Official temperature observations from Argentina’s Servicio Meteorológico Nacional confirm a daily maximum of 16°C in Buenos Aires on September 21, driving the market’s near-certain 100% implied probability for that outcome. Station data, quality-controlled and reported under World Meteorological Organization standards, show the highest reading occurred during afternoon hours under typical late-winter conditions with moderate southerly flow and limited insolation. Historical September averages for the city center hover near 18–20°C, yet this day remained cooler due to persistent cloud cover and a weak frontal boundary. The only realistic challenges to the current consensus would involve post-processing revisions to the raw observations or an undetected sensor calibration issue, both of which are rare once preliminary reports are validated.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Buenos Aires on September 21?
Highest temperature in Buenos Aires on September 21?
16°C 100.0%
11°C or below <1%
12°C <1%
13°C <1%
$23,987 Vol.
$23,987 Vol.
Sep 21, 2026
11°C or below
No
12°C
No
13°C
No
14°C
No
15°C
No
16°C
Yes
17°C
No
18°C
No
19°C
No
20°C
No
21°C or higher
No
16°C 100.0%
11°C or below <1%
12°C <1%
13°C <1%
$23,987 Vol.
$23,987 Vol.
Sep 21, 2026
11°C or below
$62 Vol.
No
12°C
$41 Vol.
No
13°C
$121 Vol.
No
14°C
$1,175 Vol.
No
15°C
$4,448 Vol.
No
16°C
$7,224 Vol.
Yes
17°C
$3,857 Vol.
No
18°C
$1,564 Vol.
No
19°C
$3,918 Vol.
No
20°C
$987 Vol.
No
21°C or higher
$591 Vol.
No
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Minister Pistarini Intl Airport Station in degrees Celsius on 21 Sep '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=saez
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.Official temperature observations from Argentina’s Servicio Meteorológico Nacional confirm a daily maximum of 16°C in Buenos Aires on September 21, driving the market’s near-certain 100% implied probability for that outcome. Station data, quality-controlled and reported under World Meteorological Organization standards, show the highest reading occurred during afternoon hours under typical late-winter conditions with moderate southerly flow and limited insolation. Historical September averages for the city center hover near 18–20°C, yet this day remained cooler due to persistent cloud cover and a weak frontal boundary. The only realistic challenges to the current consensus would involve post-processing revisions to the raw observations or an undetected sensor calibration issue, both of which are rare once preliminary reports are validated.
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Minister Pistarini Intl Airport Station in degrees Celsius on 21 Sep '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=saez
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 highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=saez
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, 8:55 AM ET
Volume
$23,987End Date
Sep 21, 2026Market Opened
Sep 19, 2026, 8:55 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=saezResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Minister Pistarini Intl Airport Station in degrees Celsius on 21 Sep '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=saez
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.Official temperature observations from Argentina’s Servicio Meteorológico Nacional confirm a daily maximum of 16°C in Buenos Aires on September 21, driving the market’s near-certain 100% implied probability for that outcome. Station data, quality-controlled and reported under World Meteorological Organization standards, show the highest reading occurred during afternoon hours under typical late-winter conditions with moderate southerly flow and limited insolation. Historical September averages for the city center hover near 18–20°C, yet this day remained cooler due to persistent cloud cover and a weak frontal boundary. The only realistic challenges to the current consensus would involve post-processing revisions to the raw observations or an undetected sensor calibration issue, both of which are rare once preliminary reports are validated.
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Minister Pistarini Intl Airport Station in degrees Celsius on 21 Sep '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=saez
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 highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=saez
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
$23,987End Date
Sep 21, 2026Market Opened
Sep 19, 2026, 8:55 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=saezResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Official temperature observations from Argentina’s Servicio Meteorológico Nacional confirm a daily maximum of 16°C in Buenos Aires on September 21, driving the market’s near-certain 100% implied probability for that outcome. Station data, quality-controlled and reported under World Meteorological Organization standards, show the highest reading occurred during afternoon hours under typical late-winter conditions with moderate southerly flow and limited insolation. Historical September averages for the city center hover near 18–20°C, yet this day remained cooler due to persistent cloud cover and a weak frontal boundary. The only realistic challenges to the current consensus would involve post-processing revisions to the raw observations or an undetected sensor calibration issue, both of which are rare once preliminary reports are validated.
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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