- Fortnightly Outlook
WEATHER OUTLOOK (17 – 31 January 2022)
1 The prevailing Northeast Monsoon season is expected to continue through January 2022, with the low-level winds blowing from the north or northeast. Generally dry conditions are expected for the second fortnight of January, although short-duration thundery showers can be expected over parts of the island on one or two days.
2 During the fortnight, the monsoon rain band is forecast to be located to the south of the equatorial Southeast Asia region. The presence of a dry air mass in the surrounding vicinity of Singapore will bring relatively fair weather on most days, except for occasional passing showers in the afternoon. Windy conditions can be expected in the first week of the fortnight. On one or two days, there may be short-duration thundery showers over parts of the island in the afternoon and evening due to convergence of prevailing winds with the sea breeze. Overall, the rainfall for January 2022 is expected to be below-average over most parts of the island.
3 In the second half of January 2022, the daily temperature is forecast to range between 24oC and 33oC on most days. On days with lighter winds, the daily maximum temperature may be higher, and reach around 34oC.
REVIEW (1 – 16 January 2022)
5 Northeast Monsoon conditions prevailed over Singapore and the surrounding region in the first half of January 2022. The low-level winds blew from the north or northeast.
6 Between 31 December 2021 and 2 January 2022, a surge of moderate to strong northeast winds over the South China Sea brought cool and wet weather over Singapore. On 2 January 2022, widespread and continuous moderate rain fell over the island between the pre-dawn hours and afternoon. A total of 101.2mm of rainfall was recorded at Lower Peirce Reservoir. The minimum temperature of 22.8oC, recorded at Clementi that day, was the lowest minimum temperature recorded in the first fortnight of January 2022.
7 After a wet start to the new year of 2022, the second week of January 2022 was generally fair, with brief periods of afternoon passing showers. There were also occasionally windy conditions on several days. The highest maximum temperature of 34.5oC was recorded at Sentosa on 13 January 2022.
8 The rainfall in the first half of January 2022 was below-average over most parts of the island, except for northern and central Singapore, where rainfall was above-average. The highest anomaly of 82% above average was recorded at Ang Mo Kio. The anomaly of 34% below average was recorded at Chai Chee.
CLIMATE STATION STATISTICS
Long-term Statistics for January
(Climatological reference period: 1991 – 2020)
|Average daily maximum temperature:||30.6 °C|
|Average daily minimum temperature:||24.3 °C|
|Average monthly temperature:||26.8 °C|
|Average rainfall:||221.6 mm|
|Average number of rain days:||13|
Historical Extremes for January
(Rainfall since 1869 and temperature since 1929)
|Highest monthly mean daily maximum temperature:||31.8 °C (1998, 2016)|
|Lowest monthly mean daily minimum temperature:||21.6 °C (1934)|
|Highest monthly rainfall ever recorded:||818.6 mm (1893)|
|Lowest monthly rainfall ever recorded:||15.4 mm (1997)|