Singapore, 16 May 2025 – Inter-monsoon conditions are expected to continue in the second fortnight of May 2025, with winds mainly light and variable in direction, and blowing from the southeast or southwest on some days.
2 In the first week of the fortnight, Sumatra squalls may bring widespread thundery showers and gusty winds between the early hours and morning on some days. Thereafter, localised short-duration thundery showers are expected over parts of the island on a few afternoons. The total rainfall for the second fortnight of May 2025 is forecast to be near average over most parts of the island.
3 The daily maximum temperatures are likely to be around 34 degrees Celsius on most days, and reach 35 degrees Celsius on a few days.
4 For updates of the daily weather forecast, please visit the MSS website (https://www.weather.gov.sg), NEA website (www.nea.gov.sg), or download the myENV app.
REVIEW OF THE PAST TWO WEEKS (1 – 15 MAY 2025)
5 Inter-monsoon conditions prevailed over Singapore and the surrounding region in the first fortnight of May 2025. The prevailing winds were generally light and variable in direction.
6 Moderate to heavy thundery showers fell over parts of Singapore on most days. On 5 May 2025, regional convergence of winds brought heavy thundery showers over many areas of Singapore in the early afternoon. The daily total rainfall of 99.4 mm recorded at Bukit Timah that day was the highest rainfall recorded for the first fortnight of May 2025.
7 The daily maximum temperatures in the first fortnight of May 2025 were above 34 degrees Celsius on most days. The highest daily maximum temperature of 35.4 degree Celsius was recorded at Paya Lebar on 3 May 2025.
8 Most parts of Singapore recorded above average rainfall in the first fortnight of May 2025. The rainfall around Bukit Timah was about 170 per cent above average and the rainfall around Tengah about 60 per cent below average.
CLIMATE STATION STATISTICS
Long-term Statistics for May
(Climatological reference period: 1991 – 2020)
| Average daily maximum temperature: | 32.3 °C |
| Average daily minimum temperature: | 25.7 °C |
| Average monthly temperature: | 28.6 °C |
| Average rainfall: | 164.3 mm |
| Average number of rain days: | 15 |
Historical Extremes for Ma
(Rainfall since 1869 and temperature since 1929)
| Highest monthly mean daily maximum temperature: | 33.6 °C (1997) |
| Lowest monthly mean daily minimum temperature: | 23.5 °C (1974) |
| Highest monthly rainfall ever recorded: | 386.6 mm (1892) |
| Lowest monthly rainfall ever recorded: | 41.6 mm (1997) |