Forecast models from sources including ECMWF and GFS indicate a stable high-pressure regime over northern Italy, supporting partly cloudy skies, light easterly winds, and minimal precipitation for Milan on September 13. Morning observations near 17–18°C are expected to climb steadily, with afternoon peaks most likely reaching 26°C under clear to partly cloudy conditions typical for mid-September in the Po Valley. Trader positioning heavily favors 26°C (66.5% implied probability), followed by 27°C (23%), reflecting model consensus on modest warmth without significant heat advection or cloud cover to alter the outcome. Updated short-range guidance through midday will refine exact maxima before resolution.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Milan on September 13?
26°C 69%
27°C 24%
25°C 8%
28°C 1.4%
$21,367 Vol.
$21,367 Vol.
19°C or below
<1%
20°C
<1%
21°C
<1%
22°C
<1%
23°C
<1%
24°C
1%
25°C
8%
26°C
69%
27°C
24%
28°C
1%
29°C or higher
<1%
26°C 69%
27°C 24%
25°C 8%
28°C 1.4%
$21,367 Vol.
$21,367 Vol.
19°C or below
<1%
20°C
<1%
21°C
<1%
22°C
<1%
23°C
<1%
24°C
1%
25°C
8%
26°C
69%
27°C
24%
28°C
1%
29°C or higher
<1%
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=limc
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 11, 2026, 12:56 AM ET
Resolution Source
https://www.weather.gov/wrh/timeseries?site=limcResolver
0x69c47De9D...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=limc
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=limcResolver
0x69c47De9D...Forecast models from sources including ECMWF and GFS indicate a stable high-pressure regime over northern Italy, supporting partly cloudy skies, light easterly winds, and minimal precipitation for Milan on September 13. Morning observations near 17–18°C are expected to climb steadily, with afternoon peaks most likely reaching 26°C under clear to partly cloudy conditions typical for mid-September in the Po Valley. Trader positioning heavily favors 26°C (66.5% implied probability), followed by 27°C (23%), reflecting model consensus on modest warmth without significant heat advection or cloud cover to alter the outcome. Updated short-range guidance through midday will refine exact maxima before resolution.
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