Answered by Dr Itender Pal Singh
I hear this one every winter, usually from a patient bundled up wondering how they still got sick. My honest answer: cold weather itself doesn’t directly cause colds — a virus does. But cold weather does make catching one more likely.
Here’s why colds spike in winter:
- People spend more time indoors, in closer contact with others, which makes it easier for viruses to spread
- Cold, dry air can dry out your nasal passages, making it slightly easier for viruses to take hold
- Some research suggests cold temperatures may modestly weaken the immune response in the nose and upper airway
My advice: Bundling up won’t hurt, but the more effective habits are the boring ones — washing your hands regularly, avoiding close contact with sick people, and keeping your immune system supported with good sleep and nutrition. That matters more than the temperature outside.
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