Am buggering off to Laos and Cambodia, leaving in 2 weeks, for about 2 months, and wanna know if I need to pack a jumper or tracksuit pants. Is it gonna be cold? Is it hot in the day, cold at night? i like to pack light. Am pretty much starting at the top of Laos and going to the bottom of Cambodia. An answer to this question would be very much appreciated.
I've been to Laos in both January and February and it CAN get quite cool at night, especially in the Luang Prabang area. I'm very sensitive to cold and had to wear several layers of clothes to stay warm some nights. Not sure if the weather will get that cold in November, but maybe by the end of the year.
If you stick to Siem Reap and Phnom Penh in Cambodia you won't feel much in the way of cooler temps. Maybe it will cool off a bit at night, but nothing too chilly. I'd say pack light and at least have some long trousers for the evening (help keep the mosquito bits at bay, too).
One pair of long trousers at least (if only, as buzzard says, to help prevent mozzie bites) for evenings and a jumper/fleece would be worthwhile, but you won't need much more.
I'm also a reasonably light packer, but always have at least one pair of trousers (normally zip offs, so they are multi-purpose and don't make me feel like i'm carrying a pair of trousers around for no reason) and a fleece - which can double as a pillow if needed on long bus rides and the like, which can be strapped to teh outside of my bag. I generally also have a long sleeved t-shirt, which i can wear in evenings especially in mozzie areas.
Coldest ever temperature recorded in Cambodia 8aside from on the mountains) was around +14 degrees C. Nov through April is hot and dry. Nov/Dec more bearable than towards April when it gets very humid.
In my opinion you will need no more than a light jacket or jumper to wear when watching the sunrise.
HOWEVER - good idea to pack long, light coloured trousers, long sleeved shirt and closed shoes (trainers or the like) for wearing at dawn and dusk for anti mosquito.