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More warm nights expected with the start of southwest monsoon conditions |

Singapore, June 1, 2023 – Low winds over Singapore and the surrounding region are forecast to strengthen and blow from the southeast or southwest in early June 2023, as the Southwest Monsoon progressively settles over the region. The southwest monsoon season usually runs through September and is generally a drier season compared to other times of the year.

2 In the first half of June 2023, short-duration localized thundershowers can be expected in parts of the island on some afternoons. Additionally, Sumatra’s squalls can bring widespread thunderstorms and gusts of wind between early morning and early morning on some days. Total precipitation for the first half of June 2023 is likely to be close to average for most of the island.

3 The daily maximum temperature in the next fortnight is expected to be between 33 and 34 degrees Celsius on most days. On a day or two when there is less cloudiness, the daily maximum temperature could peak at around 35 degrees Celsius. The nights are also expected to be warm and humid. Warm nights usually occur when the prevailing winds blow from the southeast or south, bringing warm, moist air from the sea. On these nights, temperatures can stay above 29 degrees Celsius, particularly in the southern and eastern coastal areas of the island.

4 For daily weather forecast updates, visit the MSS website (www.weather.gov.sg), the NEA website (www.nea.gov.sg) or download the myENV app.

REVIEW (1 – 31 May 2023)

5 Inter-monsoon conditions prevailed in May 2023 with prevailing winds generally light and variable in direction.

6 Localized short-duration thunderstorms fell over parts of Singapore in the afternoon on several days in May 2023. There were a few days when squalls off Sumatra brought widespread thunderstorms and gusty winds to the island in the morning. On May 4, 2023, strong solar heating of land areas, coupled with localized convergence of winds, caused thunderstorms to develop over most of Singapore in the afternoon. The total daily rainfall of 113.2mm that fell in Paya Lebar that day was the highest rainfall recorded for May 2023.

May 7, 2023 was warm, with maximum temperatures above 34 degrees Celsius on most days. There were nine days in May recording temperatures of 35 degrees Celsius or higher. Most of these days occurred in the first half of the month. It was especially warm in the second week of May 2023 when light winds and clear sky conditions brought high temperatures to many parts of Singapore. Warm overnight temperatures were also experienced during the second half of the month, when temperatures stayed above 29.0 degrees Celsius on some days.

8 On May 13, 2023, several locations recorded temperatures above 36 degrees Celsius, with the highest temperature of 37.0 degrees Celsius measured at Ang Mo Kio. This temperature reading ties with the record for the highest daily maximum temperature in Singapore (last recorded at Tengah on April 17, 1983) since temperature records began in 1929. On May 25, 2023, the temperature The daily minimum recorded at the East Coast Parkway station reached a maximum of 29.7 degrees Celsius, the highest recorded for the month of May. The previous record was 29.5 degrees Celsius recorded at the same station on May 18, 2022. At the Changi weather station, the average temperature for May 2023 was 29.5 degrees Celsius, surpassing the previous record of 29 .4 degrees Celsius established in May 1998.

9 Most parts of Singapore recorded below average rainfall in May 2023. The highest anomaly of nine percent above average was recorded around Paya Lebar. The anomaly was lowest in Punggol at 64 percent below average.

WEATHER STATION STATISTICS

Short-term statistics for June
(Climatological reference period: 1991 – 2020)

Daily average maximum temperature: 31.9ºC
Average daily minimum temperature: 25.7ºC
average monthly temperature: 28.5ºC
Average Rain: 135.3mm
Average rainy days: 13

Historic extremes for June
(Precipitation since 1869 and temperature since 1929)

Highest monthly average daily maximum temperature: 33.2ºC (1997)
Lowest monthly average daily minimum temperature: 23.2ºC (1965)
Highest monthly precipitation ever recorded: 378.7mm (1954)
Lowest monthly precipitation ever recorded: 21.8mm (2009)

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