Singapore, 16 November 2022 – Inter-monsoon conditions with low level winds that are light and variable in direction have been prevailing over Singapore since the last week of October 2022. Around the end of November 2022, the low-level winds are forecast to gradually strengthen and shift to blow mostly from the northeast or northwest. This change in monsoonal winds signal the start of the Northeast Monsoon season which typically extends into March 2023.
2 The second fortnight of November 2022 is not expected to be as wet as the first fortnight of the month. In the second half of the month, short-duration thundery showers are expected on some days in the afternoon and may extend into the evening on a few days. In addition, in the early part of the fortnight, low-pressure systems developing over the northern South China Sea are forecast to bring a temporary shift in the winds to blow from the southwest or west over Singapore and the surrounding vicinity. This may result in the passage of Sumatra squalls bringing widespread thundery showers with occasional gusty winds over Singapore between the early hours and early morning on a few days. With well above-average rainfall registered in the first half of the month and less wet weather to be expected for the second fortnight, the overall rainfall for November 2022 is likely be slightly above-average over most parts of the island.
3 For the rest of November 2022, the daily temperature is forecast to range between 24 degrees Celsius and 33 degrees Celsius on most days and may reach around 34 degrees Celsius on a few days when there is less cloud cover.
REVIEW (1 – 15 November 2022)
5 In the first fortnight of November 2022, inter-monsoon conditions prevailed over Singapore, with prevailing winds generally light and variable in direction. On some days, the low-level winds blew from the southwest or west.
6 The monsoon rain band was located over the equatorial Southeast Asia region and brought wet weather over Singapore on most days in the first half of November 2022. Large-scale convergences of winds over Singapore and the surrounding vicinity led to the development of several Sumatra squalls that brought widespread showers and gusty winds between the early and pre-dawn hours on many days. Thundery showers also fell over the island on several afternoons and nights. The Sumatra squall which brought gusty winds and heavy thundery showers in the early hours of 14 November 2022 resulted in a daily total rainfall of 157.2mm recorded around the Jurong West area. This was the highest daily total rainfall for the first fortnight of November 2022.
7 The daily maximum temperature was below 33 degrees Celsius on most days in the first half of November 2022 due to the rainy weather. There was only one day when the daily maximum temperature was higher than 34 degrees Celsius. In the first fortnight of November 2022, the highest daily maximum temperature of 34.3 degrees Celsius was recorded at Paya Lebar on 4 November 2022. The rainy weather and cloudy skies on 5 November 2022 brought the minimum temperature around Jurong area to a low of 21.8 degrees Celsius.
8 In the first half of November 2022, rainfall was well-above average for most parts of Singapore except in the southern part of the island, where rainfall was slightly below-average. The highest rainfall anomaly of 124 per cent above average was recorded at Woodlands. The anomaly was lowest at Sentosa at 15 per cent below average.
CLIMATE STATION STATISTICS
Long-term Statistics for November
(Climatological reference period: 1991 – 2020)
|Average daily maximum temperature:||31.2 °C|
|Average daily minimum temperature:||24.6 °C|
|Average monthly temperature:||27.2 °C|
|Average rainfall:||252.3 mm|
|Average number of rain days:||19|
Historical Extremes for November
(Rainfall since 1869 and temperature since 1929)
|Highest monthly mean daily maximum temperature:||32.3 °C (2019)|
|Lowest monthly mean daily minimum temperature:||22.4 °C (1933)|
|Highest monthly rainfall ever recorded:||521.5 mm (1874)|
|Lowest monthly rainfall ever recorded:||53.5 mm (1981)|