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Singapore, 31 January 2022 – With the monsoon rain band forecast to lie closer to the equatorial Southeast Asia region, more thundery showers can be expected in the first fortnight of February 2022, compared to the second fortnight of January 2022. The prevailing Northeast Monsoon conditions are expected to persist in the first half of February 2022, with low-level winds blowing from the northwest or northeast.

2     On the first few days of the forecast period, a mass of dry air over the equatorial Southeast Asia region may bring stable atmospheric conditions and generally fair and warm weather over most parts of Singapore. Thereafter, the monsoon rain band is forecast to migrate closer to the Equator. Thundery showers may be expected over parts of the island in the afternoon on most days with the showers extending into the evening on a few of these days. On a few days during the fortnight, widespread moderate to heavy thundery showers induced by large-scale convergence of winds over Singapore and the surrounding region may also be expected. Overall, the rainfall for the first half of February 2022 is forecast to be above-average over most parts of the island.

3      While more showers are expected in the first fortnight of February, the daily maximum temperature could still reach a high of around 34^oC on a few days. On most days, the daily temperature is forecast to range between 24^oC and 33^oC.

4      For updates of the daily weather forecast, please visit our MSS website (https://www.weather.gov.sg), NEA website (www.nea.gov.sg), or download the myENV app.

REVIEW (1 – 30 January 2022)

5      Northeast Monsoon conditions prevailed over Singapore and the surrounding region in January 2022. The prevailing low-level winds blew from the north or northeast.

6       A high-pressure system over northern continental Asia brought a surge of moderate to strong northeast monsoon winds (monsoon surge ) over the equatorial South China Sea region in the first few days of 2022. The surge brought cool and wet weather over Singapore between 31 December 2021 and 2 January 2022. On 2 January 2022, widespread and continuous moderate rain fell over the island between the pre-dawn hours and afternoon. A total of 101.2mm of rainfall was recorded at Lower Peirce Reservoir on that day. This is the highest daily total rainfall for January 2022. After a wet start to the new year of 2022, it was dry and warm on most days with a few days of short-duration showers. There were also occasionally windy conditions on several days.

7       The daily temperature in January 2022 ranged from 22.5^oC to 35.4^oC. The highest daily maximum temperature of 35.4^oC was recorded on 29 January 2022 at Newton. The minimum temperature of 22.5^oC, recorded at Pasir Panjang on 20 January, was the lowest temperature recorded in January 2022.

8       Most parts of the island recorded below-average rainfall in January 2022. The highest anomaly of 57% below-average was recorded at Simei. The rainfall recorded at Ang Mo Kio was 12% above-average.

CLIMATE STATION STATISTICS

Long-term Statistics for February
(Climatological reference period: 1991 – 2020)

Historical Extremes for February
(Rainfall since 1869 and temperature since 1929)

Singapore, 17 January 2022 – The prevailing Northeast Monsoon season is expected to continue through January 2022, with the low-level winds blowing from the north or northeast. Generally dry conditions are expected for the second fortnight of January, although short-duration thundery showers can be expected over parts of the island on one or two days.

2      During the fortnight, the monsoon rain band is forecast to be located to the south of the equatorial Southeast Asia region. The presence of a dry air mass in the surrounding vicinity of Singapore will bring relatively fair weather on most days, except for occasional passing showers in the afternoon. Windy conditions can be expected in the first week of the fortnight. On one or two days, there may be short-duration thundery showers over parts of the island in the afternoon and evening due to convergence of prevailing winds with the sea breeze. Overall, the rainfall for January 2022 is expected to be below-average over most parts of the island.

3      In the second half of January 2022, the daily temperature is forecast to range between 24^oC and 33^oC on most days. On days with lighter winds, the daily maximum temperature may be higher, and reach around 34^oC.

4      For updates of the daily weather forecast, please visit our MSS website (https://www.weather.gov.sg), NEA website (www.nea.gov.sg), or download the myENV app.

REVIEW (1 – 16 January 2022)

5      Northeast Monsoon conditions prevailed over Singapore and the surrounding region in the first half of January 2022. The low-level winds blew from the north or northeast.

6      Between 31 December 2021 and 2 January 2022, a surge of moderate to strong northeast winds over the South China Sea brought cool and wet weather over Singapore. On 2 January 2022, widespread and continuous moderate rain fell over the island between the pre-dawn hours and afternoon. A total of 101.2mm of rainfall was recorded at Lower Peirce Reservoir. The minimum temperature of 22.8^oC, recorded at Clementi that day, was the lowest minimum temperature recorded in the first fortnight of January 2022.

