I'm writing from haven restaurant at the moment. Great place to eat while you're here for a good cause. Anyway, the weather right now is very cloudy through out the day with occasional showers. When I went to taphrom and angkor wat it rained the entire day and I didn't bring any rain gear. Didn't stop me from walking around however.
Please do bring proper shoes to walk because the steps are steep and now it's somewhat slippery. Unfortunately a couple days ago a Japanese tourist died falling down a flight of stairs at one of the temples. (bless her soul) proper attire to the temples is imperative when going temple visiting. Sorry to be morbid but I have to warn you.
Avoid pub Street while you can. Do some research on TA for good places to eat, I noticed many if them are located around pub Street and not in it. There's a decent place called CTV in a small Street opposite lucky mall (not hard to find even for a first timer like myself. It means Chinese, Thai, Viet and whilst they don't serve Khmer cuisine, they make some wonderful dishes there and the store owner, Nop is such a wonderful guy to talk to. Had a couple of beers with the fellow already.
If you can and are adventurous, perhaps taking a quad or a dirt bike round the countryside. That's where you'll find the heart and soul of Cambodia. It's a beautiful country side even with the downcast weather.
The people here are so friendly and i made many friends here already. Just beware of the ever persistant tuk tuk drivers. That's th e only thing so far that drives me up the wall. On another note, the children and the temples themselves. Never buy anything from them unless you want around 20 or more of them swarming around you asking you to buy stuff. There are other ways to contribute to the Khmer community.
I'm sure you'll have a great time there. Mine is ending tomorrow and I'm sad to go already.