Recent short-range forecasts from agencies including the Met Office and BBC place Helsinki's June 23 maximum near 20 °C under partly cloudy skies and light northwesterly flow. This consensus centers trader probabilities on 20–22 °C outcomes, with the slight edge to 21 °C reflecting model spread in boundary-layer heating and possible brief afternoon clearing. Key differentiating factors include the precise arrival timing of a weak Atlantic trough, which could cap insolation and limit the peak by 1–2 °C, versus drier, more stable high pressure that would allow greater surface warming. Historical June climatology shows typical maxima of 17–19 °C, so current guidance indicates modestly above-average conditions driven by a warmer-than-normal maritime air mass. Updated model runs and observational data over the next 48 hours will refine the exact threshold 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 23?
Highest temperature in Helsinki on June 23?
20°C 100.0%
14°C or below <1%
15°C <1%
16°C <1%
$50,705 Vol.
$50,705 Vol.
Jun 23, 2026
14°C or below
No
15°C
No
16°C
No
17°C
No
18°C
No
19°C
No
20°C
Yes
21°C
No
22°C
No
23°C
No
24°C or higher
No
20°C 100.0%
14°C or below <1%
15°C <1%
16°C <1%
$50,705 Vol.
$50,705 Vol.
Jun 23, 2026
14°C or below
$151 Vol.
No
15°C
$148 Vol.
No
16°C
$94 Vol.
No
17°C
$10,146 Vol.
No
18°C
$6,297 Vol.
No
19°C
$6,503 Vol.
No
20°C
$9,740 Vol.
Yes
21°C
$8,486 Vol.
No
22°C
$4,396 Vol.
No
23°C
$3,462 Vol.
No
24°C or higher
$1,282 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 23 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 short-range forecasts from agencies including the Met Office and BBC place Helsinki's June 23 maximum near 20 °C under partly cloudy skies and light northwesterly flow. This consensus centers trader probabilities on 20–22 °C outcomes, with the slight edge to 21 °C reflecting model spread in boundary-layer heating and possible brief afternoon clearing. Key differentiating factors include the precise arrival timing of a weak Atlantic trough, which could cap insolation and limit the peak by 1–2 °C, versus drier, more stable high pressure that would allow greater surface warming. Historical June climatology shows typical maxima of 17–19 °C, so current guidance indicates modestly above-average conditions driven by a warmer-than-normal maritime air mass. Updated model runs and observational data over the next 48 hours will refine the exact threshold 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 23 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 21, 2026, 12:15 AM ET
Volume
$50,705End Date
Jun 23, 2026Market Opened
Jun 21, 2026, 12:15 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 23 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 short-range forecasts from agencies including the Met Office and BBC place Helsinki's June 23 maximum near 20 °C under partly cloudy skies and light northwesterly flow. This consensus centers trader probabilities on 20–22 °C outcomes, with the slight edge to 21 °C reflecting model spread in boundary-layer heating and possible brief afternoon clearing. Key differentiating factors include the precise arrival timing of a weak Atlantic trough, which could cap insolation and limit the peak by 1–2 °C, versus drier, more stable high pressure that would allow greater surface warming. Historical June climatology shows typical maxima of 17–19 °C, so current guidance indicates modestly above-average conditions driven by a warmer-than-normal maritime air mass. Updated model runs and observational data over the next 48 hours will refine the exact threshold 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 23 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
$50,705End Date
Jun 23, 2026Market Opened
Jun 21, 2026, 12:15 AM ETResolution Source
https://www.wunderground.com/history/daily/fi/vantaa/EFHKResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Recent short-range forecasts from agencies including the Met Office and BBC place Helsinki's June 23 maximum near 20 °C under partly cloudy skies and light northwesterly flow. This consensus centers trader probabilities on 20–22 °C outcomes, with the slight edge to 21 °C reflecting model spread in boundary-layer heating and possible brief afternoon clearing. Key differentiating factors include the precise arrival timing of a weak Atlantic trough, which could cap insolation and limit the peak by 1–2 °C, versus drier, more stable high pressure that would allow greater surface warming. Historical June climatology shows typical maxima of 17–19 °C, so current guidance indicates modestly above-average conditions driven by a warmer-than-normal maritime air mass. Updated model runs and observational data over the next 48 hours will refine the exact threshold 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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