Category Archives: News

November 16, 2023

More Thundery Showers Expected for the Rest of November 2023

Singapore, 16 November 2023 – Inter-monsoon conditions are prevailing over the region, with the low-level winds generally light and variable in direction.

2 In the coming fortnight, the monsoon rain band is forecast to lie close to the equatorial region, bringing more thundery showers to Singapore. On most days during this period, short-duration thundery showers are expected over parts of the island in the afternoon, extending into the evening on a few days. The thundery showers could be widespread and heavy on some of these days. The total rainfall for the second fortnight of November 2023 is forecast to be above average over most parts of the island.

3 Warm conditions are expected in the coming fortnight. The daily temperature is likely to range between 24 degrees Celsius and 34 degrees Celsius on most days. The daily maximum temperature may reach a high of around 35 degrees Celsius on a few days when there are less clouds in the sky.

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 – 15 November 2023)

5 Singapore and the surrounding region experienced inter-monsoon conditions in the first half of November 2023. The low-level winds that blew predominantly from the southeast or southwest since June 2023 weakened and became mostly light and variable in direction.

6 Thundery showers occurred over parts of Singapore mainly in the afternoon on most days in the first half of the month. On 7 November 2023, widespread moderate to heavy thundery showers fell over many parts of the island in the afternoon. The daily total rainfall of 69.7 mm recorded at Woodland that day was the highest rainfall recorded for the first half of November 2023.

7 The first half of November 2023 was generally warm with daily maximum temperatures above 33 degrees Celsius on most days. The highest daily maximum temperature of 35.8 degree Celsius was recorded at Newton on 3 November 2023. This temperature reading ties with the record for highest daily maximum temperature in Singapore in the month of November (last recorded at Admiralty on 18 November 2019) since temperature records started in 1929.

8 Most parts of the island recorded below-average rainfall in the first half of November 2023. Queenstown recorded rainfall of 84 per cent below-average, and Simei recorded rainfall of 38 per cent above-average.

CLIMATE STATION STATISTICS

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

Average daily maximum temperature:	31.2 °C
Average daily minimum temperature:	24.6 °C
Average monthly temperature:	27.2 °C
Average rainfall:	252.3 mm
Average number of rain days:	19

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

Highest monthly mean daily maximum temperature:	32.3°C (2019)
Lowest monthly mean daily minimum temperature:	22.4 °C (1933)

Highest monthly rainfall ever recorded:	521.5 mm (1874)
Lowest monthly rainfall ever recorded:	53.5 mm (1981)

November 1, 2023

Thundery Showers on Most Days with Onset of Inter-Monsoon Conditions

Singapore, 1 November 2023 – The Southwest Monsoon is coming to an end and inter-monsoon conditions are expected to set in during the first week of November 2023. The inter-monsoon period is characterised by light and variable winds, and thunderstorms which may at times be heavy. Lightning activity tends to be higher during the inter-monsoon months than other months of the year.

2 Afternoon thundery showers are expected on most days in the first half of November 2023. The showers may extend into the evening on a few days. November is climatologically one of the wettest months for Singapore. While showers are expected on most days, we expect below average rainfall in the first fortnight of November 2023.

3 The daily maximum temperatures in the first fortnight of November 2023 are forecast to range between 33 degrees Celsius and 35 degrees Celsius on most days.

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

REVIEW (1 – 31 October 2023)

5 Southwest Monsoon conditions prevailed over Singapore and the surrounding region in October 2023, with low-level winds blowing mostly from the southeast or southwest.

6 The second fortnight of October 2023 saw more showers as the rain band shifted closer to the Equatorial region. Short-duration thundery showers fell over parts of the island in the afternoon on most days. The showers extended into the evening on a few of these days. On 23 October 2023, widespread moderate to heavy thundery showers occurred over many parts of the island in the afternoon. The daily total rainfall of 88.4 mm recorded at Jurong West that day was the highest rainfall recorded for October 2023.

7 Following the haze episode which affected Singapore on 7 and 8 October 2023, the haze situation gradually improved with increased showers over Singapore and the surrounding region later in the month.

8 October 2023 was generally warm with daily maximum temperatures above 34 degrees Celsius on 25 days. On 9 October 2023, temperatures exceeded 35 degrees Celsius in several parts of Singapore, with 36.3 degrees Celsius recorded at Admiralty. This is the highest temperature ever recorded in Singapore in the month of October, surpassing the previous record high of 35.7 degrees Celsius recorded on 14 October 2001 and 13 October 2019.

9 Below average rainfall was recorded across the island in October 2023 with the highest anomaly of 72 per cent below-average recorded at Yio Chu Kang.

