Latest ensemble forecasts from the Finnish Meteorological Institute and European models indicate a daytime maximum near 22°C in Helsinki on June 18, driving the market's strong clustering around the 21–23°C outcomes that together exceed 80% implied probability. These projections reflect typical early-summer Baltic Sea moderation, with light winds and partial cloud cover limiting stronger diurnal heating while preventing significant cooling. Recent model runs show tight agreement on peak values without major shifts from prior days, though any afternoon clearing or delayed sea breeze could nudge readings slightly higher. Official observations from Helsinki-Vantaa or city stations will determine the final recorded high for market 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 June 18?
Highest temperature in Helsinki on June 18?
22°C 100.0%
15°C or below <1%
16°C <1%
17°C <1%
$72,487 Vol.
$72,487 Vol.
Jun 18, 2026
15°C or below
No
16°C
No
17°C
No
18°C
No
19°C
No
20°C
No
21°C
No
22°C
Yes
23°C
No
24°C
No
25°C or higher
No
22°C 100.0%
15°C or below <1%
16°C <1%
17°C <1%
$72,487 Vol.
$72,487 Vol.
Jun 18, 2026
15°C or below
$2,334 Vol.
No
16°C
$3,107 Vol.
No
17°C
$5,454 Vol.
No
18°C
$5,708 Vol.
No
19°C
$10,272 Vol.
No
20°C
$8,474 Vol.
No
21°C
$9,143 Vol.
No
22°C
$10,822 Vol.
Yes
23°C
$7,236 Vol.
No
24°C
$4,577 Vol.
No
25°C or higher
$5,358 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 18 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.Latest ensemble forecasts from the Finnish Meteorological Institute and European models indicate a daytime maximum near 22°C in Helsinki on June 18, driving the market's strong clustering around the 21–23°C outcomes that together exceed 80% implied probability. These projections reflect typical early-summer Baltic Sea moderation, with light winds and partial cloud cover limiting stronger diurnal heating while preventing significant cooling. Recent model runs show tight agreement on peak values without major shifts from prior days, though any afternoon clearing or delayed sea breeze could nudge readings slightly higher. Official observations from Helsinki-Vantaa or city stations will determine the final recorded high for market 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 18 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 16, 2026, 1:20 AM ET
Volume
$72,487End Date
Jun 18, 2026Market Opened
Jun 16, 2026, 1:20 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 18 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.Latest ensemble forecasts from the Finnish Meteorological Institute and European models indicate a daytime maximum near 22°C in Helsinki on June 18, driving the market's strong clustering around the 21–23°C outcomes that together exceed 80% implied probability. These projections reflect typical early-summer Baltic Sea moderation, with light winds and partial cloud cover limiting stronger diurnal heating while preventing significant cooling. Recent model runs show tight agreement on peak values without major shifts from prior days, though any afternoon clearing or delayed sea breeze could nudge readings slightly higher. Official observations from Helsinki-Vantaa or city stations will determine the final recorded high for market 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 18 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
$72,487End Date
Jun 18, 2026Market Opened
Jun 16, 2026, 1:20 AM ETResolution Source
https://www.wunderground.com/history/daily/fi/vantaa/EFHKResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Latest ensemble forecasts from the Finnish Meteorological Institute and European models indicate a daytime maximum near 22°C in Helsinki on June 18, driving the market's strong clustering around the 21–23°C outcomes that together exceed 80% implied probability. These projections reflect typical early-summer Baltic Sea moderation, with light winds and partial cloud cover limiting stronger diurnal heating while preventing significant cooling. Recent model runs show tight agreement on peak values without major shifts from prior days, though any afternoon clearing or delayed sea breeze could nudge readings slightly higher. Official observations from Helsinki-Vantaa or city stations will determine the final recorded high for market 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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