Probably not what u wanted to hear, but: When i was there: 30°C at day, 28°C at night, 100% humidy. Not really a place i want to live.
I was in Singapore in April and I liked the weather. The people I worked for did tell me that in the summer the weather was not so good.
The startup scene tends to be more foreigner friendly. For corporates/enterprises it's a mixed bag because some of the rank and file locals view foreigners as people who have taken jobs/opportunities away from locals.
I was with people who worked for my customer, and except for site seeing I didn't do much except work. I very much enjoyed my visit.
it's a place to break up your marriage if you are in one :)
no empirical data, just experience of friends and people around them, and quite consistent