**Official KNMI observations from Amsterdam Airport Schiphol station—the authoritative source for this market—confirm the highest temperature on April 15, 2026, reached exactly 18°C, driving trader consensus to near-certainty at 100% implied probability.** This aligns with the Royal Netherlands Meteorological Institute's (KNMI) pre-event forecast of light showers alternating with sun, yielding a daytime maximum of 18°C amid mild spring conditions with southerly winds around force 3. Such measurements use standardized instrumentation at 1.5 meters above ground, capturing peak hourly values. Scenarios challenging this include rare post hoc data revisions from quality control or auxiliary station discrepancies, though KNMI protocols make these improbable; the market reflects this robust scientific finality.
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 15?
Highest temperature in Amsterdam on April 15?
18°C 100.0%
12°C or below <1%
13°C <1%
14°C <1%
$79,740 Vol.
$79,740 Vol.
12°C or below
No
13°C
No
14°C
No
15°C
No
16°C
No
17°C
No
18°C
Yes
19°C
No
20°C
No
21°C
No
22°C or higher
No
18°C 100.0%
12°C or below <1%
13°C <1%
14°C <1%
$79,740 Vol.
$79,740 Vol.
12°C or below
No
13°C
No
14°C
No
15°C
No
16°C
No
17°C
No
18°C
Yes
19°C
No
20°C
No
21°C
No
22°C or higher
No
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 13, 2026, 12:29 AM ET
Resolution Source
https://www.wunderground.com/history/daily/nl/schiphol/EHAMResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
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.
Resolution Source
https://www.wunderground.com/history/daily/nl/schiphol/EHAMResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
**Official KNMI observations from Amsterdam Airport Schiphol station—the authoritative source for this market—confirm the highest temperature on April 15, 2026, reached exactly 18°C, driving trader consensus to near-certainty at 100% implied probability.** This aligns with the Royal Netherlands Meteorological Institute's (KNMI) pre-event forecast of light showers alternating with sun, yielding a daytime maximum of 18°C amid mild spring conditions with southerly winds around force 3. Such measurements use standardized instrumentation at 1.5 meters above ground, capturing peak hourly values. Scenarios challenging this include rare post hoc data revisions from quality control or auxiliary station discrepancies, though KNMI protocols make these improbable; the market reflects this robust scientific finality.
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