Monthly Archives: August 2017

Warm conditions expected on a few days

Singapore, 31 August 2017 – The prevailing Southwest Monsoon season is forecast to extend into September 2017. During this period, the low level winds over Singapore and the surrounding region typically blow from the southeast or southwest, and showers usually occur in the afternoon.

2          In the first half of September 2017, it is expected to be wetter than the last fortnight of August 2017.  Short-duration thundery showers due either to strong solar heating of land areas and/or convergence of winds over Singapore and the surrounding vicinity can be expected between the late morning and afternoon on seven or eight days. On one or two days during the fortnight, widespread thundery showers accompanied with gusty winds (due to the passage of squall lines from the Strait of Malacca over Singapore) are expected between the predawn hours and morning. Rainfall for the first half of September 2017 is expected to be slightly above normal.

3          On most days during the first fortnight of September 2017, the daily temperature is expected to range between 24°C and 33°C. On a few days in the fortnight, warm conditions can be expected where the daily maximum temperature could reach a high of around 34°C. The daily minimum temperature could fall to around 22°C on a few rainy days.

4          For updates of the daily weather forecast, please visit our MSS website (https://www.weather.gov.sg), NEA website (www.nea.gov.sg), or download the myENV app, or the MSS’ Weather@SG app.

Review: 1 – 30 August 2017

5          Southwest Monsoon conditions prevailed over Singapore and the surrounding region in August 2017. The low level winds blew predominantly from the southeast or south during the month.

6         The thundery showers experienced in Singapore in August 2017 fell mostly in the late morning and afternoon, and were due to strong solar heating of land area coupled with the convergence of winds over Singapore and the surrounding vicinity. There were a few days when the thundery showers fell in the predawn hours and early morning due to Sumatra squalls moving across Singapore. The heaviest daily rainfall of 116.8mm was recorded on 6 August 2017 around the Lim Chu Kang area.

7          During the month, there were a few warm days where the daily maximum temperature reached a high of between 34.1°C and 34.4°C.  The lowest daily minimum temperature recorded ranged between 21.7°C and 22.7°C. At the Changi climate station, the mean monthly temperature recorded for August 2017 was 28.1°C, which is slightly warmer than the long-term August average of 27.9°C.

8          Most parts of Singapore received below-normal rainfall in August 2017. The lowest rainfall of 83.8mm (48% below average) was recorded around the Tanjong Katong area. Rainfall was highest around the Choa Chu Kang area where 255.8mm (39% above average) was recorded.

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

A few warm days can still be expected

Singapore, 16 August 2017 – In the second half of August 2017, Singapore and the surrounding region will continue to be influenced by Southwest Monsoon conditions, characterised by low level winds that blow predominantly from the southeast or southwest.

2          The wet weather conditions experienced in the first half of August 2017 are forecast to persist in the second fortnight of August 2017. During the period, short-duration thundery showers due to strong solar heating of land areas are expected on six to eight days, mostly in the late morning and early afternoon. On one or two days within the upcoming two weeks, the occurrence of Sumatra squalls could bring widespread thundery showers accompanied with gusty winds to Singapore between the predawn and early morning. Overall, the rainfall for August 2017 is forecast to be near-normal.

3          The daily temperature for the rest of the month is not expected to deviate significantly from that experienced in the first two weeks of August 2017. On most days, the daily temperature is expected to range between 25°C and 33°C, and on a few days in the later part of the month, warm conditions can be expected with the daily maximum temperature reaching a high of around 34°C.  During the fortnight, the daily minimum temperatures could register a value between 22°C and 23°C, in particular when rain falls over the island for most part of the day.

4          For updates of the daily weather forecast, please visit our MSS website (https://www.weather.gov.sg), NEA website (www.nea.gov.sg), or download the myENV app, or the MSS’ Weather@SG app.

Review: 1 – 15 August 2017

5          In the first fortnight of August 2017, Southwest Monsoon conditions prevailed over Singapore and the surrounding region, with the low level winds blowing predominantly from the southeast or south.

6          Compared to the second half of July 2017 where Singapore experienced several days of dry and warm conditions and with few days of rainfall, the first fortnight of August 2017 experienced wetter weather conditions. The thundery showers in the first half of August 2017 occurred between the late morning and early afternoon on most days and between the predawn and early morning on a few days. The showers were due to convergence of winds either over Singapore or in our immediate surrounding vicinity. The rain was heaviest on 6 August 2017 around the Lim Chu Kang area where the highest daily rainfall recorded was 116.8mm.

7          Although it rained on most days during the first half of the month, there were still a few warm days. The highest daily maximum temperature during the first fortnight ranged between 34.1°C and 34.4°C, and the lowest daily minimum temperature was between 21.7°C and 23.3°C.   At the Changi climate station, the mean monthly temperature recorded in the first half of August 2017 was 28.2°C, which is 0.3°C higher than the long-term mean of 27.9°C for August.

8          About two-third of Singapore received below-normal rainfall in first fortnight of August 2017. The lowest rainfall of 12.4mm (48% below average) was recorded around the Tanjong Katong area. Rainfall was highest around the Choa Chu Kang area where 216.0mm (135% above average) was recorded.

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

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 (https://www.weather.gov.sg), NEA website (www.nea.gov.sg), 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)