Official observations from the Amsterdam Airport Schiphol meteorological station—the market's resolution source via Wunderground and aligned with KNMI data—confirm the highest temperature on April 21, 2026, reached exactly 14°C, driving the 100% trader consensus on this outcome. Cool northerly winds and persistent cloud cover suppressed warming despite a pre-event KNMI forecast of up to 15°C, consistent with below-average spring conditions influenced by a neutral-to-weak La Niña pattern lingering into early 2026. Historical April maxima at Schiphol average 12–14°C, reinforcing this positioning. Realistic challenges are minimal, limited to rare post hoc data corrections from quality control audits, but multiple METAR reports (peaking near 9–10°C midday) and finalized daily records make revisions improbable.
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 21?
Highest temperature in Amsterdam on April 21?
14°C 100.0%
9°C or below <1%
10°C <1%
11°C <1%
$100,557 Vol.
$100,557 Vol.
Apr 21, 2026
9°C or below
No
10°C
No
11°C
No
12°C
No
13°C
No
14°C
Yes
15°C
No
16°C
No
17°C
No
18°C
No
19°C or higher
No
14°C 100.0%
9°C or below <1%
10°C <1%
11°C <1%
$100,557 Vol.
$100,557 Vol.
Apr 21, 2026
9°C or below
$3,731 Vol.
No
10°C
$3,130 Vol.
No
11°C
$1,714 Vol.
No
12°C
$11,950 Vol.
No
13°C
$50,918 Vol.
No
14°C
$12,343 Vol.
Yes
15°C
$5,602 Vol.
No
16°C
$5,436 Vol.
No
17°C
$3,771 Vol.
No
18°C
$983 Vol.
No
19°C or higher
$979 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 21 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 observations from the Amsterdam Airport Schiphol meteorological station—the market's resolution source via Wunderground and aligned with KNMI data—confirm the highest temperature on April 21, 2026, reached exactly 14°C, driving the 100% trader consensus on this outcome. Cool northerly winds and persistent cloud cover suppressed warming despite a pre-event KNMI forecast of up to 15°C, consistent with below-average spring conditions influenced by a neutral-to-weak La Niña pattern lingering into early 2026. Historical April maxima at Schiphol average 12–14°C, reinforcing this positioning. Realistic challenges are minimal, limited to rare post hoc data corrections from quality control audits, but multiple METAR reports (peaking near 9–10°C midday) and finalized daily records make revisions improbable.
This market will resolve to the temperature range that contains the highest temperature recorded at the Amsterdam Airport Schiphol Station in degrees Celsius on 21 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 19, 2026, 12:10 AM ET
Volume
$100,557End Date
Apr 21, 2026Market Opened
Apr 19, 2026, 12:10 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 21 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 observations from the Amsterdam Airport Schiphol meteorological station—the market's resolution source via Wunderground and aligned with KNMI data—confirm the highest temperature on April 21, 2026, reached exactly 14°C, driving the 100% trader consensus on this outcome. Cool northerly winds and persistent cloud cover suppressed warming despite a pre-event KNMI forecast of up to 15°C, consistent with below-average spring conditions influenced by a neutral-to-weak La Niña pattern lingering into early 2026. Historical April maxima at Schiphol average 12–14°C, reinforcing this positioning. Realistic challenges are minimal, limited to rare post hoc data corrections from quality control audits, but multiple METAR reports (peaking near 9–10°C midday) and finalized daily records make revisions improbable.
This market will resolve to the temperature range that contains the highest temperature recorded at the Amsterdam Airport Schiphol Station in degrees Celsius on 21 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
$100,557End Date
Apr 21, 2026Market Opened
Apr 19, 2026, 12:10 AM ETResolution Source
https://www.wunderground.com/history/daily/nl/schiphol/EHAMResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Official observations from the Amsterdam Airport Schiphol meteorological station—the market's resolution source via Wunderground and aligned with KNMI data—confirm the highest temperature on April 21, 2026, reached exactly 14°C, driving the 100% trader consensus on this outcome. Cool northerly winds and persistent cloud cover suppressed warming despite a pre-event KNMI forecast of up to 15°C, consistent with below-average spring conditions influenced by a neutral-to-weak La Niña pattern lingering into early 2026. Historical April maxima at Schiphol average 12–14°C, reinforcing this positioning. Realistic challenges are minimal, limited to rare post hoc data corrections from quality control audits, but multiple METAR reports (peaking near 9–10°C midday) and finalized daily records make revisions improbable.
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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