Region	NOAA 2026-2027 outlook (Dec–Feb)	Indoor air watch-out	Home action
South, Southern Plains & Southwest	Wetter than average favored; drought may ease	Rising humidity, leaks and mold after storms	Keep humidity under 50%; check attics and crawlspaces after heavy rain
Southeast incl. Florida	Near-normal temperatures; wetter than average	Damp air and mold-friendly conditions	Run bath and kitchen exhaust fans; fix moisture sources first
East Coast & Northeast	Warmer than average; wetter than average	Window condensation; long heating run times	Check your filter monthly; watch for condensation on cold surfaces
Midwest & Mississippi Valley	Warmer than average favored	Heating still runs daily; indoor dust and dander build up	Stick to a regular filter change schedule; vacuum vents and returns
Great Lakes	Warmer than average; parts drier than average	Dry indoor air and static	Keep humidity at or above 30%; clean humidifiers often
Pacific Northwest & Northern Rockies	Warmer than average; drought may worsen in spots	Dry air indoors; dust	Monitor humidity; keep returns clear and the filter fresh
Alaska	Warmer than average; drier than average	Long, sealed-up heating season	Check the filter monthly and test CO alarms

When	What NOAA releases	What to do at home
Now (early November)	Winter outlook issued October 15	Fresh filter, CO alarm test, furnace tune-up, hygrometer in place
November 12	El Niño update	Wet-region homes: clear gutters so water drains at least 5 feet from the foundation
November 19	Updated seasonal outlook	Recheck your row in the regional table and adjust your humidity plan
Mid-December and mid-January	Monthly outlook updates	Check your filter; replace it if it looks dirty
Any time a Winter Storm Watch posts	National Weather Service alert	Order filters and clear outdoor vents

Term	Definition
NOAA	The National Oceanic and Atmospheric Administration, the U.S. agency that runs the National Weather Service and issues the official winter outlook.
Climate Prediction Center (CPC)	The NOAA office that produces seasonal temperature and precipitation outlooks and monitors El Niño.
El Niño	A climate pattern in which tropical Pacific waters run warmer than normal, shifting weather worldwide.
Jet stream	A fast band of high-altitude wind that steers storms across North America.
Meteorological winter	December through February, the three coldest months on average in the Northern Hemisphere.
Relative humidity	How much moisture the air holds compared with its maximum at that temperature, as a percentage.
Hygrometer	An inexpensive device that measures indoor relative humidity.
HVAC	Heating, ventilation and air conditioning, the system that heats and circulates air through a home.
CO (carbon monoxide)	A colorless, odorless gas produced when fuel burns; only a CO alarm can detect it.
EIA	The U.S. Energy Information Administration, the federal agency that forecasts household energy costs.
MERV	Minimum Efficiency Reporting Value, a 1–16 scale rating how well an HVAC air filter captures particles of different sizes.

Trouvez le bon filtre pour l’hiver

TL;PL