Recent forecasts from multiple models indicate Madrid's overnight minimum on September 24 will likely fall in the upper teens Celsius, driven by persistent high pressure, clear skies, and light northeasterly winds that limit cloud cover and moderate radiative cooling. Current runs show lows around 16–21 °C, with daytime maxima near 33–34 °C under sunny conditions. Historical September averages place the date's mean low near 14 °C, but the ongoing warm anomaly keeps extremes below 16 °C or above 26 °C less probable. Traders appear to weigh model consensus against typical late-summer variability and the narrow window before resolution, as any shift in wind or cloud forecasts could adjust the final minimum.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedLowest temperature in Madrid on September 24?
26°C or higher 94%
16°C or below 56%
17°C 39%
18°C 39%
16°C or below
56%
17°C
39%
18°C
39%
19°C
39%
20°C
38%
21°C
38%
22°C
38%
23°C
38%
24°C
38%
25°C
38%
26°C or higher
94%
26°C or higher 94%
16°C or below 56%
17°C 39%
18°C 39%
16°C or below
56%
17°C
39%
18°C
39%
19°C
39%
20°C
38%
21°C
38%
22°C
38%
23°C
38%
24°C
38%
25°C
38%
26°C or higher
94%
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=lemd
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 22, 2026, 12:30 AM ET
Resolution Source
https://www.weather.gov/wrh/timeseries?site=lemdResolver
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=lemd
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=lemdResolver
0x69c47De9D...Recent forecasts from multiple models indicate Madrid's overnight minimum on September 24 will likely fall in the upper teens Celsius, driven by persistent high pressure, clear skies, and light northeasterly winds that limit cloud cover and moderate radiative cooling. Current runs show lows around 16–21 °C, with daytime maxima near 33–34 °C under sunny conditions. Historical September averages place the date's mean low near 14 °C, but the ongoing warm anomaly keeps extremes below 16 °C or above 26 °C less probable. Traders appear to weigh model consensus against typical late-summer variability and the narrow window before resolution, as any shift in wind or cloud forecasts could adjust the final minimum.
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