7       After a wet start to the new year of 2022, the second week of January 2022 was generally fair, with brief periods of afternoon passing showers. There were also occasionally windy conditions on several days. The highest maximum temperature of 34.5^oC was recorded at Sentosa on 13 January 2022.

8       The rainfall in the first half of January 2022 was below-average over most parts of the island, except for northern and central Singapore, where rainfall was above-average. The highest anomaly of 82% above average was recorded at Ang Mo Kio. The anomaly of 34% below average was recorded at Chai Chee.

CLIMATE STATION STATISTICS

Long-term Statistics for January
(Climatological reference period: 1991 – 2020)

Historical Extremes for January
(Rainfall since 1869 and temperature since 1929)

Singapore, 31 December 2021 – The prevailing Northeast Monsoon conditions in the region are forecast to persist into January 2022, with low-level winds blowing from the northwest or northeast. At the start of the new year, a high-pressure system over the northern Asian continent is expected to strengthen and bring wetter and cooler conditions to the region.

2    The strengthening of the high-pressure system is expected to bring a surge of strong north-easterly winds (or monsoon surge ) over the South China Sea. The surge will last for a few days and will likely bring cooler conditions with occasional spells of moderate to heavy thundery showers over Singapore and the surrounding vicinity. Thereafter, localised thundery showers are forecast in the afternoon. The rainy weather is likely to ease in the second week of the fortnight. Localised short-duration thundery showers can still be expected in the afternoon on several days, and warm and occasionally windy conditions with passing showers on a few days. Overall, the rainfall for the first half of January 2022 is expected to be slightly above average over most parts of the island.

3    The rainy weather in early January 2022 is likely to result in lower daily temperatures of between 23 °C and 31 °C on a few days. For the rest of the fortnight, the daily temperatures are forecast to range between 24°C and 33°C. The daily maximum temperature may still reach a high of up to 34oC on a few days.

4      For updates of the daily weather forecast, please visit our MSS website (https://www.weather.gov.sg), NEA website (www.nea.gov.sg), or download the myENV app.

REVIEW (1 – 30 December 2021)

5    In December 2021, Northeast Monsoon conditions prevailed over Singapore and the surrounding region. During this period, the low-level winds blew from the northwest or northeast.

6    While December is climatologically a wetter month than November, December 2021 was drier compared to November 2021. The Northeast Monsoon brought relatively windy conditions with passing showers to Singapore and the surrounding region on most days in the first half of the month. Short-duration thundery showers fell over parts of the island in the afternoon on most days in the second half of December 2021. On a few days, large-scale convergence of winds over Singapore and the surrounding vicinity brought widespread moderate to heavy thundery showers. On the night of 18 December 2021, intense thundery showers fell over many parts of the island. The daily total rainfall recorded that day was 82.6 mm around the Pulau Ubin area. This was the highest total rainfall in a day for December 2021.

7    The daily temperature in December 2021 ranged between 22.1oC and 34.8oC. The highest daily maximum temperature of 34.8 °C was recorded on 1 December at Tengah. On 2 December 2021, the passage of a Sumatra squall brought rainy weather and cloudy skies to Singapore, and the minimum temperature at Jurong dropped to a low of 22.1°C.

8    At the Changi climate station, the daily maximum temperature of 33.9°C recorded on 1 December 2021 was the highest daily maximum temperature ever recorded at our climate station in December. The mean monthly temperature of 27.7°C (as of 30 Dec 2021) was 0.9°C warmer than the long-term December mean temperature.

9 Singapore received below-average rainfall in December 2021. The highest anomaly of 71% below average was recorded at Seletar. The lowest anomaly of 7% below average was at Jurong Pier.

CLIMATE STATION STATISTICS

Long-term Statistics for January
(Climatological reference period: 1991 – 2020)

Historical Extremes for January
(Rainfall since 1869 and temperature since 1929)

Singapore, 16 December 2021 – The Northeast Monsoon conditions which prevailed since the start of December 2021 are expected to continue in the second half of the month, with winds blowing mainly from the northwest or northeast. 

2    The month of December is usually associated with wet weather and occasional windy conditions. However, the Northeast Monsoon conditions in the coming fortnight are forecast to be generally weak with fewer windy days as compared to the first half of the month. While the rest of December 2021 will likely be less rainy than usual, short-duration afternoon thundery showers can still be expected on most days. On some of these days, the showers may extend into the evening. In the first few days of the fortnight, the passage of Sumatra squalls may bring widespread rain, with occasional gusty winds, between the pre-dawn hours and morning. Overall, the rainfall for December 2021 is expected to be well below-average across the island.

