Singapore, 17 July 2023 – The prevailing Southwest Monsoon conditions are expected to persist over Singapore and the surrounding region in the coming fortnight, with low-level winds continuing to blow from the southeast or southwest.
2 Drier weather conditions are expected in the second half of July 2023 as compared to the first half of the month. The development of low pressure systems in the western Pacific Ocean and South China Sea may shift the rain band northwards and bring less rainfall to Singapore and the surrounding region. In the coming days, the passage of Sumatra squalls may bring widespread thundery showers and gusty winds on one to two mornings. Short-duration thundery showers are expected between the late morning and afternoon over parts of the island on some days. On the whole, we expect below average rainfall in the second half of July 2023. For the month of July, the total rainfall is expected to be near average over most parts of the island.
3 Warm conditions are expected on most days in the second fortnight of July 2023, with daily maximum temperatures ranging between 32 and 34 degrees Celsius. The daily maximum temperature could reach a high of around 35 degrees Celsius on one or two days. Several nights may also be warm, particularly when the prevailing winds blow from the southeast or south, and bring warm and humid air from the sea. Night-time temperatures of around 28 degrees Celsius can be expected on these nights, 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 – 16 July 2023)
5 Southwest Monsoon conditions prevailed over Singapore and the surrounding region in the first fortnight of July 2023, with low-level winds blowing mostly from the southeast or southwest.
6 In the first fortnight of July 2023, localised short-duration thundery showers fell over parts of the island in the late morning and afternoon on most days. On 14 July 2023, convergence of winds over the surrounding region brought widespread thundery showers to Singapore in the morning and early afternoon. The daily total rainfall of 98.4 mm recorded at Kent Ridge that day was the highest rainfall recorded for the first half of July 2023.
7 The daily maximum temperatures in the first half of July 2023 were 34 degrees Celsius and below on all days except 4 and 5 July 2023. The highest daily maximum temperature of 35.4 degrees Celsius was recorded at Choa Chu Kang and Clementi on 5 July 2023. There were also several 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.
8 Most parts of Singapore recorded above average rainfall in the first half of July 2023. Kent Ridge recorded rainfall of 113 per cent above average, and Sembawang recorded rainfall of 56 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) |