It is a cold and dry monsoon from the north east which has been inflecting the weather here at the south china sea. I know it sound like a bad joke to people from norther
Another thing about the 13 degrees here, is that it feels like -3 as it is still humid and moist, and that wet cold just goes through skin and bones. The 3rd thing is the houses; they are not at all built to keep anything in or out and the cold wind just rushes through the ventilation fans and where else it can. And if yoiu turn on a heater, the heat goes the same way just out, so if you don't cover your self in blankets and kind of building a tent around you and the heater, you can just forget about trying to get warm.
The good thing is; the temperature will go up again as quick as it went down, so next week tuesday, we might again enjoy 23 to 25 degrees, and again put the warn coats in the bag and hide it under the bed untill next time.