A calendar built from NOAA normals
A Wet-House Checklist for Each Season
Carrollton's rain and cold arrive on a pattern. This page puts the NOAA monthly numbers beside the checks that UGA Extension, the EPA and the National Weather Service print, so each season has a short list.
December to February: cabinets, hoses and the main valve
Carrollton counts 15.9, 17.7 and 13.2 nights at or below 32 °F in December, January and February. UGA Extension advises disconnecting garden hoses, shutting off and draining outdoor faucets, opening cabinet and laundry closet doors, and leaving at least one faucet dripping. Texas AgriLife Extension adds that the main water valve outside the house is worth locating before it is needed.
NOAA NCEI, 1991-2020 monthly normals, Carrollton station USC00091640
UGA Extension Forsyth County, Protect water pipes from freezing (1 Nov 2017)
Texas AgriLife Extension, Winter storms: preventing and thawing frozen pipes
March to May: rain and the roofline
March is the wettest month at 5.59 inches, April brings 4.59 and May 3.77. UGA Extension's checklist asks for gutters and downspouts kept clear of debris. It also asks for downspouts that end 6 to 10 feet beyond the foundation, and for a roof check for pooling water and for missing or curling shingles. The National Weather Service says hail peaks in May.
NOAA NCEI, 1991-2020 monthly normals, Carrollton station USC00091640
UGA CAES, Mold and moisture home inspection checklist (Circular 1083)
June to August: drain lines and humidity
Rain runs 4.13 inches in June, 4.45 in July and 3.68 in August, with 36.0 days a year above 90 °F. The EPA's mold guide lists clean drip pans and clear drain lines on air conditioners, and it sets the target for indoor humidity at 30 to 50 percent, never above 60. A humidity meter costs about $10 to $50. UGA Extension adds that the auto fan setting beats the constant one.
NOAA NCEI, 1991-2020 monthly normals, Carrollton station USC00091640
NOAA NCEI, 1991-2020 annual and seasonal normals, Carrollton station USC00091640
EPA, A brief guide to mold, moisture and your home (updated 18 Feb 2026)
September to November: the walk-around
Rain eases to 3.83, 3.66 and 4.39 inches. These are good months for a walk-around with UGA's inspection list. It covers the drip pan under the water heater, washer and dishwasher lines and the dryer vent. It also names the sump pump, the floor drain and a 6-8 mil vapor barrier over crawl space soil. The same list asks for heating and cooling systems to be serviced twice a year.
NOAA NCEI, 1991-2020 monthly normals, Carrollton station USC00091640
UGA CAES, Mold and moisture home inspection checklist (Circular 1083)
Any month: the meter and the dye test
Carrollton's utilities page walks through a meter test: turn off all water, then read the meter. A digital meter showing a rate other than zero, or an analog meter whose red sweep hand moves, means water is flowing. Its toilet dye test lets food coloring sit in the tank for 6 hours without flushing; the EPA's version waits 10 minutes.