The 3 am winter wake-up call — why it happens and 3 simple tricks to sleep through the night

A woman waking up in the middle of the night, looking at a small white alarm clock that says 3am.

As winter draws in, along with the nights, some of us can start to see changes in our sleep — and may even experience 3 am wake-ups.

So, why does this happen? With temperatures dropping and less daylight, colder months can affect our circadian rhythm (our internal body clock), making it harder to stay asleep through the night.