the average low is 25 degrees C and the average high is 31 degrees Cit can be as high as 35 degrees C in a July afternoon and can be 19 degrees C in a December dawn.So which month you are asking?The weather in Singapore are almost the same every months, can the temperature reach 40 degree C in Singapore, coz in my hometown, the weather reaches 40 degree C or above every summer, but i felt that the weather in Singapore is hotter than that in my hometownthe highest temperature rarely reached 36 degrees C.It is the humidity that make you feel uneasy. The humidity in Singapore is usually above 80 while in your hometown could be much below 80I think so, thx. R u SingaporeanI stay in Singapore and China long enough to know the facts