To go from -33 degrees C to 0 degrees C would be a rise of 33degrees. Then going from 0 degrees C to 37 degrees C would be a rise of 37degrees. so altogether the rise in temperature would be 33+37=70 degrees
Usually it is around 30oC highest daily temperature around 32oC or 33oC although it might reach 35oC in rare cases.
(v1/t1) = (v2/t2)
The average temperature of Singapore is about 23°C to 31°C. Singapore is summer all-year-round as it is located near the Equator, and its rainy seasons are during May to July and end-October to early-February.