Singapore, 16 September 2024 – The prevailing Southwest Monsoon conditions are forecast to persist over Singapore and the surrounding region in the next fortnight with the low-level winds blowing from the south or west on most days.
2 In the early part of the coming fortnight, there may be a few days with little rainfall. Sumatra squalls may bring widespread thundery showers and gusty winds during the pre-dawn hours and morning on a few days. More rainfall is forecast in the latter half of the fortnight, with thundery showers expected on most afternoons. The thundery showers could be widespread and heavy on some of these days. The total rainfall for the second half of September 2024 is forecast to be above average over most parts of the island.
3 Daily temperatures are expected to range between 24 degrees Celsius and 34 degrees Celsius on most days. The wet weather may bring daily temperatures of between 23 and 32 degrees Celsius on a few days.
4 For updates of the daily weather forecast, please visit the MSS website (www.weather.gov.sg), NEA website (www.nea.gov.sg), or download the myENV app.
REVIEW OF THE PAST TWO WEEKS (1 – 15 SEPTEMBER 2024)
5 Southwest Monsoon conditions prevailed over Singapore and the surrounding region in the first half of September 2024, with the prevailing winds blowing mostly from the southeast or southwest.
6 Localised short-duration thundery showers fell over parts of the island in the late morning and afternoon on most days. On 4 September 2024, moderate to heavy thundery showers fell over many parts of Singapore in the late morning and early afternoon. The daily total rainfall of 57.4 mm recorded at Buona Vista that day was the highest rainfall recorded for the first half of September 2024.
7 The daily maximum temperatures in the first half of September 2024 were between 32 degrees Celsius and 34 degrees Celsius on most days. The highest daily maximum temperature of 35.2 degree Celsius was recorded at Pulau Ubin on 1 September 2024.
8 Most parts of Singapore recorded above average rainfall in the first fortnight of September 2024. Sentosa registered rainfall of about 77 per cent above average, and Paya Lebar registered rainfall of about 10 per cent below average.
CLIMATE STATION STATISTICS
Long-term Statistics for September
(Climatological reference period: 1991 – 2020)
| Average daily maximum temperature: | 31.6 °C |
| Average daily minimum temperature: | 25.2 °C |
| Average monthly temperature: | 28.0 °C |
| Average rainfall: | 124.9 mm |
| Average number of rain days: | 13 |
Historical Extremes for September
(Rainfall since 1869 and temperature since 1929)
| Highest monthly mean daily maximum temperature: | 33.0 °C (2019) |
| Lowest monthly mean daily minimum temperature: | 22.4 °C (1930) |
| Highest monthly rainfall ever recorded: | 440.4 mm (1988) |
| Lowest monthly rainfall ever recorded: | 22.8 mm (2019) |