Recent forecasts from Mexico's Servicio Meteorológico Nacional and global models indicate a minimum temperature near 13–15°C in Mexico City tonight, driven by the city's 2,240 m elevation promoting radiative cooling under partly cloudy skies with scattered showers. Northeast winds of 10–20 km/h and dew points around 10–13°C limit further drops, aligning with September climatology where overnight lows average 13°C. Model consensus shows limited overnight cooling potential from residual daytime heat and variable cloud cover, creating tight market-implied probabilities clustered around 13–15°C. Updated NHC-style guidance and station observations from Tacubaya will clarify the final reading before resolution.
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 22?
9°C 90%
10°C 90%
15°C or higher 51%
6°C 45.0%
$770 Vol.
$770 Vol.
5°C or below
1%
6°C
45%
7°C
45%
8°C
45%
9°C
90%
10°C
90%
11°C
20%
12°C
40%
13°C
45%
14°C
50%
15°C or higher
51%
9°C 90%
10°C 90%
15°C or higher 51%
6°C 45.0%
$770 Vol.
$770 Vol.
5°C or below
1%
6°C
45%
7°C
45%
8°C
45%
9°C
90%
10°C
90%
11°C
20%
12°C
40%
13°C
45%
14°C
50%
15°C or higher
51%
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 20, 2026, 8:29 AM ET
Resolution Source
https://www.weather.gov/wrh/timeseries?site=mmmxResolver
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=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.
Resolution Source
https://www.weather.gov/wrh/timeseries?site=mmmxResolver
0x69c47De9D...Recent forecasts from Mexico's Servicio Meteorológico Nacional and global models indicate a minimum temperature near 13–15°C in Mexico City tonight, driven by the city's 2,240 m elevation promoting radiative cooling under partly cloudy skies with scattered showers. Northeast winds of 10–20 km/h and dew points around 10–13°C limit further drops, aligning with September climatology where overnight lows average 13°C. Model consensus shows limited overnight cooling potential from residual daytime heat and variable cloud cover, creating tight market-implied probabilities clustered around 13–15°C. Updated NHC-style guidance and station observations from Tacubaya will clarify the final reading before resolution.
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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