Brief Respite to the Dry and Warm Weather in First Half of August 2017

A few warm days can still be expected

Singapore, 1 August 2017 – The prevailing Southwest Monsoon conditions are expected to persist in the first fortnight of August 2017.  During this period, the low level winds are forecast to blow from the southeast or southwest.

2          Compared to the dry weather conditions experienced in the past fortnight, higher rainfall can be expected in the first fortnight of August 2017. Short-duration thundery showers are expected on six to eight days between the late morning and early afternoon, and widespread thundery showers accompanied with gusty winds due to Sumatra squalls on one or two days between the predawn and early morning. The rainfall for the first half of August 2017 is forecast to be normal.

3          Although showers are expected on most days in the coming fortnight, a few warm days with daily maximum temperatures reaching as high as 34°C can still be expected. On most days, the daily maximum and minimum temperatures are forecast to be 32°C- 33°C and 23°C-25°C respectively.

4          For updates of the daily weather forecast, please visit our MSS website (, NEA website (, or download the myENV app, or the MSS’ Weather@SG app.

Review: 1 – 31 July 2017

5          In July 2017, Southwest Monsoon conditions prevailed over the region with low level winds blowing mainly from the southeast or south.

6          The first half of the month was wet with moderate to heavy rain over many parts of the island on most days. Most of the thundery showers fell between the late morning and early afternoon. On a few days, the thundery showers were due to the passage of a Sumatra squall that moved over Singapore in the predawn and early morning. The thundery showers were heaviest on 14 July 2017 where the highest daily rainfall recorded was 110.6mm around the Bukit Timah area. In contrast, the second half of July 2017 was generally dry and warm except for some localised showers on a few days.

7          There were several cool nights in the first half of July 2017 due to the moderate to heavy showers experienced during the day. The daily minimum temperature recorded on 10 days in the first half of July 2017 ranged between 22.3°C and 24°C. In comparison, the daily minimum temperatures in the second half of July 2017 ranged between 24.4°C and 26.1°C, and the daily maximum temperatures were between 32.2°C and 34.5°C. At the Changi climate station, the mean monthly temperature recorded for July 2017 was 28.3°C, which is 0.4°C higher than the long-term mean of 27.9°C for July.

8          Most parts of Singapore received below normal rainfall in July 2017. The lowest rainfall of 79.6mm (48% below average) was recorded around the Changi area. Rainfall was highest around the Thomson area where 204.6mm (2% above average) was recorded.



CLIMATE STATION STATISTICS FOR AUGUST (Climatological reference period: 1981 – 2010)

Mean daily maximum temperature 31.4 °C
Mean daily minimum temperature 25.0 °C
Mean monthly temperature 27.9 °C
Mean rainfall for the month 148.9 mm
Mean number of rain days 14
Highest monthly mean daily maximum temperature 32.6 °C (1997)
Lowest monthly mean daily minimum temperature 23.9 °C (1989)
Highest monthly rainfall 327.3 mm (2008)
Lowest monthly rainfall 45.1 mm (1994)