**Southeast winds advected a cooler air mass into Buenos Aires on September 11, 2026, driving overnight lows toward the lower single digits Celsius and tightening market-implied odds around 8–9°C.** Official Servicio Meteorológico Nacional guidance and model consensus projected a minimum near 11–12°C under mostly cloudy skies, yet persistent 13–22 km/h southeasterlies with gusts to 50 km/h enhanced mixing and evaporative cooling while limiting radiational warming. Historical September climatology shows typical overnight minima of 10–12°C; the stronger-than-average flow and modest dew-point depression created measurable downside risk for the lowest reading. Traders appear to weigh these boundary-layer effects against potential under-forecasting by global models, keeping 9°C, 8°C, and 7°C-or-below bins closely matched pending final official station data.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedLowest temperature in Buenos Aires on September 11?
Lowest temperature in Buenos Aires on September 11?
8°C 92%
7°C or below 90%
9°C 52%
10°C <1%
$466 Vol.
$466 Vol.
Sep 11, 2026
7°C or below
90%
8°C
92%
9°C
52%
10°C
<1%
11°C
<1%
12°C
<1%
13°C
<1%
14°C
<1%
15°C
<1%
16°C
<1%
17°C or higher
<1%
8°C 92%
7°C or below 90%
9°C 52%
10°C <1%
$466 Vol.
$466 Vol.
Sep 11, 2026
7°C or below
$20 Vol.
90%
8°C
$32 Vol.
92%
9°C
$0 Vol.
52%
10°C
$96 Vol.
<1%
11°C
$165 Vol.
<1%
12°C
$128 Vol.
<1%
13°C
$5 Vol.
<1%
14°C
$5 Vol.
<1%
15°C
$5 Vol.
<1%
16°C
$5 Vol.
<1%
17°C or higher
$5 Vol.
<1%
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Minister Pistarini Intl Airport Station in degrees Celsius on 11 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=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.**Southeast winds advected a cooler air mass into Buenos Aires on September 11, 2026, driving overnight lows toward the lower single digits Celsius and tightening market-implied odds around 8–9°C.** Official Servicio Meteorológico Nacional guidance and model consensus projected a minimum near 11–12°C under mostly cloudy skies, yet persistent 13–22 km/h southeasterlies with gusts to 50 km/h enhanced mixing and evaporative cooling while limiting radiational warming. Historical September climatology shows typical overnight minima of 10–12°C; the stronger-than-average flow and modest dew-point depression created measurable downside risk for the lowest reading. Traders appear to weigh these boundary-layer effects against potential under-forecasting by global models, keeping 9°C, 8°C, and 7°C-or-below bins closely matched pending final official station data.
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Minister Pistarini Intl Airport Station in degrees Celsius on 11 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=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 lowest 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 9, 2026, 8:29 AM ET
Volume
$466End Date
Sep 11, 2026Market Opened
Sep 9, 2026, 8:29 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=saezResolver
0x69c47De9D...This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Minister Pistarini Intl Airport Station in degrees Celsius on 11 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=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.**Southeast winds advected a cooler air mass into Buenos Aires on September 11, 2026, driving overnight lows toward the lower single digits Celsius and tightening market-implied odds around 8–9°C.** Official Servicio Meteorológico Nacional guidance and model consensus projected a minimum near 11–12°C under mostly cloudy skies, yet persistent 13–22 km/h southeasterlies with gusts to 50 km/h enhanced mixing and evaporative cooling while limiting radiational warming. Historical September climatology shows typical overnight minima of 10–12°C; the stronger-than-average flow and modest dew-point depression created measurable downside risk for the lowest reading. Traders appear to weigh these boundary-layer effects against potential under-forecasting by global models, keeping 9°C, 8°C, and 7°C-or-below bins closely matched pending final official station data.
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Minister Pistarini Intl Airport Station in degrees Celsius on 11 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=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 lowest 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
$466End Date
Sep 11, 2026Market Opened
Sep 9, 2026, 8:29 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=saezResolver
0x69c47De9D...**Southeast winds advected a cooler air mass into Buenos Aires on September 11, 2026, driving overnight lows toward the lower single digits Celsius and tightening market-implied odds around 8–9°C.** Official Servicio Meteorológico Nacional guidance and model consensus projected a minimum near 11–12°C under mostly cloudy skies, yet persistent 13–22 km/h southeasterlies with gusts to 50 km/h enhanced mixing and evaporative cooling while limiting radiational warming. Historical September climatology shows typical overnight minima of 10–12°C; the stronger-than-average flow and modest dew-point depression created measurable downside risk for the lowest reading. Traders appear to weigh these boundary-layer effects against potential under-forecasting by global models, keeping 9°C, 8°C, and 7°C-or-below bins closely matched pending final official station data.
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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