropolitan Airport. Treat this as a do-it-yourself list or as a way to time a professional visit.
The January normal high is 56.8 degrees, the normal low is 34.6 and the normal dew point is about 34. There are about 47 nights a year at or below freezing, and the snowfall normal is 1.2 inches, most of it now. Cool, dry air makes this a good time for projects that would feel miserable in July: clearing closets, washing curtains, moving furniture to vacuum and checking under sinks.
Change the furnace filter and vacuum floor vents. If a rare snow comes, use a boot tray for a day or two and wipe melt from wood floors.
The median last freeze falls around March 25, and pollen rises from there. AAFA ranked Columbia 27th of 100 metro areas in its 2026 report, with a worse than average score. Wash blinds and curtains, wipe window tracks and sills, change filters and leave shoes at the door when a yellow film appears on the car.
This is also the last comfortable stretch for bigger work. If you want a One-Time Deep Clean before the heat, book it for April or early May. Check that bathroom fans still run well, since they will be working hard soon. Clean any screens you plan to use, and check gutters and flower pots for standing water while the weather is pleasant.
June through August normal highs run from 89.7 to 92.7 degrees, and about 81 days a year reach 90 or hotter. July is the wettest month at 5.35 inches, and dew points near 69 or 70 degrees make bathrooms slow to dry. Run fans during and after showers, wipe down the shower walls and keep the air conditioning on when you travel.
Keep a mat and towels at the door you use most, since about 109 days a year bring measurable rain. Vacuum vents, wipe fan blades and change filters on a schedule. Storm season reaches inland as well. Hurricane Helene brought a 58 knot gust at the airport on September 27, 2024, and the storm guide has the steps to take before and after one.
When the air dries out, it is time to catch up. Fans, blinds, tracks and vents have carried the summer's load, and this is the most useful time of year for a deep clean. October also has its history, since the 2015 flood struck on October 1 to 5, so check that the storage in your lowest rooms is off the floor.
Bugs get busy now. Clemson Extension says kudzu bugs and multicolored Asian lady beetles gather around South Carolina homes in the fall. Seal gaps where you can, vacuum what gets in and do not crush them. The median first freeze comes around November 7. After that, bring in the porch furniture, give it a wipe and get ready for the quiet months. Rinse the doormats, wash the shower curtain and pull the sofa out one more time before guests come for the holidays. A home that gets this round of attention usually coasts through the cool weather with little more than routine dusting and a mop at the back door, even when a rare cold snap keeps everyone inside for days.
The questions Columbia homeowners ask most often about this topic, answered plainly.
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