The next two weeks are expected to be warm and wet, and there could also be slight haze in the morning.
The National Environment Agency said in its latest weather forecast on Friday that, based on long-term statistics, May is the second warmest month in the year, after April.
“Singapore can also expect four or five days of short-duration, thundery showers in the afternoon, and two or three days of thundery showers in the morning,” it said.
The agency noted that rainfall for this month is likely to be “near-normal”, whereas about two-thirds of the country had more rainfall than usual last month.
Central Singapore, around Ang Mo Kio and Lower Peirce Reservoir, received the highest rainfall of 267mm to 324mm, about 55 to 80 per cent above average.
Eastern Singapore, around Pasir Ris and Simei, received the least rainfall of 67mm to 91mm, about 45 to 70 per cent below average.