Current observational data from Dutch meteorological stations, including those operated by the Royal Netherlands Meteorological Institute (KNMI), show a daily maximum of 21°C in Amsterdam on September 13. This reading aligns with the market-implied outcome at 100% probability, driven by real-time surface temperature measurements and the absence of any upward revision in afternoon peaks. Model consensus from short-range forecasts had anticipated mild late-summer conditions with limited diurnal warming, consistent with typical early-September climatology for the region. A later official quality-controlled adjustment exceeding 21°C or an undetected microclimate spike could theoretically shift resolution, though such revisions are rare once preliminary highs are reported.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Amsterdam on September 13?
Highest temperature in Amsterdam on September 13?
21°C 100.0%
14°C or below <1%
15°C <1%
16°C <1%
$45,202 Vol.
$45,202 Vol.
Sep 13, 2026
14°C or below
No
15°C
No
16°C
No
17°C
No
18°C
No
19°C
No
20°C
No
21°C
Yes
22°C
No
23°C
No
24°C or higher
No
21°C 100.0%
14°C or below <1%
15°C <1%
16°C <1%
$45,202 Vol.
$45,202 Vol.
Sep 13, 2026
14°C or below
$137 Vol.
No
15°C
$121 Vol.
No
16°C
$887 Vol.
No
17°C
$25 Vol.
No
18°C
$260 Vol.
No
19°C
$6,105 Vol.
No
20°C
$12,340 Vol.
No
21°C
$12,414 Vol.
Yes
22°C
$7,067 Vol.
No
23°C
$4,284 Vol.
No
24°C or higher
$1,561 Vol.
No
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Amsterdam Airport Schiphol Station in degrees Celsius on 13 Sep '26.
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=eham
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.Current observational data from Dutch meteorological stations, including those operated by the Royal Netherlands Meteorological Institute (KNMI), show a daily maximum of 21°C in Amsterdam on September 13. This reading aligns with the market-implied outcome at 100% probability, driven by real-time surface temperature measurements and the absence of any upward revision in afternoon peaks. Model consensus from short-range forecasts had anticipated mild late-summer conditions with limited diurnal warming, consistent with typical early-September climatology for the region. A later official quality-controlled adjustment exceeding 21°C or an undetected microclimate spike could theoretically shift resolution, though such revisions are rare once preliminary highs are reported.
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Amsterdam Airport Schiphol Station in degrees Celsius on 13 Sep '26.
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=eham
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 highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=eham
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, 12:58 AM ET
Volume
$45,202End Date
Sep 13, 2026Market Opened
Sep 11, 2026, 12:58 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=ehamResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Amsterdam Airport Schiphol Station in degrees Celsius on 13 Sep '26.
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=eham
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.Current observational data from Dutch meteorological stations, including those operated by the Royal Netherlands Meteorological Institute (KNMI), show a daily maximum of 21°C in Amsterdam on September 13. This reading aligns with the market-implied outcome at 100% probability, driven by real-time surface temperature measurements and the absence of any upward revision in afternoon peaks. Model consensus from short-range forecasts had anticipated mild late-summer conditions with limited diurnal warming, consistent with typical early-September climatology for the region. A later official quality-controlled adjustment exceeding 21°C or an undetected microclimate spike could theoretically shift resolution, though such revisions are rare once preliminary highs are reported.
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Amsterdam Airport Schiphol Station in degrees Celsius on 13 Sep '26.
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=eham
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 highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=eham
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
$45,202End Date
Sep 13, 2026Market Opened
Sep 11, 2026, 12:58 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=ehamResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Current observational data from Dutch meteorological stations, including those operated by the Royal Netherlands Meteorological Institute (KNMI), show a daily maximum of 21°C in Amsterdam on September 13. This reading aligns with the market-implied outcome at 100% probability, driven by real-time surface temperature measurements and the absence of any upward revision in afternoon peaks. Model consensus from short-range forecasts had anticipated mild late-summer conditions with limited diurnal warming, consistent with typical early-September climatology for the region. A later official quality-controlled adjustment exceeding 21°C or an undetected microclimate spike could theoretically shift resolution, though such revisions are rare once preliminary highs are reported.
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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