Singapore, 15 July 2022 – More thundery showers are expected in the second half of July 2022, compared to the first half of the month. The prevailing Southwest Monsoon conditions are expected to persist over Singapore and the surrounding region, with low-level winds forecast to continue blowing from the southeast or southwest.
2 Generally fair and warm conditions can be expected on the first few days of the second half of July 2022 due to stable atmospheric conditions arising from the presence of dry air over Singapore and the surrounding region. For the rest of July 2022, the monsoon rain band is forecast to lie close to the Equator. This is expected to bring more rainfall over the equatorial Southeast Asia region. On most days in the fortnight, localised short-duration showers, at times with thunder, are expected over a few parts of the island in the late morning and afternoon. On some of these days, the thundery showers could be heavy, due to strong day-time heating of land areas coupled with convergence of winds over Singapore and the surrounding vicinity. In addition, island-wide thundery showers with occasional gusty winds due to Sumatra squalls can be expected in the predawn hours and morning on some days. With above-average rainfall expected for the second fortnight, the overall rainfall for July 2022 will likely be near-average over most parts of Singapore.
3 While more showers are expected in the coming fortnight, there could still be a few warm days with daily highs exceeding 34 degrees Celsius. On most days, the daily temperature is forecast to range between 24 degrees Celsius and 33 degrees Celsius. The wet weather may bring lower daily temperatures of between 23 and 32 degrees Celsius on a few days. On a few nights, it can be relatively warm and humid when southeast winds blow moist air from the sea toward land. Night-time minimum temperatures of up to 28 degrees Celsius can be expected, particularly over the eastern and southern coastal areas of the island.
4 For updates of the daily weather forecast, please visit the MSS website (https://www.weather.gov.sg), NEA website (www.nea.gov.sg), or download the myENV app.
REVIEW (1 – 14 July 2022)
5 In the first fortnight of July 2022, Southwest Monsoon conditions continued to persist in the region with the low-level winds blowing mostly from the southeast or southwest, and from the west on a few days.
6 Compared to the second half of June 2022, Singapore experienced less rain days in the first half of July 2022. There were several days where short-duration thundery showers affected some parts of the island. On the morning of 10 July 2022, a Sumatra squall brought moderate to heavy rainfall to many parts of Singapore. The total rainfall of 40.8mm recorded around Upper Peirce Reservoir area that day was the highest daily total rainfall recorded for the first fortnight of July 2022.
7 During the first half of July 2022, the daily maximum temperature ranged from 31.1 degrees Celsius to 34.8 degrees Celsius. In the past two weeks, there were five days where the daily maximum temperature across the island was above 34 degrees Celsius. The highest daily maximum temperature was 34.8 degrees Celsius recorded on 4 July 2022 at Marina Barrage, while the lowest daily minimum temperature was 22.7 degrees Celsius recorded at Admiralty on 10 July 2022. On several nights in the past two weeks, the daily minimum temperatures recorded over many parts of Singapore were above 27 degrees Celsius. The warm night-time temperatures can be attributed to light winds blowing from the southeast bringing warm and humid air from the sea over the land.
8 Below-average rainfall was received across the island in the first fortnight of July 2022. The highest rainfall anomaly of 92 percent below average was recorded at Tengah. The anomaly was lowest at Changi at 13 percent 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) |