CLIMATE STATION STATISTICS

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

Average daily maximum temperature:	31.2 °C
Average daily minimum temperature:	24.6 °C
Average monthly temperature:	27.2 °C
Average rainfall:	252.3 mm
Average number of rain days:	19

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

Highest monthly mean daily maximum temperature:	32.3°C (2019)
Lowest monthly mean daily minimum temperature:	22.4 °C (1933)

Highest monthly rainfall ever recorded:	521.5 mm (1874)
Lowest monthly rainfall ever recorded:	53.5 mm (1981)

October 23, 2023

Haze Situation Update (23 October 2023)

Singapore, 23 October 2023 – The haze situation continues to improve with more rainfall in the surrounding region. As at 5pm, the 1-hr PM2.5 concentration readings were 5-22 µg/m³, in Band I (Normal), and the 24-hr PSI was 48-66, in the Good to Moderate range.

Update on Hotspot and Haze Situation

2 There were showers over Singapore and the surrounding region today. 47 hotspots were detected mainly in the southern and central parts of Sumatra, comparable to the hotspot count of 57 yesterday. Moderate smoke haze was observed over the southern parts of Sumatra.

3 The overall hotspot and haze situation is expected to remain subdued due to the expected wet weather over most of the region, and the prevailing winds are forecast to be light and variable in direction in the coming days. The likelihood of transboundary haze affecting Singapore is assessed to remain low. For the next 24 hours, the 24-hr PSI for Singapore is forecast to be in the Moderate range.

Activity Guidelines

4 The health impact of haze is dependent on one’s health status, the PSI level, and the length and intensity of outdoor activity. For immediate outdoor activities, please check the 1-hr PM2.5 concentration readings and personal guide. Use the 24-hr PSI forecast and corresponding health advisories for planning next day outdoor activities.

5 For updates, visit our haze microsite (www.haze.gov.sg), the NEA website (www.nea.gov.sg), MSS website (https://www.weather.gov.sg), mobile app (myEnv) or follow us on NEA Facebook (www.facebook.com/NEASingapore) and NEA Twitter (@NEAsg). For information on the distribution of hotspots detected over the past fortnight in the region, please refer to the ASEAN Specialised Meteorological Centre (ASMC) website at https://asmc.asean.org.

Areas with lighter smoke haze are not indicated as they cannot be clearly discerned from satellite imagery.

– End –

October 22, 2023

Haze Situation Update (22 October 2023)

Singapore, 22 October 2023 – As at 6pm, the 1-hr PM_2.5 concentration readings were 6-19 µg/m³, in Band I (Normal), and the 24-hr PSI was 38-68, in the Good to Moderate range.

Update on Hotspot and Haze Situation

2 Showers were observed over many parts of Singapore and the surrounding region today. 57 hotspots were detected mainly in southern Sumatra, higher than the 7 hotspots detected yesterday. Some slight localised smoke plumes were observed to emanate from a few hotspots in southern Sumatra.

3 For the next few days, showers are expected over most of the region, which should keep the overall hotspot and haze situation subdued. With the prevailing winds forecast to be generally light and variable in direction, the likelihood of transboundary haze affecting Singapore is assessed to be low. For the next 24 hours, the 24-hr PSI for Singapore is forecast to be in the Moderate range.

Activity Guidelines

Areas with lighter smoke haze are not indicated as they cannot be clearly discerned from satellite imagery.

– End –

October 21, 2023

Haze Situation Update (21 October 2023)

Singapore, 21 October 2023 – As at 6pm, the 1-hr PM_2.5 concentration readings were 5-12 µg/m³, in Band I (Normal), and the 24-hr PSI was 34-56, in the Good to Moderate range.

Update on Hotspot and Haze Situation

2 There were some showers over parts of Singapore and the surrounding region today. Hotspot activity in the region was generally subdued, with seven hotspots detected in southern Sumatra, comparable to the three hotspots detected yesterday. No significant smoke haze was observed due to rain and cloud cover.

3 In the coming days, showers are expected over Singapore and the surrounding region. The prevailing winds are forecast to be light and variable in direction. The regional hotspot and haze situation is expected to remain subdued and the likelihood of transboundary haze affecting Singapore is assessed to be low. For the next 24 hours, the 24-hr PSI for Singapore is forecast to be in the Moderate range.

Activity Guidelines

Areas with lighter smoke haze are not indicated as they cannot be clearly discerned from satellite imagery.

– End –

October 20, 2023

Haze Situation Update (20 October 2023)

Singapore, 20 October 2023 – As at 5pm, the 1-hr PM_2.5 concentration readings were 7-16 µg/m³, in Band I (Normal), and the 24-hr PSI was 41-59, in the Good to Moderate range.

Update on Hotspot and Haze Situation

2 Showers were observed over much of Singapore and the surrounding region today. 3 hotspots were detected in southern Sumatra, comparable to the 4 hotspots detected yesterday. No significant smoke haze was observed over the region as there was extensive rain and cloud cover.

