Official KNMI observations at Amsterdam Airport Schiphol—the market's designated resolution source—confirm the highest temperature on April 20 reached exactly 12°C, driving trader consensus to a 100% implied probability on that outcome as provisional data solidifies post-midnight. This aligns with cool maritime airflow from northwesterly winds at 3 Beaufort, scattered showers, and cloudy conditions limiting solar heating, consistent with ECMWF model guidance from the prior 48 hours predicting highs in the 11–13°C range. Historical April norms around 13°C provide context, though recent weeks' variable spring patterns underscore measurement precision from automated sensors. Revisions remain theoretically possible if data audits reveal sensor anomalies, but such changes are exceedingly rare after 24 hours.
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 April 20?
Highest temperature in Amsterdam on April 20?
12°C 100.0%
8°C or below <1%
9°C <1%
10°C <1%
$123,284 Vol.
$123,284 Vol.
Apr 20, 2026
8°C or below
No
9°C
No
10°C
No
11°C
No
12°C
Yes
13°C
No
14°C
No
15°C
No
16°C
No
17°C
No
18°C or higher
No
12°C 100.0%
8°C or below <1%
9°C <1%
10°C <1%
$123,284 Vol.
$123,284 Vol.
Apr 20, 2026
8°C or below
$2,134 Vol.
No
9°C
$7,785 Vol.
No
10°C
$42,651 Vol.
No
11°C
$23,305 Vol.
No
12°C
$15,669 Vol.
Yes
13°C
$11,649 Vol.
No
14°C
$10,253 Vol.
No
15°C
$3,607 Vol.
No
16°C
$1,979 Vol.
No
17°C
$1,856 Vol.
No
18°C or higher
$2,396 Vol.
No
This market will resolve to the temperature range that contains the highest temperature recorded at the Amsterdam Airport Schiphol Station in degrees Celsius on 20 Apr '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Amsterdam Airport Schiphol Station once information is finalized, available here: https://www.wunderground.com/history/daily/nl/schiphol/EHAM.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve to "Yes" until all data for this date has been finalized.
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.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.Official KNMI observations at Amsterdam Airport Schiphol—the market's designated resolution source—confirm the highest temperature on April 20 reached exactly 12°C, driving trader consensus to a 100% implied probability on that outcome as provisional data solidifies post-midnight. This aligns with cool maritime airflow from northwesterly winds at 3 Beaufort, scattered showers, and cloudy conditions limiting solar heating, consistent with ECMWF model guidance from the prior 48 hours predicting highs in the 11–13°C range. Historical April norms around 13°C provide context, though recent weeks' variable spring patterns underscore measurement precision from automated sensors. Revisions remain theoretically possible if data audits reveal sensor anomalies, but such changes are exceedingly rare after 24 hours.
This market will resolve to the temperature range that contains the highest temperature recorded at the Amsterdam Airport Schiphol Station in degrees Celsius on 20 Apr '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Amsterdam Airport Schiphol Station once information is finalized, available here: https://www.wunderground.com/history/daily/nl/schiphol/EHAM.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve to "Yes" until all data for this date has been finalized.
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.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Amsterdam Airport Schiphol Station once information is finalized, available here: https://www.wunderground.com/history/daily/nl/schiphol/EHAM.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve to "Yes" until all data for this date has been finalized.
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.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
Market Opened: Apr 18, 2026, 12:40 AM ET
Volume
$123,284End Date
Apr 20, 2026Market Opened
Apr 18, 2026, 12:40 AM ETResolution Source
https://www.wunderground.com/history/daily/nl/schiphol/EHAMResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
This market will resolve to the temperature range that contains the highest temperature recorded at the Amsterdam Airport Schiphol Station in degrees Celsius on 20 Apr '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Amsterdam Airport Schiphol Station once information is finalized, available here: https://www.wunderground.com/history/daily/nl/schiphol/EHAM.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve to "Yes" until all data for this date has been finalized.
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.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.Official KNMI observations at Amsterdam Airport Schiphol—the market's designated resolution source—confirm the highest temperature on April 20 reached exactly 12°C, driving trader consensus to a 100% implied probability on that outcome as provisional data solidifies post-midnight. This aligns with cool maritime airflow from northwesterly winds at 3 Beaufort, scattered showers, and cloudy conditions limiting solar heating, consistent with ECMWF model guidance from the prior 48 hours predicting highs in the 11–13°C range. Historical April norms around 13°C provide context, though recent weeks' variable spring patterns underscore measurement precision from automated sensors. Revisions remain theoretically possible if data audits reveal sensor anomalies, but such changes are exceedingly rare after 24 hours.
This market will resolve to the temperature range that contains the highest temperature recorded at the Amsterdam Airport Schiphol Station in degrees Celsius on 20 Apr '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Amsterdam Airport Schiphol Station once information is finalized, available here: https://www.wunderground.com/history/daily/nl/schiphol/EHAM.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve to "Yes" until all data for this date has been finalized.
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.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Amsterdam Airport Schiphol Station once information is finalized, available here: https://www.wunderground.com/history/daily/nl/schiphol/EHAM.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve to "Yes" until all data for this date has been finalized.
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.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
Volume
$123,284End Date
Apr 20, 2026Market Opened
Apr 18, 2026, 12:40 AM ETResolution Source
https://www.wunderground.com/history/daily/nl/schiphol/EHAMResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Official KNMI observations at Amsterdam Airport Schiphol—the market's designated resolution source—confirm the highest temperature on April 20 reached exactly 12°C, driving trader consensus to a 100% implied probability on that outcome as provisional data solidifies post-midnight. This aligns with cool maritime airflow from northwesterly winds at 3 Beaufort, scattered showers, and cloudy conditions limiting solar heating, consistent with ECMWF model guidance from the prior 48 hours predicting highs in the 11–13°C range. Historical April norms around 13°C provide context, though recent weeks' variable spring patterns underscore measurement precision from automated sensors. Revisions remain theoretically possible if data audits reveal sensor anomalies, but such changes are exceedingly rare after 24 hours.
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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