**Current forecast models from the Servicio Meteorológico Nacional and international ensembles point to a daytime high near 22–23°C in Buenos Aires on September 18, driven by northeasterly flow off the Atlantic and increasing solar insolation during the Southern Hemisphere spring transition.** Partial cloud cover and a stable pressure gradient are limiting stronger warming, while dew points in the low teens Celsius and light winds moderate the peak. Model spread arises mainly from differences in predicted cloud fraction and boundary-layer mixing, which can shift the maximum by 1–2°C. Traders appear to weigh these variables against historical September maxima around 18–20°C, with the tight clustering between 22°C and 24°C reflecting modest uncertainty ahead of the next model runs and official SMN updates.
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 18?
Highest temperature in Buenos Aires on September 18?
23°C 34%
22°C 28%
24°C 21%
25°C 10%
NEW
NEW
Sep 18, 2026
16°C or below
<1%
17°C
<1%
18°C
<1%
19°C
1%
20°C
1%
21°C
6%
22°C
28%
23°C
34%
24°C
21%
25°C
10%
26°C or higher
4%
23°C 34%
22°C 28%
24°C 21%
25°C 10%
NEW
NEW
Sep 18, 2026
16°C or below
$149 Vol.
<1%
17°C
$149 Vol.
<1%
18°C
$199 Vol.
<1%
19°C
$137 Vol.
1%
20°C
$422 Vol.
1%
21°C
$342 Vol.
6%
22°C
$1,812 Vol.
28%
23°C
$424 Vol.
34%
24°C
$580 Vol.
21%
25°C
$530 Vol.
10%
26°C or higher
$196 Vol.
4%
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 18 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.**Current forecast models from the Servicio Meteorológico Nacional and international ensembles point to a daytime high near 22–23°C in Buenos Aires on September 18, driven by northeasterly flow off the Atlantic and increasing solar insolation during the Southern Hemisphere spring transition.** Partial cloud cover and a stable pressure gradient are limiting stronger warming, while dew points in the low teens Celsius and light winds moderate the peak. Model spread arises mainly from differences in predicted cloud fraction and boundary-layer mixing, which can shift the maximum by 1–2°C. Traders appear to weigh these variables against historical September maxima around 18–20°C, with the tight clustering between 22°C and 24°C reflecting modest uncertainty ahead of the next model runs and official SMN updates.
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 18 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 16, 2026, 8:55 AM ET
Volume
$4,941End Date
Sep 18, 2026Market Opened
Sep 16, 2026, 8:55 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=saezResolver
0x69c47De9D...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 18 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.**Current forecast models from the Servicio Meteorológico Nacional and international ensembles point to a daytime high near 22–23°C in Buenos Aires on September 18, driven by northeasterly flow off the Atlantic and increasing solar insolation during the Southern Hemisphere spring transition.** Partial cloud cover and a stable pressure gradient are limiting stronger warming, while dew points in the low teens Celsius and light winds moderate the peak. Model spread arises mainly from differences in predicted cloud fraction and boundary-layer mixing, which can shift the maximum by 1–2°C. Traders appear to weigh these variables against historical September maxima around 18–20°C, with the tight clustering between 22°C and 24°C reflecting modest uncertainty ahead of the next model runs and official SMN updates.
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 18 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
$4,941End Date
Sep 18, 2026Market Opened
Sep 16, 2026, 8:55 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=saezResolver
0x69c47De9D...**Current forecast models from the Servicio Meteorológico Nacional and international ensembles point to a daytime high near 22–23°C in Buenos Aires on September 18, driven by northeasterly flow off the Atlantic and increasing solar insolation during the Southern Hemisphere spring transition.** Partial cloud cover and a stable pressure gradient are limiting stronger warming, while dew points in the low teens Celsius and light winds moderate the peak. Model spread arises mainly from differences in predicted cloud fraction and boundary-layer mixing, which can shift the maximum by 1–2°C. Traders appear to weigh these variables against historical September maxima around 18–20°C, with the tight clustering between 22°C and 24°C reflecting modest uncertainty ahead of the next model runs and official SMN updates.
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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