3    For the next two weeks, the daily temperature is expected to range between 24°C and 33°C on most days, with highs of 34°C on a few days. The temperature may drop to 22 – 23 °C on a few rainy days.

4    For updates of the daily weather forecast, please visit our MSS website (https://www.weather.gov.sg), NEA website (www.nea.gov.sg), or download the myENV app.

REVIEW (1 –  15 December 2021)

5    In the first half of December 2021, moderate to strong Northeast Monsoon conditions prevailed over Singapore and the surrounding region, and the low-level winds blew mainly from the northwest or northeast.

6    For the first fortnight of December 2021, the Northeast Monsoon brought relatively windy conditions with passing showers to Singapore and the surrounding region on most days, particularly in the second week of December 2021. The strongest wind gust of 68.3 km/hr was recorded at Admiralty on 13 December 2021. On 10 and 11 December 2021, the convergence of low-level winds in the surrounding region of Singapore triggered several spells of widespread rain across the island in the afternoon and evening. The highest daily total rainfall of 78.8mm was recorded at West Coast on 10 December 2021.

7    On 1 December 2021, a daily maximum temperature of 34.8°C was recorded at Tengah. This was the highest daily maximum temperature in the first half of December 2021. On the same day, the temperature at the Changi climate station reached a record high of 33.9 °C, surpassing the previous climate station record of 33.8 °C for the month of December. On 2 December 2021, the passage of a Sumatra squall brought rainy weather and cloudy skies to Singapore, and the minimum temperature at Jurong West dropped to a low of 22.1°C.

8    In the first half of December 2021, rainfall was well below-average across the whole island. The rainfall anomaly at MacRitchie Reservoir was 81% below average.

CLIMATE STATION STATISTICS

Long-term Statistics for December
(Climatological reference period: 1991 – 2020)

Historical Extremes for December
(Rainfall since 1869 and temperature since 1929)

Singapore, 1 October 2021 –The weather for the first half of October 2021 is expected to be warm and less wet compared to September 2021. The daily maximum temperature is forecast to range between 33°C and 34°C on most days, with highs of around 35°C on a few days. Warm and humid conditions can be expected on a few nights with night-time temperatures of around 28°C.

2      During the next fortnight, the prevailing Southwest Monsoon conditions with low-level winds blowing from the southeast or southwest are forecast to persist. Around the end of the fortnight, the low-level winds are expected to weaken and become light and variable in direction, signalling the start of the inter-monsoon period around mid-October 2021.

3      On a few days in the early part of the fortnight, Singapore and the surrounding region can expect dry and warm conditions due to a mass of dry air moving eastward from the Indian Ocean over the equatorial Southeast Asia region. During the fortnight, short-duration thundery showers are expected on a few days over parts of the island between the late morning and afternoon due to strong day-time heating of land areas. In the latter half of the fortnight, a low-pressure system is forecast to develop over the South China Sea. This could result in large scale convergence of winds over Singapore and the surrounding vicinity and trigger the development of Sumatra squalls over the Strait of Malacca. The squalls can bring widespread thundery showers and gusty winds over Singapore on some days between the early and pre-dawn hours, as they move east toward the South China Sea. The rainfall for first half of October 2021 is forecast to be below average over parts of the island.

4      In the first half of October 2021, it is expected to be warm on most days and the daily temperature is expected to range between 24°C and 34°C. On a few days, particularly when it is dry and warm, the daily maximum temperature could reach a high of around 35°C. The weather on some nights can be warm when prevailing winds blow from the southeast or south, bringing warm and humid air from the sea over the land. Night-time temperatures of around 28°C can be expected on these nights.

5      For updates of the daily weather forecast, please visit our MSS website (https://www.weather.gov.sg), NEA website (www.nea.gov.sg), or download the myENV app.

REVIEW (1 – 30 September 2021)

6      Southwest Monsoon conditions prevailed over Singapore and the surrounding region in September 2021. The low-level winds blew from the southeast or southwest on most days and were light and variable in direction on a few days.

