Latest ensemble forecasts from global models point to a minimum temperature in Buenos Aires on September 25 near 15°C, shaped by a shift to westerly then southerly winds under partly clear skies that limit strong advection while allowing moderate nocturnal radiative cooling. Current conditions feature mild northerly flow and above-average temperatures for late September, with no major frontal systems or anomalous high-pressure setups expected to push extremes. Model consensus across runs shows limited spread around the mid-teens Celsius, though small timing differences in wind shifts or cloud cover could alter the exact low by 1–2°C. Traders’ balanced odds between sub-11°C and 21°C+ outcomes highlight uncertainty in resolving the precise minimum before official station data finalize the result.
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 25?
21°C or higher 92%
11°C or below 47%
19°C 37%
20°C 37%
11°C or below
47%
12°C
19%
13°C
21%
14°C
22%
15°C
21%
16°C
19%
17°C
19%
18°C
19%
19°C
37%
20°C
37%
21°C or higher
92%
21°C or higher 92%
11°C or below 47%
19°C 37%
20°C 37%
11°C or below
47%
12°C
19%
13°C
21%
14°C
22%
15°C
21%
16°C
19%
17°C
19%
18°C
19%
19°C
37%
20°C
37%
21°C or higher
92%
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 23, 2026, 8:29 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 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.
Resolution Source
https://www.weather.gov/wrh/timeseries?site=saezResolver
0x69c47De9D...Latest ensemble forecasts from global models point to a minimum temperature in Buenos Aires on September 25 near 15°C, shaped by a shift to westerly then southerly winds under partly clear skies that limit strong advection while allowing moderate nocturnal radiative cooling. Current conditions feature mild northerly flow and above-average temperatures for late September, with no major frontal systems or anomalous high-pressure setups expected to push extremes. Model consensus across runs shows limited spread around the mid-teens Celsius, though small timing differences in wind shifts or cloud cover could alter the exact low by 1–2°C. Traders’ balanced odds between sub-11°C and 21°C+ outcomes highlight uncertainty in resolving the precise minimum before official station data finalize the result.
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