As the rainy season sets in, so does the familiar wave of sneezing, sore throats and runny noses. Many people notice that they or their children seem to catch colds more often when it’s wet and chilly outside – but why does this happen?
Firstly, it’s important to understand that colds are caused by viruses, not by rain or cold air itself. The most common culprit is the rhinovirus, but other viruses can also cause cold-like symptoms. What changes during rainy weather is the environment, and this plays a big role in how these viruses spread.
During rainy or cold weather, people tend to stay indoors more often. This means we’re in closer contact with others in enclosed spaces – at home, school, work or on public transport.
This proximity makes it easier for viruses to pass from one person to another through coughing, sneezing or touching shared surfaces.
Rainy weather is also usually accompanied by lower temperatures, which can slightly weaken the body’s natural defences. Cold air may dry out the nasal passages, making it easier for viruses to enter and cause infection. Some studies suggest that viruses like the rhinovirus may even survive longer in cooler, less humid conditions, increasing the chance of transmission.
Another factor is the drop in sunlight exposure. Rainy days mean less time in the sun, which can affect vitamin D levels – and vitamin D plays a role in supporting the immune system. A weaker immune response may make it easier to catch a cold or take longer to recover.
It’s also common for people to delay drying off or changing wet clothes, especially children. Staying in damp clothing for long periods can make the body feel cold and uncomfortable – though it doesn’t directly cause colds, it may stress the body and make it slightly more susceptible to illness.
While colds are usually mild and clear up on their own, they can be uncomfortable and disruptive, especially for children. During the rainy season, it’s helpful to maintain good hygiene, eat well, get enough rest and stay warm and dry.
So, the next time someone catches a cold when it rains, remember – it’s not the rain itself, but what we do during rainy days that makes the difference.
📩 Dr Lulu contact: healthdiaries@yahoo.com
