It was 24ºc so we booked the tickets and when the time came we threw our summer clothes into the suitcase and... Holy Crap! A quick check of the wether before we departed and the temperature had dropped to 12ºc! We were booked to go during a rare and short lived winter spell in Hanoi. I mean that literally, a week after we got back the temperature had returned to 24ºc. So we threw the swimming costumes out of the suitcase and packed sweaters instead. It was a bit depressing but we were going to have a good time anyway.