Current forecast models from sources including the National Weather Service and European ensembles indicate Mexico City’s overnight low on September 21 will reach 12–14 °C, driven by the city’s 2,240 m elevation, clear to partly cloudy skies allowing efficient radiative cooling, and light northwesterly flow. Historical September minima cluster near 13 °C, with the 25th–75th percentile range spanning roughly 11–15 °C; dew points near 10–12 °C limit further drops absent stronger high-pressure subsidence. Trader consensus remains closely split between the 17 °C+ and sub-8 °C bins because model runs show minor sensitivity to exact cloud cover and any late-evening showers, while the tight clustering around 12–13 °C reflects the narrow expected diurnal range under typical late-summer conditions.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedLowest temperature in Mexico City on September 21?
Lowest temperature in Mexico City on September 21?
17°C or higher 100%
7°C or below 99%
12°C 98%
13°C 98%
NEW
NEW
Sep 21, 2026
7°C or below
99%
8°C
13%
9°C
13%
10°C
13%
11°C
36%
12°C
98%
13°C
98%
14°C
22%
15°C
37%
16°C
98%
17°C or higher
100%
17°C or higher 100%
7°C or below 99%
12°C 98%
13°C 98%
NEW
NEW
Sep 21, 2026
7°C or below
$0 Vol.
99%
8°C
$0 Vol.
13%
9°C
$0 Vol.
13%
10°C
$0 Vol.
13%
11°C
$0 Vol.
36%
12°C
$0 Vol.
98%
13°C
$0 Vol.
98%
14°C
$0 Vol.
22%
15°C
$0 Vol.
37%
16°C
$0 Vol.
98%
17°C or higher
$0 Vol.
100%
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Benito Juárez International Airport Station in degrees Celsius on 21 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=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.Current forecast models from sources including the National Weather Service and European ensembles indicate Mexico City’s overnight low on September 21 will reach 12–14 °C, driven by the city’s 2,240 m elevation, clear to partly cloudy skies allowing efficient radiative cooling, and light northwesterly flow. Historical September minima cluster near 13 °C, with the 25th–75th percentile range spanning roughly 11–15 °C; dew points near 10–12 °C limit further drops absent stronger high-pressure subsidence. Trader consensus remains closely split between the 17 °C+ and sub-8 °C bins because model runs show minor sensitivity to exact cloud cover and any late-evening showers, while the tight clustering around 12–13 °C reflects the narrow expected diurnal range under typical late-summer conditions.
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Benito Juárez International Airport Station in degrees Celsius on 21 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=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 lowest 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 19, 2026, 8:29 AM ET
Volume
$0End Date
Sep 21, 2026Market Opened
Sep 19, 2026, 8:29 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=mmmxResolver
0x69c47De9D...This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Benito Juárez International Airport Station in degrees Celsius on 21 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=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.Current forecast models from sources including the National Weather Service and European ensembles indicate Mexico City’s overnight low on September 21 will reach 12–14 °C, driven by the city’s 2,240 m elevation, clear to partly cloudy skies allowing efficient radiative cooling, and light northwesterly flow. Historical September minima cluster near 13 °C, with the 25th–75th percentile range spanning roughly 11–15 °C; dew points near 10–12 °C limit further drops absent stronger high-pressure subsidence. Trader consensus remains closely split between the 17 °C+ and sub-8 °C bins because model runs show minor sensitivity to exact cloud cover and any late-evening showers, while the tight clustering around 12–13 °C reflects the narrow expected diurnal range under typical late-summer conditions.
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Benito Juárez International Airport Station in degrees Celsius on 21 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=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 lowest 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
$0End Date
Sep 21, 2026Market Opened
Sep 19, 2026, 8:29 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=mmmxResolver
0x69c47De9D...Current forecast models from sources including the National Weather Service and European ensembles indicate Mexico City’s overnight low on September 21 will reach 12–14 °C, driven by the city’s 2,240 m elevation, clear to partly cloudy skies allowing efficient radiative cooling, and light northwesterly flow. Historical September minima cluster near 13 °C, with the 25th–75th percentile range spanning roughly 11–15 °C; dew points near 10–12 °C limit further drops absent stronger high-pressure subsidence. Trader consensus remains closely split between the 17 °C+ and sub-8 °C bins because model runs show minor sensitivity to exact cloud cover and any late-evening showers, while the tight clustering around 12–13 °C reflects the narrow expected diurnal range under typical late-summer conditions.
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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