Singapore, 15 December 2023 – The Northeast Monsoon conditions which prevailed since the start of December 2023 are expected to continue in the second half of the month, with winds blowing mainly from the northwest or northeast.
2 The current wet weather is likely to continue for the rest of the month. On most days in the fortnight, thundery showers are expected in the afternoon and may extend into the evening on some days. The thundery showers could be widespread and heavy on a few of these days. In addition, Singapore may experience windy conditions with brief periods of passing showers on one or two days during the fortnight. Overall, the rainfall for the second half of December 2023 is expected to be above average over most parts of the island.
3 For the coming 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 some 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 – 14 December 2023)
5 Northeast Monsoon conditions prevailed over Singapore and the surrounding region in the first fortnight of December 2023. During the period, the low-level winds blew mainly from the northwest or northeast on most days.
6 During the first two weeks of December 2023, Singapore experienced moderate to heavy thundery showers on most days. The showers fell mostly in the afternoon, and on few days, extended into the evening. The heavy thundery showers that fell over many areas of the island on 12 December 2023 resulted in a daily total rainfall of 89.9mm recorded at Woodlands. This was the highest total rainfall in a day for the first half of December 2023.
7 In the first fortnight of December 2023, the highest daily maximum temperature recorded was 35.5 degrees Celsius on 5 December 2023 at Admiralty. Lowest daily minimum temperature of 22.9 degrees Celsius was recorded at Admiralty and Choa Chu Kang on 3 December 2023.
8 Most parts of the island recorded above average rainfall in the first half of December 2023. Yio Chu Kang recorded rainfall of 110 per cent above average, and Punggol recorded rainfall of 33 per cent below 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) |
