Highest temperature in Helsinki on July 13?

Platform comparison

Market context

The market seeks the highest temperature recorded at Helsinki Vantaa Airport on 13 July 2026, with settlement determined by historical weather data from Wunderground. The crowd currently implies 0% probability across all temperature ranges, suggesting either incomplete market formation or uncertainty about which bracket will resolve.

Helsinki's July climate typically ranges between 15–23°C, with occasional peaks above 25°C during heat waves. Historical records show that temperatures exceeding 28°C on any single July day occur roughly once per decade in the region, whilst readings above 30°C are exceptionally rare. The 2019 European heat wave saw Helsinki reach 33.2°C in late July, demonstrating that extreme outliers do materialise, though infrequently. The 0% crowd probability across all ranges suggests traders may be awaiting clearer seasonal forecasts or treating this as a placeholder market pending activation.

The key catalyst will be medium-range weather models released in early July 2026, typically 10–14 days before the settlement date. Scandinavian summer patterns remain sensitive to Atlantic pressure systems and Arctic air masses; a ridge of high pressure over northern Europe would favour above-average temperatures, whilst a trough would suppress them. Finnish Meteorological Institute forecasts and European Centre for Medium-Range Weather Forecasts (ECMWF) data will provide the most reliable guidance. Traders should monitor whether any heat advisory warnings emerge for the Nordic region in the days immediately preceding 13 July, as such alerts historically correlate with temperature ranges exceeding 25°C.

Methodology

This page reviews Highest temperature in Helsinki on July 13? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Who Will Win, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Who Will Win. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Who Will Win trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.