A cold front and associated polar air mass have advanced into central Argentina this week, driving strong southerly to southeasterly winds that advect cooler maritime air over Buenos Aires ahead of September 13. Ensemble and deterministic models from GFS, ECMWF, and regional runs show nocturnal radiative cooling under partly clear skies, with the minimum temperature expected near 4–6 °C around dawn on the 13th; wind speeds of 7–9 m/s will enhance turbulent mixing but not alter the official dry-bulb reading used for market resolution. Recent observations confirm a sharp drop from mid-week values near 15 °C, consistent with September climatology for post-frontal conditions. Model spread in boundary-layer moisture and exact wind timing creates the balanced market-implied odds between sub-zero and single-digit outcomes above 8 °C, while the cluster around 4–5 °C reflects the current consensus minimum. Updated SMN and NWP guidance on the 12th will further refine the range.
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 13?
Lowest temperature in Buenos Aires on September 13?
-1°C or below 79%
9°C or higher 78%
1°C 40%
2°C 29%
NEW
NEW
Sep 13, 2026
-1°C or below
79%
0°C
25%
1°C
40%
2°C
29%
3°C
14%
4°C
14%
5°C
11%
6°C
16%
7°C
16%
8°C
16%
9°C or higher
78%
-1°C or below 79%
9°C or higher 78%
1°C 40%
2°C 29%
NEW
NEW
Sep 13, 2026
-1°C or below
$0 Vol.
79%
0°C
$0 Vol.
25%
1°C
$0 Vol.
40%
2°C
$0 Vol.
29%
3°C
$0 Vol.
14%
4°C
$0 Vol.
14%
5°C
$0 Vol.
11%
6°C
$0 Vol.
16%
7°C
$0 Vol.
16%
8°C
$0 Vol.
16%
9°C or higher
$0 Vol.
78%
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 13 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.A cold front and associated polar air mass have advanced into central Argentina this week, driving strong southerly to southeasterly winds that advect cooler maritime air over Buenos Aires ahead of September 13. Ensemble and deterministic models from GFS, ECMWF, and regional runs show nocturnal radiative cooling under partly clear skies, with the minimum temperature expected near 4–6 °C around dawn on the 13th; wind speeds of 7–9 m/s will enhance turbulent mixing but not alter the official dry-bulb reading used for market resolution. Recent observations confirm a sharp drop from mid-week values near 15 °C, consistent with September climatology for post-frontal conditions. Model spread in boundary-layer moisture and exact wind timing creates the balanced market-implied odds between sub-zero and single-digit outcomes above 8 °C, while the cluster around 4–5 °C reflects the current consensus minimum. Updated SMN and NWP guidance on the 12th will further refine the range.
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 13 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 11, 2026, 8:29 AM ET
Volume
$0End Date
Sep 13, 2026Market Opened
Sep 11, 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 13 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.A cold front and associated polar air mass have advanced into central Argentina this week, driving strong southerly to southeasterly winds that advect cooler maritime air over Buenos Aires ahead of September 13. Ensemble and deterministic models from GFS, ECMWF, and regional runs show nocturnal radiative cooling under partly clear skies, with the minimum temperature expected near 4–6 °C around dawn on the 13th; wind speeds of 7–9 m/s will enhance turbulent mixing but not alter the official dry-bulb reading used for market resolution. Recent observations confirm a sharp drop from mid-week values near 15 °C, consistent with September climatology for post-frontal conditions. Model spread in boundary-layer moisture and exact wind timing creates the balanced market-implied odds between sub-zero and single-digit outcomes above 8 °C, while the cluster around 4–5 °C reflects the current consensus minimum. Updated SMN and NWP guidance on the 12th will further refine the range.
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 13 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
$0End Date
Sep 13, 2026Market Opened
Sep 11, 2026, 8:29 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=saezResolver
0x69c47De9D...A cold front and associated polar air mass have advanced into central Argentina this week, driving strong southerly to southeasterly winds that advect cooler maritime air over Buenos Aires ahead of September 13. Ensemble and deterministic models from GFS, ECMWF, and regional runs show nocturnal radiative cooling under partly clear skies, with the minimum temperature expected near 4–6 °C around dawn on the 13th; wind speeds of 7–9 m/s will enhance turbulent mixing but not alter the official dry-bulb reading used for market resolution. Recent observations confirm a sharp drop from mid-week values near 15 °C, consistent with September climatology for post-frontal conditions. Model spread in boundary-layer moisture and exact wind timing creates the balanced market-implied odds between sub-zero and single-digit outcomes above 8 °C, while the cluster around 4–5 °C reflects the current consensus minimum. Updated SMN and NWP guidance on the 12th will further refine the range.
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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