Recent forecasts from the Finnish Meteorological Institute and ECMWF ensemble runs indicate a peak near 21°C in Helsinki on June 20, driven by moderate southerly flow and partial cloud cover limiting daytime heating. This places the market-implied probabilities—led by 23°C at 25.5% and 22°C at 18.5%—slightly above the latest model consensus, reflecting trader caution around potential warmer advection or clearer skies that could add 1–2°C. June climatology centers on 19–20°C highs with high day-to-day variability from Baltic Sea influences and frontal passages, keeping outcomes tightly clustered. Key upcoming updates include the next FMI and ECMWF model cycles, which will refine boundary-layer conditions and resolution criteria for the daily maximum.
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 June 20?
Highest temperature in Helsinki on June 20?
24°C 100.0%
17°C or below <1%
18°C <1%
19°C <1%
$42,718 Vol.
$42,718 Vol.
Jun 20, 2026
17°C or below
No
18°C
No
19°C
No
20°C
No
21°C
No
22°C
No
23°C
No
24°C
Yes
25°C
No
26°C
No
27°C or higher
No
24°C 100.0%
17°C or below <1%
18°C <1%
19°C <1%
$42,718 Vol.
$42,718 Vol.
Jun 20, 2026
17°C or below
$265 Vol.
No
18°C
$305 Vol.
No
19°C
$2,086 Vol.
No
20°C
$2,786 Vol.
No
21°C
$7,504 Vol.
No
22°C
$6,571 Vol.
No
23°C
$6,141 Vol.
No
24°C
$7,596 Vol.
Yes
25°C
$4,153 Vol.
No
26°C
$3,820 Vol.
No
27°C or higher
$1,491 Vol.
No
This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 20 Jun '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Helsinki Vantaa Airport Station, 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 until the first data point for the following date has been published on the resolution source.
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.Recent forecasts from the Finnish Meteorological Institute and ECMWF ensemble runs indicate a peak near 21°C in Helsinki on June 20, driven by moderate southerly flow and partial cloud cover limiting daytime heating. This places the market-implied probabilities—led by 23°C at 25.5% and 22°C at 18.5%—slightly above the latest model consensus, reflecting trader caution around potential warmer advection or clearer skies that could add 1–2°C. June climatology centers on 19–20°C highs with high day-to-day variability from Baltic Sea influences and frontal passages, keeping outcomes tightly clustered. Key upcoming updates include the next FMI and ECMWF model cycles, which will refine boundary-layer conditions and resolution criteria for the daily maximum.
This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 20 Jun '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Helsinki Vantaa Airport Station, 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 until the first data point for the following date has been published on the resolution source.
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.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Helsinki Vantaa Airport Station, 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 until the first data point for the following date has been published on the resolution source.
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: Jun 18, 2026, 12:16 AM ET
Volume
$42,718End Date
Jun 20, 2026Market Opened
Jun 18, 2026, 12:16 AM ETResolution Source
https://www.wunderground.com/history/daily/fi/vantaa/EFHKResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 20 Jun '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Helsinki Vantaa Airport Station, 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 until the first data point for the following date has been published on the resolution source.
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.Recent forecasts from the Finnish Meteorological Institute and ECMWF ensemble runs indicate a peak near 21°C in Helsinki on June 20, driven by moderate southerly flow and partial cloud cover limiting daytime heating. This places the market-implied probabilities—led by 23°C at 25.5% and 22°C at 18.5%—slightly above the latest model consensus, reflecting trader caution around potential warmer advection or clearer skies that could add 1–2°C. June climatology centers on 19–20°C highs with high day-to-day variability from Baltic Sea influences and frontal passages, keeping outcomes tightly clustered. Key upcoming updates include the next FMI and ECMWF model cycles, which will refine boundary-layer conditions and resolution criteria for the daily maximum.
This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 20 Jun '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Helsinki Vantaa Airport Station, 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 until the first data point for the following date has been published on the resolution source.
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.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Helsinki Vantaa Airport Station, 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 until the first data point for the following date has been published on the resolution source.
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.
Volume
$42,718End Date
Jun 20, 2026Market Opened
Jun 18, 2026, 12:16 AM ETResolution Source
https://www.wunderground.com/history/daily/fi/vantaa/EFHKResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Recent forecasts from the Finnish Meteorological Institute and ECMWF ensemble runs indicate a peak near 21°C in Helsinki on June 20, driven by moderate southerly flow and partial cloud cover limiting daytime heating. This places the market-implied probabilities—led by 23°C at 25.5% and 22°C at 18.5%—slightly above the latest model consensus, reflecting trader caution around potential warmer advection or clearer skies that could add 1–2°C. June climatology centers on 19–20°C highs with high day-to-day variability from Baltic Sea influences and frontal passages, keeping outcomes tightly clustered. Key upcoming updates include the next FMI and ECMWF model cycles, which will refine boundary-layer conditions and resolution criteria for the daily maximum.
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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