Latest numerical weather prediction models from sources like the ECMWF and GFS indicate a stable high-pressure regime over northern Italy, with light variable winds and partly cloudy skies expected to moderate radiative cooling overnight into September 21. This setup supports a minimum temperature in Milan near 17–19°C, aligning closely with mid-September climatological norms of 15–17°C. Trader sentiment remains balanced between the 10°C-or-below and 20°C-or-higher brackets due to lingering uncertainty in exact cloud cover and boundary-layer mixing, which can shift the low by 1–2°C. Upcoming model updates and surface observations will refine resolution criteria around these thresholds.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedLowest temperature in Milan on September 21?
10°C or below 100%
20°C or higher 96%
16°C 40%
11°C 39%
10°C or below
100%
11°C
39%
12°C
39%
13°C
39%
14°C
39%
15°C
39%
16°C
40%
17°C
27%
18°C
39%
19°C
39%
20°C or higher
96%
10°C or below 100%
20°C or higher 96%
16°C 40%
11°C 39%
10°C or below
100%
11°C
39%
12°C
39%
13°C
39%
14°C
39%
15°C
39%
16°C
40%
17°C
27%
18°C
39%
19°C
39%
20°C or higher
96%
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=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 19, 2026, 12:30 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 lowest 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...Latest numerical weather prediction models from sources like the ECMWF and GFS indicate a stable high-pressure regime over northern Italy, with light variable winds and partly cloudy skies expected to moderate radiative cooling overnight into September 21. This setup supports a minimum temperature in Milan near 17–19°C, aligning closely with mid-September climatological norms of 15–17°C. Trader sentiment remains balanced between the 10°C-or-below and 20°C-or-higher brackets due to lingering uncertainty in exact cloud cover and boundary-layer mixing, which can shift the low by 1–2°C. Upcoming model updates and surface observations will refine resolution criteria around these thresholds.
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