Recent northerly winds and mostly clear skies are expected to drive daytime warming across Buenos Aires on September 17, shifting from cooler easterly flow on the 16th. Official forecasts from sources including the Servicio Meteorológico Nacional and international models show afternoon maxima centered near 23–24 °C under light winds and low humidity, with some guidance reaching 25 °C if insolation peaks. Historical September averages for the city hover around 18–20 °C, so this represents a notable positive anomaly. Trader consensus reflected in the 52.5 % implied probability for exactly 25 °C and 27.5 % for 26 °C or higher aligns with the upper end of current model spreads, while lower outcomes remain discounted absent significant cloud cover or frontal passage. Updated model runs and official observations tomorrow morning will refine the final maximum.
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 17?
25°C 53%
26°C or higher 28%
24°C 18%
23°C 4%
16°C or below
<1%
17°C
<1%
18°C
<1%
19°C
<1%
20°C
<1%
21°C
<1%
22°C
2%
23°C
4%
24°C
18%
25°C
53%
26°C or higher
28%
25°C 53%
26°C or higher 28%
24°C 18%
23°C 4%
16°C or below
<1%
17°C
<1%
18°C
<1%
19°C
<1%
20°C
<1%
21°C
<1%
22°C
2%
23°C
4%
24°C
18%
25°C
53%
26°C or higher
28%
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 15, 2026, 8:55 AM ET
Resolution Source
https://www.weather.gov/wrh/timeseries?site=saezResolver
0x69c47De9D...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.
Resolution Source
https://www.weather.gov/wrh/timeseries?site=saezResolver
0x69c47De9D...Recent northerly winds and mostly clear skies are expected to drive daytime warming across Buenos Aires on September 17, shifting from cooler easterly flow on the 16th. Official forecasts from sources including the Servicio Meteorológico Nacional and international models show afternoon maxima centered near 23–24 °C under light winds and low humidity, with some guidance reaching 25 °C if insolation peaks. Historical September averages for the city hover around 18–20 °C, so this represents a notable positive anomaly. Trader consensus reflected in the 52.5 % implied probability for exactly 25 °C and 27.5 % for 26 °C or higher aligns with the upper end of current model spreads, while lower outcomes remain discounted absent significant cloud cover or frontal passage. Updated model runs and official observations tomorrow morning will refine the final maximum.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
Beware of external links.
Beware of external links.
Frequently Asked Questions