3 The regional hotspot and haze situation is expected to remain subdued under continued wet weather conditions in the coming days. Moreover, with prevailing winds forecast to be generally light and variable in direction, the likelihood of transboundary haze affecting Singapore is assessed to be low. For the next 24 hours, the 24-hr PSI for Singapore is forecast to be in the Moderate range.

Activity Guidelines

Areas with lighter smoke haze are not indicated as they cannot be clearly discerned from satellite imagery.

– End –

October 19, 2023

Haze Situation Update (19 October 2023)

Singapore, 19 October 2023 – As at 6pm, the 1-hr PM_2.5 concentration readings were 7-20 µg/m³, in Band I (Normal), and the 24-hr PSI was 37-62, in the Good to Moderate range.

Update on Hotspot and Haze Situation

2 There was rain over most parts of Singapore and the surrounding region today, bringing an improvement to the regional hotspot and haze situation. 4 hotspots were detected in southern and central Sumatra, lower than the 100 hotspots detected yesterday. No significant smoke haze was observed over southern and central Sumatra under thick cloud cover.

3 More showers are forecast for Singapore and the surrounding region over the next few days. The prevailing winds are forecast to be generally light and variable in direction. The return of wet weather is expected to keep the regional hotspot and haze situation subdued. The likelihood of transboundary haze affecting Singapore is assessed to be low. For the next 24 hours, the 24-hr PSI for Singapore is forecast to be in the Moderate range.

Activity Guidelines

Areas with lighter smoke haze are not indicated as they cannot be clearly discerned from satellite imagery.

– End –

October 18, 2023

Haze Situation Update (18 October 2023)

Singapore, 18 October 2023 – There were thundery showers over many areas in Singapore in the late morning and afternoon today. As at 5pm, the 1-hr PM_2.5 concentration readings were 5-12 µg/m³, in Band I (Normal), and the 24-hr PSI was 52-64, in the Moderate range.

Update on Hotspot and Haze Situation

2 Wetter conditions were observed over many parts of the surrounding region today. 100 hotspots were detected in southern and central Sumatra, lower than the 530 hotspots detected yesterday. Localised smoke plumes were observed to emanate from isolated hotspots in southern Sumatra.

3 More showers are forecast for Singapore and the surrounding region over the next few days, which should further improve the regional hotspot and haze situation. The prevailing winds are forecast to weaken and become light and variable in direction. The likelihood of transboundary haze affecting Singapore is assessed to be low. For the next 24 hours, the 24-hr PSI for Singapore is forecast to be in the Moderate range.

Activity Guidelines

Areas with lighter smoke haze are not indicated as they cannot be clearly discerned from satellite imagery.

– End –

October 17, 2023

Haze Situation Update (17 October 2023)

Singapore, 17 October 2023 – It was fair and warm over Singapore today. As at 6pm, the 1-hr PM_2.5 concentration readings were 8-22 µg/m³, in Band I (Normal), and the 24-hr PSI was 51-65, in the Moderate range.

Update on Hotspot and Haze Situation

2 The weather remained dry over most parts of the surrounding region today. 530 hotspots were detected in southern and central Sumatra, higher than the 285 hotspots detected yesterday. Smoke haze over southern and central Sumatra was observed to be blown towards the northwest by prevailing winds.

3 An increase in shower activities is forecast for Singapore and the surrounding region from tomorrow. The prevailing winds are forecast to blow mainly from the southeast or south, weakening to become light and variable in direction over the next few days. The likelihood of transboundary haze affecting Singapore is assessed to be low. For the next 24 hours, the 24-hr PSI for Singapore is forecast to be in the Moderate range.

Activity Guidelines

Areas with lighter smoke haze are not indicated as they cannot be clearly discerned from satellite imagery.

– End –

October 16, 2023

Haze Situation Update (16 October 2023)

Singapore, 16 October 2023 – It was partly cloudy over Singapore except for some showers over the western parts of the island this morning. As at 6pm, the 1-hr PM_2.5 concentration readings were 13-31 µg/m³, in Band I (Normal), and the 24-hr PSI was 54-72, in the Moderate range.

Update on Hotspot and Haze Situation

2 Dry conditions persisted over most parts of the surrounding region today. 285 hotspots were detected mostly in the southern and central parts of Sumatra, higher than the 24 hotspots detected yesterday.

3 While some showers are expected over Singapore, continued dry weather is forecast over the surrounding region tomorrow. The prevailing winds are expected to blow from the southeast, and occasionally from the south to southwest, with a chance of slight haze affecting Singapore. For the next 24 hours, the 24-hr PSI for Singapore is forecast to be in the Moderate range. The likelihood of transboundary haze affecting Singapore is expected to reduce towards Wednesday as shower activities are forecast to return to the surrounding region.

Activity Guidelines

Areas with lighter smoke haze are not indicated as they cannot be clearly discerned from satellite imagery.

– End –