- Fortnightly Outlook
Fortnightly Weather Outlook for 16 – 31 January 2020
WEATHER OUTLOOK (16 – 31 January 2020)
1 For the rest of January 2020, the Meteorological Service Singapore (MSS) forecasts more showers during the prevailing Northeast Monsoon season and low-level winds to continue blowing from the north or northeast.
2 With the migration of the monsoon rain band closer to the equatorial Southeast Asia region, the second fortnight of January 2020 can expect more showers compared to the first fortnight of the month. During this period, convergence of winds coupled with strong daytime heating of land areas is expected to bring thundery showers mostly in the afternoon on eight to ten days. Overall, rainfall in January 2020 is forecast to be below normal over most parts of Singapore.
3 The daily temperature forecast for most days in the second fortnight of 2020 is between 24°C and 33°C. During the fortnight, it can be warm on a few days with daily maximum temperatures of around 34oC. Daily minimum temperatures could reach a low of around 23°C on a few nights.
4 For updates of the daily weather and haze situation, please visit the MSS website (www.weather.gov.sg), NEA website (www.nea.gov.sg), or download the myENV app, MSS’ Weather@SG app, and the haze microsite (www.haze.gov.sg).
REVIEW (1 – 15 January 2020)
5 Northeast Monsoon conditions prevailed over Singapore and the surrounding region in the first half of January 2020. On most days during this period, the low-level winds were blowing from the northeast.
6 Singapore and the surrounding region experienced windy conditions in the first two weeks of 2020. In the first half of the fortnight, strong prevailing northeasterly winds coupled with convergence of winds in the surrounding region brought brief periods of light to moderate showers to Singapore on a few days. In the second half of the fortnight, a weakening of the prevailing winds and strong daytime heating of land areas brought short-duration thundery showers in the afternoon on some days. The highest daily total rainfall recorded in the first fortnight of 2020 was 43.2 mm on 12 January 2020 at Tanjong Katong. The thundery showers that day fell over most parts of the island between the late afternoon and evening.
7 During the fortnight, the daily maximum temperature across the island ranged between 31.6°C and 33.5°C, with the highest temperature of 33.5°C recorded on 12 January 2020 at Paya Lebar. The daily minimum temperature ranged between 22.8°C and 24.7°C. 12 January 2020 also recorded the lowest daily minimum temperature of 22.8°C at Pasir Panjang, which was associated with thundery showers over most parts of the island that day.
8 Singapore received well below normal rainfall in the first fortnight of January 2020. The highest anomaly of 86% below average was recorded at Sentosa. The anomaly was lowest at Tanjong Katong at 35% below average.
CLIMATE STATION STATISTICS
Long-term Statistics for January
(Climatological reference period: 1981 – 2010)
|Average daily maximum temperature||30.4 °C|
|Average daily minimum temperature||23.9 °C|
|Average monthly temperature||26.5 °C|
|Average rainfall||234.6 mm|
|Average number of rain days||13|
Historical Extremes for January
(Rainfall since 1869 and temperature since 1929)
|Highest monthly mean daily maximum temperature:||31.8 °C (1998, 2016)|
|Lowest monthly mean daily minimum temperature:||21.6 °C (1934)|
|Highest monthly rainfall ever recorded:||818.6 mm (1893)|
|Lowest monthly rainfall ever recorded:||15.4 mm (1997)|