Recent forecast model consensus from agencies including the UK Met Office and European sources points to a September 18 maximum near 24°C in Mexico City, supported by moderate daytime heating under mostly cloudy skies, light northerly flow, and scattered light rain that limits afternoon temperature spikes. This aligns with typical late-rainy-season conditions in the high-altitude basin, where historical September highs average 22–25°C and afternoon convection often caps extremes. Traders appear to weigh the 24°C outcome most heavily given stable short-range guidance and limited model spread, with upside to 25°C or higher hinging on any unexpected clearing. Updated runs ahead of the daily maximum will be the next key input for position adjustments.
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 18?
Highest temperature in Mexico City on September 18?
24°C 42%
25°C or higher 29%
23°C 22%
22°C 11%
NEW
$12,221 Vol.
NEW
$12,221 Vol.
Sep 18, 2026
15°C or below
<1%
16°C
<1%
17°C
<1%
18°C
<1%
19°C
<1%
20°C
<1%
21°C
1%
22°C
11%
23°C
22%
24°C
42%
25°C or higher
29%
24°C 42%
25°C or higher 29%
23°C 22%
22°C 11%
NEW
$12,221 Vol.
NEW
$12,221 Vol.
Sep 18, 2026
15°C or below
$31 Vol.
<1%
16°C
$31 Vol.
<1%
17°C
$31 Vol.
<1%
18°C
$31 Vol.
<1%
19°C
$31 Vol.
<1%
20°C
$53 Vol.
<1%
21°C
$509 Vol.
1%
22°C
$2,994 Vol.
11%
23°C
$2,804 Vol.
22%
24°C
$2,923 Vol.
42%
25°C or higher
$2,783 Vol.
29%
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 18 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.Recent forecast model consensus from agencies including the UK Met Office and European sources points to a September 18 maximum near 24°C in Mexico City, supported by moderate daytime heating under mostly cloudy skies, light northerly flow, and scattered light rain that limits afternoon temperature spikes. This aligns with typical late-rainy-season conditions in the high-altitude basin, where historical September highs average 22–25°C and afternoon convection often caps extremes. Traders appear to weigh the 24°C outcome most heavily given stable short-range guidance and limited model spread, with upside to 25°C or higher hinging on any unexpected clearing. Updated runs ahead of the daily maximum will be the next key input for position adjustments.
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 18 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 16, 2026, 8:56 AM ET
Volume
$12,221End Date
Sep 18, 2026Market Opened
Sep 16, 2026, 8:56 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=mmmxResolver
0x69c47De9D...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 18 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.Recent forecast model consensus from agencies including the UK Met Office and European sources points to a September 18 maximum near 24°C in Mexico City, supported by moderate daytime heating under mostly cloudy skies, light northerly flow, and scattered light rain that limits afternoon temperature spikes. This aligns with typical late-rainy-season conditions in the high-altitude basin, where historical September highs average 22–25°C and afternoon convection often caps extremes. Traders appear to weigh the 24°C outcome most heavily given stable short-range guidance and limited model spread, with upside to 25°C or higher hinging on any unexpected clearing. Updated runs ahead of the daily maximum will be the next key input for position adjustments.
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 18 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
$12,221End Date
Sep 18, 2026Market Opened
Sep 16, 2026, 8:56 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=mmmxResolver
0x69c47De9D...Recent forecast model consensus from agencies including the UK Met Office and European sources points to a September 18 maximum near 24°C in Mexico City, supported by moderate daytime heating under mostly cloudy skies, light northerly flow, and scattered light rain that limits afternoon temperature spikes. This aligns with typical late-rainy-season conditions in the high-altitude basin, where historical September highs average 22–25°C and afternoon convection often caps extremes. Traders appear to weigh the 24°C outcome most heavily given stable short-range guidance and limited model spread, with upside to 25°C or higher hinging on any unexpected clearing. Updated runs ahead of the daily maximum will be the next key input for position adjustments.
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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