Singapore has no 4 seasons, everyday is just rain and shine.
While raining may sound cooling, it's actually not. Our humidity
rates are high (at least 80% every day). Be prepared to bathe at
least 3 times per day when you reach here. You may enjoy an ice
cream or two every day.
Customs wise... lots to learn. Observe. If in doubt, ask on the
Internet, never directly to them, god knows what you said that
pissed them off.
Food - The food forum here has a nice guide on foods that are nice
in Singapore. Most food here are spicy by default; if you never
say, chillies will be automatically added to your food. If you
don't want chillies, remember to tell the hawker. Restaurants
wise... I'm not too sure. Ask around.
Clothing - Hopefully you have heard about our 3 S. Shirt/singlet,
shorts, sandals/slippers. It's directly related to our
weather.
Fun - do whatever you like but don't get caught. The number 1 rule
here in Singapore, else you get into big trouble. The laws here are
strict and open to interpretation of any kind. If you are lucky,
you can get off lightly, otherwise, no.
Studies here - hmm... being independent helps a lot. And we love to
say Google is your friend. The libraries here may be your next best
friend. Jurong, Woodlands and Toa Payoh libraries have quite a huge
collection of books, so you need worry about your research.
National Library has a huge collection of books too.
Last thing you need to learn - our language aka Singlish. Singlish
is not just the lahs, lehs, lors added at the end of our sentences.
It is a mixture of Chinese, English, Malay, Tamil and our
dialects.
This website will help you figure out our language: http://www.talkingcock.com/