“On any day when you wake up and are able to see Doi Suthep clearly, it means that day’s weather is very good. But if on any given day you can’t see the mountain distinctly, or not at all, that’s bad weather: Wear your masks, my children.”
Indeed, that’s the very method we people of Chiang Mai use each morning to decide the state of the day’s weather.
Tourists and visitors are warmly invited to use the same methodology whenever they come to town.
It’s free of charge.