Have you ever tried using a humidifier (at night or just in general)? Dry sinuses are way more susceptible to allergens, and there are plenty of ubiquitous allergens that could be responsible for your headaches no matter where you live.
I hate humidity, but during parts of my childhood was forced to tolerate a humidifier in winter; this had no noticeable effect. I once lived in Scotland for five months; same. No difference when I lived in Utah in the summer, in a home with regular AC or the one with the swamp cooler.
Have you ever tried using a humidifier (at night or just in general)? Dry sinuses are way more susceptible to allergens, and there are plenty of ubiquitous allergens that could be responsible for your headaches no matter where you live.
I hate humidity, but during parts of my childhood was forced to tolerate a humidifier in winter; this had no noticeable effect. I once lived in Scotland for five months; same. No difference when I lived in Utah in the summer, in a home with regular AC or the one with the swamp cooler.