Singapore, 1 October 2024 – Inter-monsoon conditions are expected to set in during the first week of October 2024, as the Southwest Monsoon gradually weakens. The inter-monsoon period is characterised by light and variable winds as well as higher lightning activity.
2 Thundery showers are expected over parts of the island in the afternoon on most days in the first fortnight of October 2024. The showers may extend into the night on a few days. The total rainfall for the first fortnight of October 2024 is forecast to be above average over most parts of the island.
3 The daily maximum temperatures are likely to range between 32 degrees Celsius and 34 degrees Celsius on most days and slightly exceed 34 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 (16 – 30 SEPTEMBER 2024)
5 Southwest Monsoon conditions prevailed over Singapore and the surrounding region in the second fortnight of September 2024, with the prevailing winds blowing mostly from the southeast or southwest.
6 Thundery showers fell over parts of the island in the late morning and afternoon on most days. Sumatra squalls also brought widespread thundery showers and gusty winds over Singapore on a few nights. The squall on 17 September 2024 resulted in maximum wind gusts ranging from about 40km/h to 80km/h, with East Coast Parkway registering wind gusts up to 83.2km/h. On 24 September 2024, regional convergence of winds coupled with strong solar heating brought heavy thundery showers over many areas of Singapore in the afternoon. The daily total rainfall of 95.4 mm recorded at Jurong Pier that day was the highest rainfall recorded for the second fortnight of September 2024.
7 The daily maximum temperatures in the second fortnight of September 2024 were above 33 degrees Celsius on most days. The highest daily maximum temperature of 35.7 degree Celsius was recorded at Ang Mo Kio on 22 September 2024.
8 Most parts of Singapore recorded above average rainfall in the second fortnight of September 2024. Jurong West registered rainfall of about 120 per cent above average, and Somerset registered rainfall of about 40 per cent below average.
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CLIMATE STATION STATISTICS
Long-term Statistics for October
(Climatological reference period: 1991 – 2020)
| Average daily maximum temperature: | 31.8 °C |
| Average daily minimum temperature: | 25.0 °C |
| Average monthly temperature: | 27.9 °C |
| Average rainfall: | 168.3 mm |
| Average number of rain days: | 15 |
Historical Extremes for October
(Rainfall since 1869 and temperature since 1929)
| Highest monthly mean daily maximum temperature: | 33.0 °C (2002) |
| Lowest monthly mean daily minimum temperature: | 22.8 °C (1964) |
| Highest monthly rainfall ever recorded: | 497.1 mm (1947) |
| Lowest monthly rainfall ever recorded: | 10.8 mm (2002) |