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Highest temperature in Helsinki on May 15?

icon for Highest temperature in Helsinki on May 15?

Highest temperature in Helsinki on May 15?

May 13

May 14

May 15

May 13

May 14

May 15

18°C 36%

17°C 31%

19°C 15%

16°C 9.3%

Polymarket
NEW

18°C 36%

17°C 31%

19°C 15%

16°C 9.3%

Polymarket
NEW

12°C or below

$844 Vol.

1%

13°C

$545 Vol.

1%

14°C

$364 Vol.

2%

15°C

$209 Vol.

2%

16°C

$203 Vol.

9%

17°C

$118 Vol.

31%

18°C

$210 Vol.

36%

19°C

$207 Vol.

15%

20°C

$270 Vol.

7%

21°C

$78 Vol.

1%

22°C or higher

$395 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 15 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.Current short-range forecasts from the Finnish Meteorological Institute (FMI) and ensemble models like ECMWF and GFS project Helsinki's highest temperature on May 15 at around 13-15°C (55-59°F), closely matching mid-May climatological averages of 14°C with typical ranges of 11-16°C based on decades of observations. Recent FMI data indicates steady spring warming over the past week, with no anomalous cold fronts or heat events disrupting the pattern—southern Finland has seen consistent mild conditions influenced by Baltic Sea moderation. Inherent model uncertainty persists due to potential cloud cover variations or subtle steering winds, potentially shifting peaks by 2-4°C. Watch FMI's twice-daily updates and tomorrow's 12Z model runs for refinements 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 15 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.
Volume
$3,416
End Date
May 15, 2026
Market Opened
May 13, 2026, 1:12 AM ET

Resolution Source

https://www.wunderground.com/history/daily/fi/vantaa/EFHK

Resolver

0x69c47De9D...
This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 15 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.
This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 15 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.Current short-range forecasts from the Finnish Meteorological Institute (FMI) and ensemble models like ECMWF and GFS project Helsinki's highest temperature on May 15 at around 13-15°C (55-59°F), closely matching mid-May climatological averages of 14°C with typical ranges of 11-16°C based on decades of observations. Recent FMI data indicates steady spring warming over the past week, with no anomalous cold fronts or heat events disrupting the pattern—southern Finland has seen consistent mild conditions influenced by Baltic Sea moderation. Inherent model uncertainty persists due to potential cloud cover variations or subtle steering winds, potentially shifting peaks by 2-4°C. Watch FMI's twice-daily updates and tomorrow's 12Z model runs for refinements 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 15 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.
Volume
$3,416
End Date
May 15, 2026
Market Opened
May 13, 2026, 1:12 AM ET

Resolution Source

https://www.wunderground.com/history/daily/fi/vantaa/EFHK

Resolver

0x69c47De9D...
This market will resolve to the temperature range that contains the highest temperature recorded at the Helsinki Vantaa Airport Station in degrees Celsius on 15 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.

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Frequently Asked Questions

"Highest temperature in Helsinki on May 15?" is a prediction market on Polymarket with 11 possible outcomes where traders buy and sell shares based on what they believe will happen. The current leading outcome is "18°C" at 36%, followed by "17°C" at 31%. Prices reflect real-time crowd-sourced probabilities. For example, a share priced at 36¢ implies that the market collectively assigns a 36% chance to that outcome. These odds shift continuously as traders react to new developments and information. Shares in the correct outcome are redeemable for $1 each upon market resolution.

"Highest temperature in Helsinki on May 15?" is a newly created market on Polymarket, launched on May 13, 2026. As an early market, this is your opportunity to be among the first traders to set the odds and establish the market's initial price signals. You can also bookmark this page to track volume and trading activity as the market gains traction over time.

To trade on "Highest temperature in Helsinki on May 15?," browse the 11 available outcomes listed on this page. Each outcome displays a current price representing the market's implied probability. To take a position, select the outcome you believe is most likely, choose "Yes" to trade in favor of it or "No" to trade against it, enter your amount, and click "Trade." If your chosen outcome is correct when the market resolves, your "Yes" shares pay out $1 each. If it's incorrect, they pay out $0. You can also sell your shares at any time before resolution if you want to lock in a profit or cut a loss.

The current frontrunner for "Highest temperature in Helsinki on May 15?" is "18°C" at 36%, meaning the market assigns a 36% chance to that outcome. The next closest outcome is "17°C" at 31%. These odds update in real-time as traders buy and sell shares, so they reflect the latest collective view of what's most likely to happen. Check back frequently or bookmark this page to follow how the odds shift as new information emerges.

The resolution rules for "Highest temperature in Helsinki on May 15?" define exactly what needs to happen for each outcome to be declared a winner — including the official data sources used to determine the result. You can review the complete resolution criteria in the "Rules" section on this page above the comments. We recommend reading the rules carefully before trading, as they specify the precise conditions, edge cases, and sources that govern how this market is settled.