Wet Weather Conditions to Persist in First Half of July 2017

A few warm days can still be expected

Singapore, 30 June 2017 – In the first fortnight of July 2017, the weather in Singapore and the surrounding region will continue to be influenced by the prevailing Southwest Monsoon season. During this period, the low level winds are forecast to blow mostly from the southeast or southwest.

2          The wet weather conditions experience in the second half of June 2017 are forecast to persist into the first half of July 2017. Thundery showers due to strong solar heating of land areas are expected mostly in the late morning and early afternoon on five to seven days. In addition, widespread thundery showers with occasional gusty winds due to the passage of a Sumatra squall are expected on two or three mornings during the period. The rainfall for the first half of July 2017 is likely to be normal.

3          On most days in the first two weeks of the month, the daily temperature is expected to range between 25°C and 33°C. In the second half of the fortnight, a few warm days can be expected where the daily maximum temperature could reach a high of around 34°C. The daily minimum temperatures could dip to around 22°C on a few rainy days.

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

Review: 1 – 29 June 2017

5          In June 2017, Southwest Monsoon conditions prevailed over Singapore and the region, and the low level winds were predominantly from the southeast or southwest.

6          There were more showers in the second half of June 2017 compared to the first half of the month. On most days in the month, moderate to heavy thundery showers due to strong solar heating of land areas affected the island in the late morning and afternoon, and extended into the evening on a few days. The passage of Sumatra squalls on a few days, brought widespread thundery showers with gusty winds to Singapore in the morning. The rain was heaviest on 18 June 2017 around the Mandai area where the highest daily rainfall total recorded was 137mm.

7          Singapore experienced dry and warm weather conditions with below average rainfall in the first half of June 2017. During the month, the lowest daily minimum temperature recorded was 21.8°C on 23 June 2017 where the rain was widespread over Singapore. At the Changi climate station, the mean monthly temperature recorded for June 2017 was 28.5°C, which is slightly warmer than the long-term mean of 28.3°C for June.

8          About half of Singapore received below normal rainfall in June 2017. The lowest rainfall of 81.6mm (36% below average) was recorded around the Tanjong Katong area. Rainfall was highest around the Jurong area where 255mm (59% above average) was recorded.




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

Mean daily maximum temperature 31.3 °C
Mean daily minimum temperature 25.0 °C
Mean monthly temperature 27.9 °C
Mean rainfall for the month 154.4 mm
Mean number of rain days 14
Highest monthly mean daily maximum temperature 32.4 °C (1997)
Lowest monthly mean daily minimum temperature 23.8 °C (1981)
Highest monthly rainfall 305.4 mm (1988)
Lowest monthly rainfall 18.6 mm (1997)