It never ceases to amaze me how "winter" is subjective and relative. Many Thai people are talking about how "winter has come" and "how cold it is". I honestly don't think that 70 degrees (21 C) qualifies as winter. Finally, I am just getting comfortable.
There are kiosks at the shopping centers selling gloves, mittens, scarves, and knit caps. My daughters are begging for gloves "because it's winter!" I have been in Bangkok and mentioned that I live in Chiang Mai and everyone, without exception says, "Ooh, it is cold in Chiang Mai!".
I will admit it is nice and cool at night. We are able to sleep quite comfortable with just a fan in the window. It got all the way down to 73 F in our house this morning. Yes, indeed, winter has come. Break out the hot chocolate and ear muffs.