Forecasts for Mexico City's overnight low on September 19 center on 12–14°C amid the Valley of Mexico's high-elevation radiative cooling under partly cloudy skies and light northerly winds. Multiple models show consensus near 12–13°C, with some runs holding the minimum at 14–15°C due to increased cloud cover and humidity from seasonal moisture that reduces heat loss. This narrow spread explains the tightly matched market-implied odds around 13–15°C, while lower outcomes remain discounted absent stronger cold-air advection or clearer conditions that could enhance cooling below typical September baselines of roughly 13°C. Updated model runs and surface observations through the night will refine the exact minimum 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 19?
Lowest temperature in Mexico City on September 19?
5°C or below 58%
14°C 44%
9°C 40%
10°C 40%
NEW
NEW
Sep 19, 2026
5°C or below
58%
6°C
1%
7°C
17%
8°C
17%
9°C
40%
10°C
40%
11°C
22%
12°C
22%
13°C
30%
14°C
36%
15°C or higher
30%
5°C or below 58%
14°C 44%
9°C 40%
10°C 40%
NEW
NEW
Sep 19, 2026
5°C or below
$100 Vol.
58%
6°C
$0 Vol.
1%
7°C
$0 Vol.
17%
8°C
$0 Vol.
17%
9°C
$0 Vol.
40%
10°C
$0 Vol.
40%
11°C
$15 Vol.
22%
12°C
$0 Vol.
22%
13°C
$12 Vol.
30%
14°C
$27 Vol.
36%
15°C or higher
$0 Vol.
30%
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 19 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.Forecasts for Mexico City's overnight low on September 19 center on 12–14°C amid the Valley of Mexico's high-elevation radiative cooling under partly cloudy skies and light northerly winds. Multiple models show consensus near 12–13°C, with some runs holding the minimum at 14–15°C due to increased cloud cover and humidity from seasonal moisture that reduces heat loss. This narrow spread explains the tightly matched market-implied odds around 13–15°C, while lower outcomes remain discounted absent stronger cold-air advection or clearer conditions that could enhance cooling below typical September baselines of roughly 13°C. Updated model runs and surface observations through the night will refine the exact minimum before resolution.
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 19 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 17, 2026, 8:29 AM ET
Volume
$153End Date
Sep 19, 2026Market Opened
Sep 17, 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 19 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.Forecasts for Mexico City's overnight low on September 19 center on 12–14°C amid the Valley of Mexico's high-elevation radiative cooling under partly cloudy skies and light northerly winds. Multiple models show consensus near 12–13°C, with some runs holding the minimum at 14–15°C due to increased cloud cover and humidity from seasonal moisture that reduces heat loss. This narrow spread explains the tightly matched market-implied odds around 13–15°C, while lower outcomes remain discounted absent stronger cold-air advection or clearer conditions that could enhance cooling below typical September baselines of roughly 13°C. Updated model runs and surface observations through the night will refine the exact minimum before resolution.
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 19 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
$153End Date
Sep 19, 2026Market Opened
Sep 17, 2026, 8:29 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=mmmxResolver
0x69c47De9D...Forecasts for Mexico City's overnight low on September 19 center on 12–14°C amid the Valley of Mexico's high-elevation radiative cooling under partly cloudy skies and light northerly winds. Multiple models show consensus near 12–13°C, with some runs holding the minimum at 14–15°C due to increased cloud cover and humidity from seasonal moisture that reduces heat loss. This narrow spread explains the tightly matched market-implied odds around 13–15°C, while lower outcomes remain discounted absent stronger cold-air advection or clearer conditions that could enhance cooling below typical September baselines of roughly 13°C. Updated model runs and surface observations through the night will refine the exact minimum 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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