Recent ensemble forecasts from the Finnish Meteorological Institute and ECMWF models indicate daytime highs in Helsinki on May 19 likely peaking near 20–21°C, driven by southerly airflow advecting milder Atlantic air masses under partly cloudy skies and light winds. This setup has shifted trader consensus toward the 20°C and 21°C outcomes as the most probable, reflecting modest warming relative to the mid-May climatological average of 14–16°C. Key variables include cloud cover timing and boundary-layer mixing that could cap or boost the maximum by 1–2°C, with final model runs and observational updates from Helsinki-Vantaa Airport expected to narrow the range ahead of 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 19?
Highest temperature in Helsinki on May 19?
21°C 31%
20°C 28%
22°C 18%
19°C 13%
NEW
NEW
May 19, 2026
13°C or below
<1%
14°C
<1%
15°C
<1%
16°C
1%
17°C
1%
18°C
3%
19°C
13%
20°C
28%
21°C
35%
22°C
18%
23°C or higher
6%
21°C 31%
20°C 28%
22°C 18%
19°C 13%
NEW
NEW
May 19, 2026
13°C or below
$212 Vol.
<1%
14°C
$212 Vol.
<1%
15°C
$362 Vol.
<1%
16°C
$222 Vol.
1%
17°C
$189 Vol.
1%
18°C
$354 Vol.
3%
19°C
$407 Vol.
13%
20°C
$233 Vol.
28%
21°C
$260 Vol.
35%
22°C
$168 Vol.
18%
23°C or higher
$441 Vol.
6%
This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 19 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 models indicate daytime highs in Helsinki on May 19 likely peaking near 20–21°C, driven by southerly airflow advecting milder Atlantic air masses under partly cloudy skies and light winds. This setup has shifted trader consensus toward the 20°C and 21°C outcomes as the most probable, reflecting modest warming relative to the mid-May climatological average of 14–16°C. Key variables include cloud cover timing and boundary-layer mixing that could cap or boost the maximum by 1–2°C, with final model runs and observational updates from Helsinki-Vantaa Airport expected to narrow the range ahead of 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 19 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 17, 2026, 12:06 AM ET
Volume
$3,055End Date
May 19, 2026Market Opened
May 17, 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 19 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 models indicate daytime highs in Helsinki on May 19 likely peaking near 20–21°C, driven by southerly airflow advecting milder Atlantic air masses under partly cloudy skies and light winds. This setup has shifted trader consensus toward the 20°C and 21°C outcomes as the most probable, reflecting modest warming relative to the mid-May climatological average of 14–16°C. Key variables include cloud cover timing and boundary-layer mixing that could cap or boost the maximum by 1–2°C, with final model runs and observational updates from Helsinki-Vantaa Airport expected to narrow the range ahead of 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 19 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
$3,055End Date
May 19, 2026Market Opened
May 17, 2026, 12:06 AM ETResolution Source
https://www.wunderground.com/history/daily/fi/vantaa/EFHKRecent ensemble forecasts from the Finnish Meteorological Institute and ECMWF models indicate daytime highs in Helsinki on May 19 likely peaking near 20–21°C, driven by southerly airflow advecting milder Atlantic air masses under partly cloudy skies and light winds. This setup has shifted trader consensus toward the 20°C and 21°C outcomes as the most probable, reflecting modest warming relative to the mid-May climatological average of 14–16°C. Key variables include cloud cover timing and boundary-layer mixing that could cap or boost the maximum by 1–2°C, with final model runs and observational updates from Helsinki-Vantaa Airport expected to narrow the range ahead of 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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