Singapore, 15 August 2025 – The prevailing Southwest Monsoon conditions are expected to persist over Singapore and the surrounding region in the second half of August 2025, with low-level winds blowing from the southeast or southwest.
2 In the second fortnight of August 2025, short-duration thundery showers are expected between the late morning and afternoon over parts of the island on most days. On a few days, the passage of Sumatra squalls may bring widespread thundery showers and gusty winds between the pre-dawn and morning. The total rainfall for the second fortnight of August 2025 is likely to be near average over most parts of the island.
3 The daily maximum temperatures are likely to range between 32 degrees Celsius and 34 degrees Celsius on most days. A few nights may be warm and humid, and the temperatures may stay above 28 degrees Celsius.
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 AUGUST 2025)
5 Southwest Monsoon conditions prevailed over Singapore and the surrounding region in the first fortnight of August 2025, with winds blowing mostly from the southeast or southwest.
6 In the first fortnight of August 2025, localised short-duration thundery showers fell over parts of the island on most afternoons. There were few days when Sumatra squalls brought widespread thundery showers and gusty winds over Singapore in the pre-dawn and morning. On 13 August 2025, widespread thundery showers from a Sumatra squall fell over many parts of Singapore in the early and pre-dawn hours. The daily total rainfall of 78.6 mm recorded at Pasir Laba that day was the highest rainfall recorded for the first fortnight of August 2025.
7 There were several warm days where the daily maximum temperature was above 34 degrees Celsius in the first fortnight of August 2025. The highest daily maximum temperature of 35.8 degree Celsius was recorded at Paya Lebar on 2 August 2025. This temperature reading is the highest daily maximum temperature for the month of August, exceeding the previous August high of 35.4 degrees Celsius, set on 10 August 2016 at Seletar and Admiralty on 9 Aug 2020.
8 The rainfall was above average over some parts of the island in the first fortnight of August 2025. The area around Jurong registered rainfall of 80 per cent above average, and the area around Somerset registered rainfall of 49 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) |