Monthly Archives: September 2026

September 11, 2026

Haze Situation Update (11 September 2026)

Singapore, 11 September 2026 – Heavy showers fell over Singapore today. As at 6pm, the 1-hr PM_2.5 concentration readings were 12 – 20 µg/m³, in Band 1 (Normal), and the 24-hr PSI was 69 – 88, in the Moderate range.

Update on Hotspot and Haze Situation

2 Moderate to dense smoke plumes continue to be observed from fires in southern Sumatra and Kalimantan.

3 While showers can be expected over northern and central Sumatra over the next few days, dry conditions are forecast over Kalimantan and southern Sumatra. Under the prevailing southeasterly or southerly winds, there remains a risk of smoke haze affecting Singapore. The 24-hr PSI for Singapore is forecast to be in the Moderate – Low Unhealthy 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 (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 http://asmc.asean.org.

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

– End –

September 10, 2026

Haze Situation Update (10 September 2026)

Singapore, 10 September 2026 – Showers occurred over Singapore today. As at 6pm, the 1-hr PM_2.5 concentration readings were 38 – 70 µg/m³, in Band 1 – 2 (Normal to Elevated), and the 24-hr PSI was 73 – 104, in the Moderate – Unhealthy range.

Update on Hotspot and Haze Situation

2 Moderate to dense smoke plumes continue to be detected from fires in southern Sumatra and Kalimantan. Smoke plumes from southern Sumatra were observed to drift towards Singapore.

3 Some showers are forecast mostly over northern and central Sumatra in the next few days. As dry conditions are expected to continue over Kalimantan and southern Sumatra, there is a risk of smoke haze affecting Singapore should the fires persist, under the prevailing southeasterly or southerly winds. The 24-hr PSI for Singapore is forecast to be in the High Moderate – Low Unhealthy range.

Activity Guidelines

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

– End –

September 9, 2026

Haze Situation Update (9 September 2026)

Singapore, 09 September 2026 – Dry conditions were observed over Singapore today. As at 5pm, the 1-hr PM2.5 concentration readings were 46 – 69 µg/m3, in Band 1 – 2 (Normal to Elevated), and the 24-hr PSI was 74 – 97, in the Moderate range.

Update on Hotspot and Haze Situation

2 Moderate to dense smoke plumes continue to be detected from fires in southern and central Sumatra and Kalimantan. Smoke haze was observed to drift towards Singapore.

3 While some showers are forecast over central and northern Sumatra in the coming days, dry conditions are expected to persist over Kalimantan and southern Sumatra. With prevailing winds blowing from the southeast or south, there remains a risk of smoke haze affecting Singapore should the fires persist. The 24-hr PSI for Singapore is forecast to be in the High Moderate – Low Unhealthy range.

Activity Guidelines

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

– End –

September 8, 2026

Haze Situation Update (8 September 2026)

Singapore, 08 September 2026 – Partly cloudy conditions were observed over Singapore today. As at 6pm, the 1-hr PM_2.5 concentration readings were 32 – 63 µg/m³, in Band 1 – 2 (Normal to Elevated), and the 24-hr PSI was 62 – 74, in the Moderate range.

Update on Hotspot and Haze Situation

2 Moderate to dense smoke plumes continue to be observed from the fires in southern and central Sumatra and Kalimantan. Some smoke haze also drifted towards Singapore from isolated
nearby fires.

3 With dry conditions expected to persist over southern Sumatra and parts of Kalimantan in the coming days, there remains a risk of smoke haze. The 24-hr PSI for Singapore is forecast to be in the Moderate – Low Unhealthy range.

Activity Guidelines

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

– End –

September 7, 2026

Haze Situation Update (7 September 2026)

Singapore, 07 September 2026 – Conditions over Singapore today were fair. As at 5pm, the 1-hr PM_2.5 concentration readings were 22 – 29 µg/m³, in Band 1 (Normal), and the 24-hr PSI was 64 – 86, in the Moderate range.

Update on Hotspot and Haze Situation

2 Moderate to dense smoke plumes from fires in southern and central Sumatra, as well as West Kalimantan, continued to drift toward Singapore.

3 Some showers are expected over parts of Kalimantan in the coming days. However, dry conditions are expected to persist over Singapore and southern and central Sumatra. If the fires continue, there remains a risk of smoke haze affecting Singapore. The 24-hr PSI for Singapore is forecast to be in the Moderate to Low Unhealthy range.

Activity Guidelines

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

– End –

September 6, 2026

Haze Situation Update (6 September 2026)

Singapore, 06 September 2026 – Fair and windy conditions occurred over Singapore today. As at 5pm, the 1-hr PM_2.5 concentration readings were 42-61 µg/m³, in Band I – 2 (Normal – Elevated), and the 24-hr PSI was 72-86, in the Moderate range.

Update on Hotspot and Haze Situation

2 With the ongoing dry conditions, moderate to dense smoke plumes from fires in southern and central Sumatra as West Kalimantan continued to drift towards Singapore.

