Wet Weather Expected to Continue in the First Half of October 2022

Singapore, 30 September 2022 – The current wet weather is expected to continue in the first half of October 2022. During this period, thundery showers are expected on most days. The prevailing Southwest Monsoon conditions are forecast to persist over Singapore and the surrounding region in the next fortnight with the low-level winds blowing from the south or west on most days.

2    In the first half of October 2022, thundery showers can be expected between the morning and early afternoon on most days. In the first weekend of October 2022, the convergence of low-level winds in the region could bring moderate to heavy thundery showers over Singapore in the afternoon. In the latter half of the fortnight, Sumatra squalls developing in the Strait of Malacca may bring widespread thundery showers with occasional gusty winds as they pass Singapore between the pre-dawn hours and morning on some days. The total rainfall for the first fortnight of October 2022 is forecast to be above average over most parts of the island.

3    During the fortnight, the daily temperature on most days is forecast to range between 24 degrees Celsius and 33 degrees Celsius. The wet weather may bring daily temperatures of between 23 and 32 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 (1 – 29 September 2022)

5    In September 2022, Southwest Monsoon conditions prevailed over Singapore and the surrounding region, with the low-level winds blowing mostly from the southeast or southwest.

6    There were more showers in the second half of September 2022 compared to the first half of the month. On several days of the month, moderate to heavy thundery showers affected the island in the morning, extending into the early afternoon on a few days. On the Sunday mornings on 18 and 25 September 2022, large-scale convergence of winds over Singapore and the surrounding region brought widespread heavy thundery showers with more than 100 mm of rain over parts of Singapore. The highest daily total rainfalls of 123.6 mm and 127.6 mm were recorded around West Coast Road on 18 September 2022 and around Tuas South on 25 September 2022 respectively. These were the highest daily total rainfalls for September 2022.

7    In September 2022, the daily maximum temperature was below 33 degrees Celsius on most days due to the rainy weather. The wet weather brought several days with cool night time temperatures. There were 21 days with daily minimum temperatures of 24 degrees Celsius or less. The temperature at Jurong West dropped to 21.6 degrees Celsius during the morning showers on 25 September 2022. That was the lowest daily minimum temperature for September 2022.

8    The rainfall was above average for many parts of the island in September 2022. The highest rainfall anomaly of 93 percent above average was recorded at Lower Pierce Reservoir. The anomaly was lowest at Chai Chee at 23 percent below average.






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 (1942)
Lowest monthly rainfall ever recorded: 10.8 mm (2002)