That’s because changes in temperature and barometric pressure are big triggers. They have an effect on nerves and blood vessels. Plus, the dry air this time of year can make you more prone to sinus issues that can also trigger headaches. The best thing you can do is to stay hydrated – and to keep a humidifier in your bedroom. That’ll help your sinuses. And if you know a storm is coming, pop some ibuprofen ahead of time.