Singapore, 16 August 2023 – The drier weather conditions experienced in the first half of August 2023 are likely to continue into the second half of the month. During the coming fortnight, the prevailing Southwest Monsoon conditions are expected to persist, with the low-level winds over Singapore blowing from the southeast or southwest.
2 In the second fortnight of August 2023, the monsoon rain band is forecast to lie over the northern Southeast Asia region, resulting in less rainfall over Singapore. Short-duration thundery showers are expected between the late morning and afternoon over parts of the island on some days. In the middle of next week, the presence of a dry air mass over Singapore and the surrounding region may bring a few fair weather days to Singapore. The passage of Sumatra squalls may bring widespread thundery showers and gusty winds on one to two mornings. On the whole, we expect below average rainfall in the second half of August 2023. For the month of August, the total rainfall is expected to be well below average over most parts of the island.
3 Warm conditions are expected on most days in the second half of August 2023, with daily maximum temperatures ranging between 33 and 34 degrees Celsius. The daily maximum temperature could reach a high of around 35 degrees Celsius on a few days. Several nights may also be warm, particularly when the prevailing winds blow from the southeast or south, and bring warm and humid air from the sea. Night-time temperatures of around 28 degrees Celsius can be expected on these nights, particularly over the south-eastern parts of the island.
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 – 15 Aug 2023)
5 Southwest Monsoon conditions prevailed over Singapore and the surrounding region in the first half of August 2023, with low-level winds blowing mostly from the southeast or southwest.
6 In the first half of August 2023, localised short-duration thundery showers fell over parts of the island in the late morning and afternoon on several days. Heavy localised thundery showers fell over eastern Singapore in the early afternoon on 13 August 2023. The daily total rainfall of 84.4 mm recorded at Simei that day was the highest rainfall recorded for the first fortnight of August 2023.
7 The daily maximum temperature in the first half of August 2023 ranged between 33 degrees Celsius and 34 degrees Celsius on most days. The highest daily maximum temperature of 34.4 degrees Celsius was recorded at Admiralty on 6 August 2023. There were also several warm nights, particularly over the southern and eastern parts of the island where the minimum night-time temperatures ranged between 28 degrees Celsius and 29 degrees Celsius.
8 Most parts of Singapore recorded below average rainfall in the first fortnight of August 2023. Simei recorded rainfall of 14 per cent above average, and MacRitchie recorded rainfall of 82 per cent below average.
CLIMATE STATION STATISTICS
Long-term Statistics for August
(Climatological reference period: 1991 – 2020)
| Average daily maximum temperature: | 31.4 °C |
| Average daily minimum temperature: | 25.3 °C |
| Average monthly temperature: | 28.1 °C |
| Average rainfall: | 146.9 mm |
| Average number of rain days: | 14 |
Historical Extremes for August
(Rainfall since 1869 and temperature since 1929)
| Highest monthly mean daily maximum temperature: | 32.7 °C (2019) |
| Lowest monthly mean daily minimum temperature: | 23.0 °C (1962) |
| Highest monthly rainfall ever recorded: | 526.8 mm (1878) |
| Lowest monthly rainfall ever recorded: | 11.8 mm (2019) |