Believe it or not, mold growth in winter and can actually increase. In the colder months, houses are shut up they become increased mold hazards. The cold weather can limit the production and spread of mold spores, but the mold spores that are already inside the house cannot escape. They can attach and grow. When mold attaches to dampened areas in the kitchen or bathrooms they can feed off of the moisture. With the advent of energy efficient sealants, houses can become stuffy. This stuffiness is the raising of moisture collecting and humidity rising.
Mildew and mold growth in the winter increases as winter approaches. Condensation and moisture from raised humidity levels increases the breeding ground for mold for an extended period of time. The environment of fall and winter provide the right air quality for mold production to rise. It is the job of mold to break down dead plant matter. Wood is basically dead plant matter. The decaying leaves from outside are constantly releasing mold spores and some of them will get into the house to do what they are intended inside a home. Unfortunately for home owners, this can lead to allergy triggers.
Mold growth in winter can be found in many common indoor spaces. If someone wants to remove the mold they should check out the dry wall, sheet rock and other surfaces of rooms where there are corners or bends. Corners are more exposed to c older air than the rest of the room. Corners are also less likely to receive air circulation. When two or more adjoining rooms are left open between each other they can pass along the growing mold between them all winter. Corners have a higher relative humidity than other parts of a room. The higher relative humidity becomes the perfect combination of water vapor which harvests and sustains mold.
Those who want to prevent mold growth in winter should keep their indoor humidity below 60%. Ideally, the indoor humidity should be between 35% and 45%. A dehumidifier can bring the moisture lower than what it might be naturally. This can take down the mold growth significantly. Ductwork and filters should be cleaned regularly. Ceiling fans should be set to spin in reverse to draw air up. Water should not be allowed to stand in pans for long periods of time. Taking these kinds of measures can help to limit the amount of mold growing in the winter.