- Fortnightly Outlook
Weather Outlook: 16 – 30 June 2017
1 The prevailing Southwest Monsoon conditions are expected to persist in the second fortnight of June 2017, and the low level winds are forecast to blow predominantly from the southeast or southwest..
2 In the second half of June 2017, six to eight days of short-duration thundery showers mostly in the late morning and afternoon can be expected. In addition, the passage of a Sumatra squall is expected to bring widespread thundery showers with occasional gusty winds to Singapore between the predawn hours and morning on one or two days. Rainfall for June 2017 is likely to be below normal.
3 While more showers are expected in the second fortnight of June 2017 compared to the first fortnight, the daily maximum temperature could still reach a high of around 35°C on a few days. On most days, the daily temperature is forecast to range between 25°C and 34°C.
Review: 1 – 15 June 2017
5 Southwest monsoon conditions prevailed over the region in the first half of June 2017, with the low level winds blowing from the southeast or southwest.
6 During the review period, Singapore experienced dry and warm conditions, particularly in the first week of June 2017. The highest daily maximum temperature was 34.9°C recorded at Choa Chu Kang on 5 June 2017. At the Changi climate station, the night time temperatures on most days ranged between 25.8°C and 28.3°C, well above the long-term climatological June mean minimum temperature of 25.4°C. The warm nights were due to warm and humid air over the sea being blown towards land by the prevailing winds. The mean temperature recorded at the Changi climate station in the first half of June 2017 was 29.1°C, approximately 0.8°C warmer than the long-term mean temperature for June.
7 In the first half of June 2017, short-duration thundery showers occurred over the island mostly in the late morning and early afternoon on a few days due to strong solar heating of land areas. On 14 June 2017, the passage of a Sumatra squall in the morning brought moderate to heavy thundery showers to Singapore. The thundery showers were heaviest on 10 June 2017 where the highest daily rainfall total recorded was 99.6mm around the Tuas area.
8 Most parts of Singapore received below normal rainfall in the first half of June 2017. The lowest rainfall of 8.6mm (87% below average) was recorded around the Changi area. Rainfall was highest around the Choa Chu Kang area where 116.3mm (36% above average) was recorded.
CLIMATE STATION STATISTICS FOR JUNE (Climatological reference period: 1981 – 2010)
|Mean daily maximum temperature||32.0 °C|
|Mean daily minimum temperature||25.4 °C|
|Mean monthly temperature||28.3 °C|
|Mean rainfall for the month||130.7 mm|
|Mean number of rain days||12|
|Highest monthly mean daily maximum temperature||33.2 °C (1997)|
|Lowest monthly mean daily minimum temperature||24.4 °C (1989)|
|Highest monthly rainfall||265.8 mm (1996)|
|Lowest monthly rainfall||21.8 mm (2009)|