Recent ensemble forecasts from the Finnish Meteorological Institute and ECMWF point to a daytime maximum near 16°C in Helsinki, supporting the dominant 83.5% market-implied odds for that outcome. A high-pressure ridge over southern Finland is promoting clear to partly cloudy skies and light southerly winds that advect milder Atlantic air, yielding modest solar heating above the climatological May average of 14–15°C at Helsinki-Vantaa Airport. Minor uncertainty remains in afternoon boundary-layer mixing and cloud timing, keeping the 17°C bin at 15% while rendering higher or lower thresholds negligible. Fresh midday model runs will refine any brief surges or caps before official resolution.
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 17?
Highest temperature in Helsinki on May 17?
16°C 87%
17°C 13%
18°C <1%
19°C or higher <1%
$36,246 Vol.
$36,246 Vol.
May 17, 2026
9°C or below
<1%
10°C
<1%
11°C
<1%
12°C
<1%
13°C
<1%
14°C
<1%
15°C
<1%
16°C
87%
17°C
13%
18°C
1%
19°C or higher
<1%
16°C 87%
17°C 13%
18°C <1%
19°C or higher <1%
$36,246 Vol.
$36,246 Vol.
May 17, 2026
9°C or below
$1,512 Vol.
<1%
10°C
$338 Vol.
<1%
11°C
$408 Vol.
<1%
12°C
$1,849 Vol.
<1%
13°C
$2,306 Vol.
<1%
14°C
$4,331 Vol.
<1%
15°C
$4,954 Vol.
<1%
16°C
$4,884 Vol.
87%
17°C
$4,968 Vol.
13%
18°C
$4,065 Vol.
1%
19°C or higher
$7,070 Vol.
<1%
This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 17 May '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 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.Recent ensemble forecasts from the Finnish Meteorological Institute and ECMWF point to a daytime maximum near 16°C in Helsinki, supporting the dominant 83.5% market-implied odds for that outcome. A high-pressure ridge over southern Finland is promoting clear to partly cloudy skies and light southerly winds that advect milder Atlantic air, yielding modest solar heating above the climatological May average of 14–15°C at Helsinki-Vantaa Airport. Minor uncertainty remains in afternoon boundary-layer mixing and cloud timing, keeping the 17°C bin at 15% while rendering higher or lower thresholds negligible. Fresh midday model runs will refine any brief surges or caps before official resolution.
This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 17 May '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 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.
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 15, 2026, 12:06 AM ET
Volume
$36,246End Date
May 17, 2026Market Opened
May 15, 2026, 12:06 AM ETResolution Source
https://www.wunderground.com/history/daily/fi/vantaa/EFHKThis market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 17 May '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 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.Recent ensemble forecasts from the Finnish Meteorological Institute and ECMWF point to a daytime maximum near 16°C in Helsinki, supporting the dominant 83.5% market-implied odds for that outcome. A high-pressure ridge over southern Finland is promoting clear to partly cloudy skies and light southerly winds that advect milder Atlantic air, yielding modest solar heating above the climatological May average of 14–15°C at Helsinki-Vantaa Airport. Minor uncertainty remains in afternoon boundary-layer mixing and cloud timing, keeping the 17°C bin at 15% while rendering higher or lower thresholds negligible. Fresh midday model runs will refine any brief surges or caps before official resolution.
This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 17 May '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 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.
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.
Volume
$36,246End Date
May 17, 2026Market Opened
May 15, 2026, 12:06 AM ETResolution Source
https://www.wunderground.com/history/daily/fi/vantaa/EFHKRecent ensemble forecasts from the Finnish Meteorological Institute and ECMWF point to a daytime maximum near 16°C in Helsinki, supporting the dominant 83.5% market-implied odds for that outcome. A high-pressure ridge over southern Finland is promoting clear to partly cloudy skies and light southerly winds that advect milder Atlantic air, yielding modest solar heating above the climatological May average of 14–15°C at Helsinki-Vantaa Airport. Minor uncertainty remains in afternoon boundary-layer mixing and cloud timing, keeping the 17°C bin at 15% while rendering higher or lower thresholds negligible. Fresh midday model runs will refine any brief surges or caps before official resolution.
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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