7      On most days in September 2021, thundery showers fell over parts of Singapore in the late morning and afternoon due to strong daytime heating of land areas and/or convergence of winds over Singapore and the surrounding vicinity. On some of these days, the showers extended into the evening. The passage of Sumatra squalls from the Strait of Malacca toward the South China Sea brought thundery showers over Singapore between the early hours and morning on some days. On 2 September 2021, large-scale convergence of prevailing winds over Singapore and the surrounding region led to the development of a Sumatra squall over the Strait of Malacca. The squall brought island-wide moderate to heavy thundery showers and gusty winds in the early and predawn hours. The highest daily total rainfall of 123.6mm recorded at Ang Mo Kio that day was the highest daily total rainfall for September 2021.

8      In September 2021, there were 10 days where the daily maximum temperature was 34.0°C or higher. The highest daily maximum temperature of 34.8°C was recorded at Sentosa on 17 September 2021. The lowest daily minimum temperature of 22.0°C was recorded at Tengah on 7 September 2021.

9      Rainfall was above average over all parts of the island in September 2021. The highest anomaly of 91% above average was recorded at Mandai. The anomaly was lowest at Tanjong Katong at 19% above average.

CLIMATE STATION STATISTICS

Long-term Statistics for October
(Climatological reference period: 1991 – 2020)

Historical Extremes for October
(Rainfall since 1869 and temperature since 1929)

Singapore, 16 September 2021 – The weather for the rest of September 2021 is forecast to be similar as that in the first fortnight of the month, with thundery showers expected on most days. For the coming fortnight, the daily maximum temperature is forecast to range between 32°C and 33°C on most days, and with daily highs of around 34°C on a few days.

2      The prevailing Southwest Monsoon conditions in the region are forecast to persist for the rest of September 2021. During the period, the low-level winds are expected to blow mostly from the southeast or southwest, and occasionally shift to blow from the south in the later part of the month.

3      On most days in the coming fortnight, short-duration thundery showers are forecast over parts of the island between the late morning and afternoon. In addition, with a low-pressure system forecast to develop over the northern South China Sea, this could trigger the development of Sumatra squalls over the Strait of Malacca and bring widespread thundery showers and gusty winds to Singapore between the predawn and morning on some days. The overall rainfall for September 2021 is forecast to be above average over most parts of the island.

4      During the second fortnight of September 2021, the daily temperature is forecast to range between 24°C and 33°C on most days. There could still be a few warm days with the daily maximum temperature reaching around 34°C. The weather during the night can be warm and humid with minimum night-time temperatures of around 28°C particularly over the south-eastern parts of the island. This occurs when the prevailing southeast winds bring warm and humid air from the sea over the land.

5      For updates of the daily weather forecast, please visit our MSS website (https://www.weather.gov.sg), NEA website (www.nea.gov.sg), or download the myENV app.

REVIEW (1 – 15 September 2021)

6      In the first fortnight of September 2021, Southwest Monsoon conditions prevailed over the region. During this period, the low-level winds blew from the southeast or southwest.

7      In the first two weeks of September 2021, thundery showers fell over parts of the island in the afternoon on most days due to strong day-time heating of land areas. On a few days, the eastward passage of Sumatra squalls from the Strait of Malacca toward the South China Sea brought thundery showers over Singapore in the predawn and early morning. On 2 September 2021, large-scale convergence of winds in the surrounding vicinity led to the development of a Sumatra squall over the Strait of Malacca. The passage of the squall brought widespread moderate to heavy thundery showers and gusty winds over Singapore in the early and predawn hours. The highest daily total rainfall recorded that day was 123.6mm at Ang Mo Kio. This was the highest daily total rainfall for the first half of September 2021. At the Changi climate station, the total rainfall recorded in the first two weeks of September 2021 (up to 15 September 2021) was 119.2mm, which is close to the average monthly rainfall of 124.9mm for September.

8      The rainy weather and cloudy skies in the first fortnight of September 2021 brought relatively cool conditions on most days. There were four days in the fortnight where the daily maximum temperature was above 34.0°C. The highest daily maximum temperature of 34.5°C was recorded at Marina Barrage on 5 September 2021 and the lowest daily minimum temperature of 22.0°C was recorded at Tengah on 7 September 2021.

9      Rainfall was above average over all parts of the island in the first half of September 2021. The highest anomaly of 108% above average was recorded at Jurong Pier. The anomaly was lowest at Sembawang at 17% above average.

CLIMATE STATION STATISTICS

Long-term Statistics for September
(Climatological reference period: 1991 – 2020)

Historical Extremes for September
(Rainfall since 1869 and temperature since 1929)