Singapore, 1 December 2025 – The prevailing Northeast Monsoon conditions are expected to continue in the first fortnight of December 2025, with winds blowing mainly from the northwest or northeast.
2 Moderate to heavy thundery showers are expected over parts of the island in the afternoon on most days. The showers may extend into the evening on a few of these days. The total rainfall for the first fortnight of December 2025 is forecast to be near average over most parts of the island.
3 During the fortnight, the daily temperature is forecast to range between 24 degrees Celsius and 33 degrees Celsius on most days. Although thundery showers are expected on most days, the daily maximum temperature may reach around 34 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 (17 – 30 NOVEMBER 2025)
5 Inter-monsoon conditions prevailed over Singapore and the surrounding region in the middle of November 2025, with the prevailing winds generally light and variable in direction. In the last week of November 2025, the low-level winds gradually strengthened and blew mostly from the northwest or northeast. This change in monsoonal winds signalled the start of the Northeast Monsoon season.
6 In the second fortnight of November 2025, thundery showers fell over parts of the island on most days. Sumatra squalls also brought thundery showers and gusty winds over Singapore on some nights. On 17 November 2025, regional convergence of winds brought heavy thundery showers over many areas of Singapore in the afternoon. The daily total rainfall of 70.4 mm recorded at Clementi that day was the highest rainfall recorded for the second fortnight of November 2025.
7 The daily maximum temperatures in the second fortnight of November 2025 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 Paya Lebar on 29 November 2025.
8 Most parts of Singapore recorded below average rainfall in the second fortnight of November 2025. The area around Sembawang registered rainfall of 50 per cent below average, and the area around Sentosa registered rainfall of 59 per cent above average.
CLIMATE STATION STATISTICS
Long-term Statistics for December
(Climatological reference period: 1991 – 2020)
| Average daily maximum temperature: | 30.5 °C |
| Average daily minimum temperature: | 24.3 °C |
| Average monthly temperature: | 26.8 °C |
| Average rainfall: | 331.9 mm |
| Average number of rain days: | 19 |
Historical Extremes for December
(Rainfall since 1869 and temperature since 1929)
| Highest monthly mean daily maximum temperature: | 31.6 °C (2016, 2018) |
| Lowest monthly mean daily minimum temperature: | 21.9 °C (1933) |
| Highest monthly rainfall ever recorded: | 765.9 mm (2006) |
| Lowest monthly rainfall ever recorded: | 62.5 mm (1932) |