Singapore, 16 June 2023 – More warm days are expected for the rest of June 2023 compared to the first half of the month. In the coming fortnight, daily maximum temperatures of about 34 degrees Celsius are expected on most days and could reach a high of around 35 degrees Celsius on a few days. Warm and humid conditions are also expected on some nights, with temperatures hovering around 29 degrees Celsius. With the prevailing Southwest Monsoon expected to persist in the second half of June 2023, the low-level winds over Singapore will mostly blow from the southeast or southwest.
2 The second half of June 2023 is expected to be drier than the first half of the month. The presence of a dry air mass may bring relatively fair and warm weather to Singapore on a few days in the coming fortnight. Localised short-duration thundery showers may still occur in the afternoon over parts of the island on some days when there is convergence of prevailing winds with the sea breeze. Widespread thundery showers with gusty winds, due to Sumatra squalls, are forecast between the pre-dawn hours and morning on one or two days. On the whole, we expect below average rainfall in the second half of June 2023. For the month of June, the total rainfall is expected to be near average over most parts of the island.
3 More warm days are expected in the coming fortnight compared to the first half of the month. During the second half of June 2023, the daily maximum temperature is forecast to be around 34 degrees Celsius on most days. On a few days when there is less cloud cover, the daily maximum temperature could reach a high of around 35 degrees Celsius. Warm and humid conditions can also be expected on some nights when prevailing winds from the southeast or south blow warm and humid air from the sea to Singapore. On these nights, minimum night-time temperatures of up to 29 degrees Celsius can be expected, particularly over the south-eastern parts of the island.
4 For updates of the daily weather forecast, please visit the MSS website (www.weather.gov.sg), NEA website (www.nea.gov.sg), or download the myENV app.
REVIEW (1 – 15 June 2023)
5 In the first half of June 2023, the light and variable winds over Singapore and the surrounding region strengthened to blow from the southeast or southwest, as the Southwest Monsoon season set in over the region.
6 On several days during the first fortnight of June 2023, the presence of low-pressure systems over the surrounding sea areas led to the development of Sumatra squalls. This passage of Sumatra squalls brought thundery showers to Singapore between the pre-dawn hours and morning. On 4 June 2023, widespread thundery showers from a Sumatra squall fell over many parts of Singapore in the late morning and early afternoon. The daily total rainfall of 96.2mm recorded at Toa Payoh that day was the highest daily rainfall for the first half of June 2023.
7 The first half of June 2023 was not as warm compared to May 2023 where maximum temperatures of above 35 degrees Celsius were recorded on some days. In the first two weeks of June 2023, there were three days where the daily maximum temperature was above 34 degrees Celsius. The highest daily maximum temperature of 34.7 degrees Celsius was recorded at Pulau Ubin on 2 June 2023. There were also a few warm nights, particularly over the southern and eastern parts of the island where the minimum night-time temperatures ranged between 28 degrees Celsius and 29 degrees Celsius. The warm nights were due to prevailing winds blowing from the southeast bringing warm, humid air from the sea over the land.
8 In the first fortnight of June 2023, rainfall was above average over most parts of Singapore. Seng Kang recorded rainfall of 114 per cent above average, and Mandai recorded rainfall of 58 per cent below average.
CLIMATE STATION STATISTICS
Long-term Statistics for June
(Climatological reference period: 1991 – 2020)
| Average daily maximum temperature: | 31.9 °C |
| Average daily minimum temperature: | 25.7 °C |
| Average monthly temperature: | 28.5 °C |
| Average rainfall: | 135.3 mm |
| Average number of rain days: | 13 |
Historical Extremes for June
(Rainfall since 1869 and temperature since 1929)
| Highest monthly mean daily maximum temperature: | 33.2 °C (1997) |
| Lowest monthly mean daily minimum temperature: | 23.2 °C (1965) |
| Highest monthly rainfall ever recorded: | 378.7 mm (1954) |
| Lowest monthly rainfall ever recorded: | 21.8 mm (2009) |