Singapore, 30 June 2023 – The prevailing Southwest Monsoon conditions are expected to persist over Singapore and the surrounding region in the first half of July 2023, with low-level winds blowing from the southeast or southwest.
2 In the first fortnight of July 2023, wet weather conditions are forecast over Singapore and the surrounding region. Short-duration thundery showers are expected between the late morning and afternoon over parts of the island on most days. On a few days, the passage of Sumatra squalls may bring widespread thundery showers and gusty winds between the pre-dawn and morning. The total rainfall for the first half of July 2023 is likely to be above average over most parts of the island.
3 While showers are expected in the coming fortnight, there could still be a few warm days with daily highs of slightly above 34 degrees Celsius. On most other days, the daily maximum temperature is likely to range between 32 degrees Celsius and 34 degrees Celsius. Several nights may be warm and humid, when the prevailing winds blow from the southeast or south bringing warm and moist air from the sea to Singapore. On these nights, the temperatures may stay above 28 degrees Celsius, particularly over the eastern and southern coastal areas 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 – 29 June 2023)
5 Southwest Monsoon conditions prevailed over Singapore and the surrounding region from early June 2023 with the prevailing winds blowing mostly from the southeast or southwest.
6 In June 2023, localised short-duration thundery showers fell over parts of the island on some afternoons. There were several days when Sumatra squalls brought widespread thundery showers and gusty winds over Singapore in the pre-dawn 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 June 2023.
7 June 2023 was less warm compared to May 2023. The daily maximum temperature ranged between 32 and 34 degrees Celsius on most days. The highest daily maximum temperature of 34.7 degrees Celsius was recorded at Pulau Ubin and Ang Mo Kio on 2 June 2023 and 20 June 2023 respectively. There were also several warm nights where the minimum night-time temperatures remained above 28 degrees Celsius.
8 Most parts of Singapore recorded above average rainfall in June 2023. MacRitchie Reservoir recorded rainfall of 84 per cent above average, and Mandai recorded rainfall of 34 per cent below average.
CLIMATE STATION STATISTICS
Long-term Statistics for July
(Climatological reference period: 1991 – 2020)
| Average daily maximum temperature: | 31.4 °C |
| Average daily minimum temperature: | 25.4 °C |
| Average monthly temperature: | 28.2 °C |
| Average rainfall: | 146.6 mm |
| Average number of rain days: | 14 |
Historical Extremes for July
(Rainfall since 1869 and temperature since 1929)
| Highest monthly mean daily maximum temperature: | 32.4 °C (1997) |
| Lowest monthly mean daily minimum temperature: | 22.9 °C (1975) |
| Highest monthly rainfall ever recorded: | 527.3 mm (1890) |
| Lowest monthly rainfall ever recorded: | 12.2 mm (2019) |