**Ongoing southwest monsoon conditions, with prevailing southeasterly to southwesterly winds and frequent localized thundery showers, are sustaining elevated overnight humidity and cloud cover that limit nocturnal radiative cooling across Singapore.** This keeps minimum temperatures typically above 27°C, aligning with the Singapore National Environment Agency and Meteorological Service outlook for the second half of September 2026. Recent model consensus and station data show daily lows clustering near 27°C, with brief clearer intervals or heavier rainfall potentially allowing dips toward 25–26°C on any given night. High dew points near 24–25°C further compress the diurnal range, explaining the market’s tight distribution among the 25°C, 26°C, and 27°C outcomes while rendering sub-24°C readings highly improbable under current atmospheric stability. Updated forecasts from official monitoring agencies will refine the exact overnight low as the day progresses.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedLowest temperature in Singapore on September 21?
Lowest temperature in Singapore on September 21?
25°C 98%
26°C 49%
23°C 5%
24°C 5%
NEW
NEW
Sep 21, 2026
21°C or below
1%
22°C
1%
23°C
5%
24°C
5%
25°C
98%
26°C
49%
27°C
53%
28°C
<1%
29°C
<1%
30°C
<1%
31°C or higher
<1%
25°C 98%
26°C 49%
23°C 5%
24°C 5%
NEW
NEW
Sep 21, 2026
21°C or below
$65 Vol.
1%
22°C
$65 Vol.
1%
23°C
$0 Vol.
5%
24°C
$0 Vol.
5%
25°C
$5 Vol.
98%
26°C
$0 Vol.
49%
27°C
$20 Vol.
53%
28°C
$111 Vol.
<1%
29°C
$1,031 Vol.
<1%
30°C
$37 Vol.
<1%
31°C or higher
$37 Vol.
<1%
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Singapore Changi Airport Station in degrees Celsius on 21 Sep '26.
The resolution source for this market will be information from NOAA, specifically the lowest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=wsss
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.**Ongoing southwest monsoon conditions, with prevailing southeasterly to southwesterly winds and frequent localized thundery showers, are sustaining elevated overnight humidity and cloud cover that limit nocturnal radiative cooling across Singapore.** This keeps minimum temperatures typically above 27°C, aligning with the Singapore National Environment Agency and Meteorological Service outlook for the second half of September 2026. Recent model consensus and station data show daily lows clustering near 27°C, with brief clearer intervals or heavier rainfall potentially allowing dips toward 25–26°C on any given night. High dew points near 24–25°C further compress the diurnal range, explaining the market’s tight distribution among the 25°C, 26°C, and 27°C outcomes while rendering sub-24°C readings highly improbable under current atmospheric stability. Updated forecasts from official monitoring agencies will refine the exact overnight low as the day progresses.
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Singapore Changi Airport Station in degrees Celsius on 21 Sep '26.
The resolution source for this market will be information from NOAA, specifically the lowest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=wsss
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
The resolution source for this market will be information from NOAA, specifically the lowest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=wsss
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
Market Opened: Sep 19, 2026, 12:30 AM ET
Volume
$1,371End Date
Sep 21, 2026Market Opened
Sep 19, 2026, 12:30 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=wsssResolver
0x69c47De9D...This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Singapore Changi Airport Station in degrees Celsius on 21 Sep '26.
The resolution source for this market will be information from NOAA, specifically the lowest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=wsss
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.**Ongoing southwest monsoon conditions, with prevailing southeasterly to southwesterly winds and frequent localized thundery showers, are sustaining elevated overnight humidity and cloud cover that limit nocturnal radiative cooling across Singapore.** This keeps minimum temperatures typically above 27°C, aligning with the Singapore National Environment Agency and Meteorological Service outlook for the second half of September 2026. Recent model consensus and station data show daily lows clustering near 27°C, with brief clearer intervals or heavier rainfall potentially allowing dips toward 25–26°C on any given night. High dew points near 24–25°C further compress the diurnal range, explaining the market’s tight distribution among the 25°C, 26°C, and 27°C outcomes while rendering sub-24°C readings highly improbable under current atmospheric stability. Updated forecasts from official monitoring agencies will refine the exact overnight low as the day progresses.
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Singapore Changi Airport Station in degrees Celsius on 21 Sep '26.
The resolution source for this market will be information from NOAA, specifically the lowest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=wsss
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
The resolution source for this market will be information from NOAA, specifically the lowest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=wsss
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
Volume
$1,371End Date
Sep 21, 2026Market Opened
Sep 19, 2026, 12:30 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=wsssResolver
0x69c47De9D...**Ongoing southwest monsoon conditions, with prevailing southeasterly to southwesterly winds and frequent localized thundery showers, are sustaining elevated overnight humidity and cloud cover that limit nocturnal radiative cooling across Singapore.** This keeps minimum temperatures typically above 27°C, aligning with the Singapore National Environment Agency and Meteorological Service outlook for the second half of September 2026. Recent model consensus and station data show daily lows clustering near 27°C, with brief clearer intervals or heavier rainfall potentially allowing dips toward 25–26°C on any given night. High dew points near 24–25°C further compress the diurnal range, explaining the market’s tight distribution among the 25°C, 26°C, and 27°C outcomes while rendering sub-24°C readings highly improbable under current atmospheric stability. Updated forecasts from official monitoring agencies will refine the exact overnight low as the day progresses.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
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