Finally, Winter is the best time visit to north of Thailand . Firstly, In the north of Thailand, say Chiang Mai and Chiang Rai, it might get cold enough that you’ll see frost. On a really windy cold night it might even get as low as 4°C (or at least it will feel that cold). Although many of us foreigners vacation in Thailand to flee the winter in our home country, Thais like to travel to northern Thailand to experience what cold weather is like. Even frost on the grass is a white wonder winterland for them. I’ve never heard of snow or even hail in Thailand, but perhaps it happens on very rare occasions? The southern-most regions of Thailand generally don’t have a cold season. It does on occasion rain during cold season, like 2-3 times per month.