3 While some showers are forecast over Kalimantan, dry conditions are expected over Singapore and the surrounding region in the coming days. With prevailing winds blowing from the southeast or south, there is a continued risk of smoke haze affecting Singapore should the fires persist. The 24-hr PSI for Singapore is forecast to be in the High Moderate to Low Unhealthy range.

Activity Guidelines

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

– End –

September 5, 2026

Haze Situation Update (5 September 2026)

Singapore,5 September 2026 – The weather over Singapore today was fair and occasionally windy. As at 6pm, the 1-hr PM2.5 concentration readings were 33-56 µg/m3, in Band I (Normal), and the 24-hr PSI was 78-104, in the Moderate – Unhealthy range.

Update on Hotspot and Haze Situation

2 Most parts of the surrounding region remained dry today. Moderate to dense smoke plumes over the southern and central parts of Sumatra and various parts of Kalimantan continued to drift towards Singapore.

3 With dry conditions expected to persist over Singapore and the surrounding region in the coming days, and with prevailing winds blowing from the southeast or south, Singapore may continue to be affected by transboundary haze should the fires remain active. The 24-hr PSI for Singapore is forecast to be in the higher end of the Moderate to the lower end of the Unhealthy range.

Activity Guidelines

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 –

September 4, 2026

Haze Situation Update (4 September 2026)

Singapore, 04 September 2026 – The weather over Singapore today was fair and occasionally windy. As at 5pm, the 1-hr PM_2.5 concentration readings were 53-92 µg/m³, in Band I – 2 (Normal – Elevated), and the 24-hr PSI was 98-112, in the Moderate – Unhealthy range.

Update on Hotspot and Haze Situation

2 The surrounding region was mostly dry today. Smoke plumes from fires in the southern and central parts of Sumatra and various parts of Kalimantan were observed to drift towards Singapore.

3 As dry conditions are forecast for the coming days, Singapore may continue to be affected by the transboundary haze under the prevailing southeasterly or southerly winds if the fires persist. The 24-hr PSI for Singapore is forecast to be in the higher end of the Moderate to the middle of the Unhealthy range.

Activity Guidelines

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

– End –

September 1, 2026

Dry Conditions to Continue into the First Fortnight of September 2026

1 September 2026 – Dry conditions are expected to continue into the first fortnight of September 2026. Southwest Monsoon conditions are prevailing over Singapore and the surrounding region and are forecast to persist in the coming fortnight, with winds blowing mainly from the southeast or southwest.

2 Fair and occasionally windy conditions are expected on most days, particularly during the first week of September 2026. Localised short-duration thundery showers may occur over parts of the island in the late morning and afternoon on a few days. The total rainfall for the first fortnight of September 2026 is forecast to be below average over most parts of the island.

3 Daily maximum temperatures are likely to range between 33 degrees Celsius and 35 degrees Celsius on most days, and could slightly exceed 35 degrees Celsius on a few days. The nights may also be warm and humid, with minimum temperatures remaining above 27 degrees Celsius on most nights.

4 With the prevailing dry conditions, there has been an escalation in the hotspot and smoke haze situation in the surrounding region. Dense smoke haze was observed over southern and central Sumatra and various parts of Kalimantan on most days since around 21 August 2026. While there may be sporadic showers in the second week of the fortnight, the dry conditions are expected to persist over most of the surrounding region during the fortnight. Under the prevailing southeasterly or southwesterly winds, Singapore may experience hazy conditions should the fires intensify. The National Environment Agency (NEA) will continue to closely monitor the situation and provide updates if the situation changes. Should the 24-hour PSI enter the Unhealthy range, NEA will provide daily haze advisories.

5 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 OF THE PAST TWO WEEKS (17 – 31 August 2026)

6 Southwest Monsoon conditions prevailed over Singapore and the surrounding region in the second fortnight of August 2026, with winds blowing mostly from the southeast or southwest.

7 Singapore experienced dry conditions in the second fortnight of August 2026, with fair weather on most days. Localised short-duration thundery showers fell over parts of the island on some days. On 30 August 2026, regional wind convergence brought moderate to heavy thundery showers over the eastern, southern, and central parts of Singapore in the early morning. The highest daily total rainfall for the second fortnight of August 2026 was recorded around Telok Blangah on that day, at 53.8mm.

8 The second fortnight of August 2026 was warm, with daily maximum temperatures exceeding 34 degrees Celsius on most days. The highest daily maximum temperature of 35.5 degrees Celsius was recorded at Seletar on 25 August 2026. There were also several nights when minimum temperatures remained above 27 degrees Celsius.

9 Singapore recorded well below average rainfall in the second fortnight of August 2026. The area around Admiralty registered rainfall of about 99 per cent below average.

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CLIMATE STATION STATISTICS

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

Average daily maximum temperature:	31.6 °C
Average daily minimum temperature:	25.2 °C
Average monthly temperature:	28.0 °C
Average rainfall:	124.9 mm
Average number of rain days:	13

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

Highest monthly mean daily maximum temperature:	33.0 °C (2019)
Lowest monthly mean daily minimum temperature:	22.4 °C (1930)

Highest monthly rainfall ever recorded:	440.4 mm (1988)
Lowest monthly rainfall ever recorded:	22.8 mm (2019)