I've told this before, but one of my worst "cold weather" experiences has been in Thailand. When I was there one January, at nights the temperatures might go down to like 10-14 C degrees (at daytime they were at a nice 26-30 C or so). The "low" night temperatures were a real problem there as the houses had no heating whatsoever nor insulation, so basically at nights it was around that 10-14 C degrees inside as well.

Naturally I didn't have much warmer clothes with me besides T-shirts and such (I had one pair of jeans and a leather jacket which were packed away), and the blankets in the motel were like thin towels. So yeah, I felt like I was freezing to death there at nights.

I guess thai homes are mostly made to stay cool at hot temperatures, rather than warm at lower temperatures. Here in Finland it is vice versa: if the temperatures get up to 25 C or so in the summer, inside it might be 30 C or more even if you keep the windows open. The houses are designed to stay wam at winters, not so much to stay cool in the (short) summers.

Currently it is pretty warm in Finland, has been quite some time. Around 28-32 C degrees daytime, and night temperatures also over 20 C. It has been like this for a couple of weeks, and still continuing. This reminds me that I must buy and install an aircon system to my home, mainly for these warmer days in the summer. It is not unbearable inside right now (pretty nice actually in a t-shirt, with a fan blowing at me), but nights tend to be too warm for me. I am usually soaking wet with sweat at nights, and I hate it. I want to get the night temperatures down to 22 C or so inside, and get the humidity out of the air. Then I can sleep better.

The aircon systems here are useful also in the winter as they help heating the home at winter, and use less electricity for that than normal heaters. The aircon systems I've seen in Thailand can only cool down, not warm up, the air. Including the aircons in Thai cars.