Highest temperature in Helsinki on July 23?: how this market works

What you need to know

This market is asking: how hot will Helsinki get on July 23, 2026? Specifically, it wants to know the single highest temperature reached that day, measured in whole degrees Celsius at Helsinki's main airport weather station. A result of 20°C means the day peaked around 68°F, a mild summer day. 19°C is slightly cooler, around 66°F. 18°C is closer to a cool, grey day at about 64°F. The market is essentially a temperature forecast for one specific day, more than a year from now. The market settles based on the peak temperature recorded on July 23, 2026, at Helsinki Vantaa Airport, as reported by Weather Underground. The temperature is rounded to the nearest whole degree Celsius. The result is locked in once the first data point for July 24 appears on that site. One thing to note: if Weather Underground revises the temperature during the day of July 23, those revisions count, but any corrections made after July 24's data appears do not count. There is no recent news relevant to this market. That makes sense: we are over a year away from the date in question, and weather forecasts beyond about ten days are not reliable. The kind of development that would actually matter here is a detailed long-range seasonal forecast for Finland in summer 2026, but those do not exist yet with meaningful precision. Predicting a single day's peak temperature more than a year in advance is genuinely very hard. Weather is chaotic: even professional forecasters cannot reliably predict a specific date's high temperature beyond roughly two weeks. The market spreads its odds fairly evenly across 18, 19, and 20°C, which reflects that honest uncertainty. Helsinki in late July averages highs around 22°C, so all three options sit slightly below the historical average, suggesting the market also leaves room for warmer or cooler outcomes outside these three choices.

The odds right now

• 19°C36%
• 20°C31%
• 18°C24%
• 17°C5%
• 21°C4%
• 22°C1%
• 16°C1%
• 23°C1%
• 15°C or below1%
• 24°C0%
• 25°C or higher0%

Price history

How this resolves

Resolves July 23, 2026

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 Jul '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. Read the full resolution rules on the live market page.

Related

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