Official KNMI observations from Schiphol Airport station—the authoritative reference for Amsterdam weather—confirm the highest temperature on May 11, 2026, reached 11°C amid a cool, unsettled day featuring light showers, northwest winds at force 5, and partial cloud cover that limited solar heating. Preliminary hourly data released overnight, showing a midday peak at 11°C before dropping to 6.9°C by evening, drove trader consensus to near-certainty, aligning with pre-event forecasts of maximums around 11°C under a low-pressure system and polar air advection. While urban heat islands in central Amsterdam could theoretically register 1°C higher, historical precedents and resolution criteria favor Schiphol's verified measurements; only a rare data correction from KNMI would challenge this positioning. Final daily summaries expected today reinforce the market-implied outcome.
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 May 11?
11°C 100.0%
6°C or below <1%
7°C <1%
8°C <1%
$77,778 Vol.
$77,778 Vol.
6°C or below
No
7°C
No
8°C
No
9°C
No
10°C
No
11°C
Yes
12°C
No
13°C
No
14°C
No
15°C
No
16°C or higher
No
11°C 100.0%
6°C or below <1%
7°C <1%
8°C <1%
$77,778 Vol.
$77,778 Vol.
6°C or below
No
7°C
No
8°C
No
9°C
No
10°C
No
11°C
Yes
12°C
No
13°C
No
14°C
No
15°C
No
16°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: May 9, 2026, 5:16 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 Schiphol Airport station—the authoritative reference for Amsterdam weather—confirm the highest temperature on May 11, 2026, reached 11°C amid a cool, unsettled day featuring light showers, northwest winds at force 5, and partial cloud cover that limited solar heating. Preliminary hourly data released overnight, showing a midday peak at 11°C before dropping to 6.9°C by evening, drove trader consensus to near-certainty, aligning with pre-event forecasts of maximums around 11°C under a low-pressure system and polar air advection. While urban heat islands in central Amsterdam could theoretically register 1°C higher, historical precedents and resolution criteria favor Schiphol's verified measurements; only a rare data correction from KNMI would challenge this positioning. Final daily summaries expected today reinforce the market-implied outcome.
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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