Persistent southwesterly flow ahead of an advancing low-pressure system is expected to deliver widespread cloud cover, light rain, and suppressed insolation across the Netherlands on September 8, limiting daytime heating. Official guidance and ensemble forecasts indicate a maximum near 19–20 °C at Amsterdam, close to the 1991–2020 average high of 20 °C for the date but cooler than recent days. Traders have therefore assigned the highest implied probability (66.5 %) to 20 °C, with 19 °C a clear secondary outcome at 28 %, reflecting the narrow range of likely maxima once precipitation and modest winds are factored in. Updated model runs and any shifts in the timing of heavier rain bands remain the key near-term variables that could nudge the realized high between these two values.
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 8?
20°C 69%
19°C 27%
21°C 5%
18°C 2%
$17,752 Vol.
$17,752 Vol.
15°C or below
<1%
16°C
<1%
17°C
1%
18°C
2%
19°C
27%
20°C
69%
21°C
5%
22°C
<1%
23°C
<1%
24°C
<1%
25°C or higher
<1%
20°C 69%
19°C 27%
21°C 5%
18°C 2%
$17,752 Vol.
$17,752 Vol.
15°C or below
<1%
16°C
<1%
17°C
1%
18°C
2%
19°C
27%
20°C
69%
21°C
5%
22°C
<1%
23°C
<1%
24°C
<1%
25°C or higher
<1%
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 6, 2026, 12:58 AM ET
Resolution Source
https://www.weather.gov/wrh/timeseries?site=ehamResolver
0x69c47De9D...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.
Resolution Source
https://www.weather.gov/wrh/timeseries?site=ehamResolver
0x69c47De9D...Persistent southwesterly flow ahead of an advancing low-pressure system is expected to deliver widespread cloud cover, light rain, and suppressed insolation across the Netherlands on September 8, limiting daytime heating. Official guidance and ensemble forecasts indicate a maximum near 19–20 °C at Amsterdam, close to the 1991–2020 average high of 20 °C for the date but cooler than recent days. Traders have therefore assigned the highest implied probability (66.5 %) to 20 °C, with 19 °C a clear secondary outcome at 28 %, reflecting the narrow range of likely maxima once precipitation and modest winds are factored in. Updated model runs and any shifts in the timing of heavier rain bands remain the key near-term variables that could nudge the realized high between these two values.
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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