New record for highest 1-day total rainfall in June 2016
Advisory
Singapore, 1 July 2016 – The prevailing Southwest Monsoon conditions will continue in the first fortnight of July 2016, and the low level winds are expected to blow mainly from the southeast or southwest.
2 In the first half of July 2016, most of the thundery showers due to strong solar heating of land areas are forecast to occur in the late morning and early afternoon on 4 to 6 days. In addition, on one or two mornings, the passage of a Sumatra squall is expected to bring thundery showers with gusty winds to most parts of the island. The rainfall for the first fortnight of July 2016 is likely to be normal.
3 In the first fortnight of July 2016, some days of dry and warm weather conditions can be expected. On these days, the daily maximum temperature could reach a high of 35°C. For other days, the daily maximum temperature is forecast to range between 32°C and 34°C.
REVIEW (1 – 30 June 2016)
4 In June 2016, the region experienced Southwest Monsoon conditions with low level winds blowing predominantly from the south-southeast or southwest.
5 Singapore experienced a few warm days with low rainfall in the last week of June 2016. On 29 June 2016, the daily maximum temperature reached 35.70C, the highest temperature recorded for June 2016. Daily minimum temperatures of between 22.2°C and 22.5°C were recorded on a few days when there was widespread rain. At the Changi climate station, the mean monthly temperature recorded for June 2016 was 28.5°C, which is slightly warmer than the long-term mean of 28.3°C for June but cooler than the mean temperature of 29.0°C for June recorded in the last three years.
6 In the first three weeks of June 2016, most of the thundery showers which were due to strong solar heating of land areas coupled with the convergence of winds over Singapore occurred in the late morning and afternoon. On a few days during this period, the passage of Sumatra squalls brought moderate to heavy thundery showers to many parts of Singapore in the pre-dawn hours and morning. On 17 June 2016, the heavy thundery showers that fell over Tuas recorded a daily total rainfall of 217mm, the highest ever recorded for the month of June. The previous highest daily total rainfall record for June was 144.6mm on 4 June 2011 at Pasir Ris.
7 Most parts of Singapore received above average rainfall in June 2016. The highest rainfall of 374.2mm (126% above average) was recorded around Jurong. Rainfall was lowest around Admiralty where 116mm (19% below 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 monthlymean daily minimum temperature | 23.8 °C (1981) |
| Highest monthly rainfall | 305.4 mm (1988) |
| Lowest monthly rainfall | 18.6 mm (1997) |