**Mexico City reached a daily high of at least 26 °C on September 12, 2026, according to multiple observational reports and hourly data showing afternoon peaks near or above that threshold under partly cloudy skies.** Typical September conditions feature average maxima around 25 °C, and this day aligned with or exceeded that baseline amid light winds and limited cloud cover that permitted strong solar heating. Official monitoring and real-time station readings confirmed the warmth, driving near-certain market-implied odds for the 26 °C-or-higher outcome. A realistic challenge would require a substantial downward revision in verified maximum temperature from authoritative sources such as national meteorological services, which remains improbable given consistent multi-source data.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Mexico City on September 12?
Highest temperature in Mexico City on September 12?
26°C or higher 100.0%
16°C or below <1%
17°C <1%
18°C <1%
$17,890 Vol.
$17,890 Vol.
Sep 12, 2026
16°C or below
No
17°C
No
18°C
No
19°C
No
20°C
No
21°C
No
22°C
No
23°C
No
24°C
No
25°C
No
26°C or higher
Yes
26°C or higher 100.0%
16°C or below <1%
17°C <1%
18°C <1%
$17,890 Vol.
$17,890 Vol.
Sep 12, 2026
16°C or below
$127 Vol.
No
17°C
$127 Vol.
No
18°C
$127 Vol.
No
19°C
$112 Vol.
No
20°C
$329 Vol.
No
21°C
$336 Vol.
No
22°C
$1,474 Vol.
No
23°C
$1,894 Vol.
No
24°C
$2,777 Vol.
No
25°C
$4,421 Vol.
No
26°C or higher
$6,166 Vol.
Yes
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Benito Juárez International Airport Station in degrees Celsius on 12 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=mmmx
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.**Mexico City reached a daily high of at least 26 °C on September 12, 2026, according to multiple observational reports and hourly data showing afternoon peaks near or above that threshold under partly cloudy skies.** Typical September conditions feature average maxima around 25 °C, and this day aligned with or exceeded that baseline amid light winds and limited cloud cover that permitted strong solar heating. Official monitoring and real-time station readings confirmed the warmth, driving near-certain market-implied odds for the 26 °C-or-higher outcome. A realistic challenge would require a substantial downward revision in verified maximum temperature from authoritative sources such as national meteorological services, which remains improbable given consistent multi-source data.
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Benito Juárez International Airport Station in degrees Celsius on 12 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=mmmx
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=mmmx
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 10, 2026, 8:56 AM ET
Volume
$17,890End Date
Sep 12, 2026Market Opened
Sep 10, 2026, 8:56 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=mmmxResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Benito Juárez International Airport Station in degrees Celsius on 12 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=mmmx
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.**Mexico City reached a daily high of at least 26 °C on September 12, 2026, according to multiple observational reports and hourly data showing afternoon peaks near or above that threshold under partly cloudy skies.** Typical September conditions feature average maxima around 25 °C, and this day aligned with or exceeded that baseline amid light winds and limited cloud cover that permitted strong solar heating. Official monitoring and real-time station readings confirmed the warmth, driving near-certain market-implied odds for the 26 °C-or-higher outcome. A realistic challenge would require a substantial downward revision in verified maximum temperature from authoritative sources such as national meteorological services, which remains improbable given consistent multi-source data.
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Benito Juárez International Airport Station in degrees Celsius on 12 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=mmmx
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=mmmx
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
$17,890End Date
Sep 12, 2026Market Opened
Sep 10, 2026, 8:56 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=mmmxResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
**Mexico City reached a daily high of at least 26 °C on September 12, 2026, according to multiple observational reports and hourly data showing afternoon peaks near or above that threshold under partly cloudy skies.** Typical September conditions feature average maxima around 25 °C, and this day aligned with or exceeded that baseline amid light winds and limited cloud cover that permitted strong solar heating. Official monitoring and real-time station readings confirmed the warmth, driving near-certain market-implied odds for the 26 °C-or-higher outcome. A realistic challenge would require a substantial downward revision in verified maximum temperature from authoritative sources such as national meteorological services, which remains improbable given consistent multi-source data.
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