Finnish Meteorological Institute observations at Helsinki's Kaisaniemi station confirm a midday peak temperature of 18°C today amid brief sunny intervals, aligning with trader consensus pricing 18°C at virtually 100% implied probability for the market's resolution criterion—the highest whole-degree reading at Helsinki-Vantaa Airport via Wunderground data. ECMWF and FMI HARMONIE model ensembles had forecasted daytime highs of 17–19°C, with temperatures rising from overnight lows near 10°C before cloud cover, moderate winds, and sunset curbed further intensification. While inherent measurement uncertainties exist, station discrepancies below 1°C are rare, and final FMI bulletins expected within 24 hours are unlikely to shift the outcome barring an improbable late-afternoon solar heating surge.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Helsinki on May 13?
Highest temperature in Helsinki on May 13?
$47,370 Vol.
$47,370 Vol.
18°C
100%
19°C or higher
<1%
$47,370 Vol.
$47,370 Vol.
18°C
100%
19°C or higher
<1%
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 Helsinki Vantaa Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/fi/vantaa/EFHK.
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 11, 2026, 12:51 AM ET
Resolution Source
https://www.wunderground.com/history/daily/fi/vantaa/EFHKResolver
0x69c47De9D...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 Helsinki Vantaa Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/fi/vantaa/EFHK.
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/fi/vantaa/EFHKResolver
0x69c47De9D...Finnish Meteorological Institute observations at Helsinki's Kaisaniemi station confirm a midday peak temperature of 18°C today amid brief sunny intervals, aligning with trader consensus pricing 18°C at virtually 100% implied probability for the market's resolution criterion—the highest whole-degree reading at Helsinki-Vantaa Airport via Wunderground data. ECMWF and FMI HARMONIE model ensembles had forecasted daytime highs of 17–19°C, with temperatures rising from overnight lows near 10°C before cloud cover, moderate winds, and sunset curbed further intensification. While inherent measurement uncertainties exist, station discrepancies below 1°C are rare, and final FMI bulletins expected within 24 hours are unlikely to shift the outcome barring an improbable late-afternoon solar heating surge.
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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