Chiang Mai Weather / Chiang Dao Weather

Please see the following page for Chiang Mai weather ...http://www.bbc.co.uk/weather/world/city_guides/results.shtml?tt=TT002900

For Chiang Dao you can normally take off 2 degrees.

If you are trekking, nights up the mountain in the villages can be another 1 or 2 degrees off that.