Warm Conditions with Short-Duration Thundery Showers Expected in the Coming Fortnight

Singapore, 1 August 2023 – The prevailing Southwest Monsoon conditions are expected to persist over Singapore and the surrounding region in the coming fortnight, with low-level winds continuing to blow from the southeast or southwest.

2     Localised short-duration thundery showers are forecast over parts of the island in the late morning and afternoon on some days during the first half of August 2023. On a few of these days, the thundery showers may be widespread and intense, when there is large-scale convergence of winds over Singapore and the surrounding region. Widespread thundery showers with gusty winds due to Sumatra squalls may occur between the pre-dawn hours and morning on one or two days. The presence of a dry air mass over Singapore and the surrounding region may bring relatively fair and warm weather to Singapore on a few days. Overall, the rainfall for the first fortnight of August 2023 is likely to be slightly below average over most parts of Singapore

3     Warm conditions with daily maximum temperatures of around 34 degrees Celsius are expected on most days in the first two weeks of August 2023. The daily maximum temperature could reach a high of around 35 degrees Celsius on a few days. Warm and humid conditions are also expected on some nights in the coming fortnight. Warm nights typically occur when the prevailing winds blow from the southeast and bring warm, humid air from the sea over the land. On these nights, the temperatures may stay above 29 degrees Celsius, particularly over the southern and eastern coastal areas 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 – 31 July 2023)

5     Southwest Monsoon conditions prevailed over Singapore and the surrounding region in July 2023, with low-level winds blowing mostly from the southeast or southwest.

6     In July 2023, thundery showers fell over parts of the island in the late morning and afternoon on most days. On 20 July 2023, convergence of winds over the surrounding region brought widespread thundery showers to Singapore in the morning. The daily total rainfall of 124 mm recorded at Tuas that day was the highest rainfall recorded for July 2023.

7     There were five days in July 2023 when the daily maximum temperature reached 34 degrees Celsius or more. The highest daily maximum temperature of 35.4 degrees Celsius was recorded at Choa Chu Kang and Clementi on 5 July 2023. There were also several warm nights, particularly during the last week of July 2023, where the minimum night-time temperatures ranged between 28 degrees Celsius and 29 degrees Celsius over the southern and eastern parts of the island. The lowest minimum temperature was 21.8 degrees Celsius recorded at Admiralty on 20 July 2023 when there were island-wide thundery showers.

8     Most parts of Singapore recorded above average rainfall in July 2023. Kent Ridge recorded rainfall of 149 per cent above average, and Sembawang recorded rainfall of 37 per cent below average.








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)