Highest temperature in Helsinki on July 13?

Platform comparison

Market context

The settlement hinges on the highest temperature recorded at Helsinki Vantaa Airport on 13 July 2026, measured in Celsius. The crowd currently assigns zero probability to any outcome, suggesting either insufficient liquidity or genuine uncertainty about which temperature band will materialise on that specific date.

Helsinki's July climate sits at the threshold of Scandinavian summer variability. Historical data from Vantaa shows July highs typically range between 20–25°C, though the station has recorded peaks above 28°C during warm spells. The 0% implied probability reflects the market's nascent state rather than a consensus view that no temperature will be recorded; traders should examine comparable July days from recent years to establish reasonable range expectations. The Finnish Meteorological Institute's long-term records indicate that temperatures exceeding 25°C occur in roughly 40–50% of July days at the airport, providing a baseline for evaluating which brackets hold genuine value.

The settlement date falls mid-summer, when Nordic weather patterns are most influenced by high-pressure systems tracking from continental Europe. Traders monitoring European weather forecasts in early July 2026 will gain clarity on whether Atlantic systems or warmer continental air masses dominate the region. The Wunderground historical database provides the sole resolution source, making data accessibility straightforward once the day concludes. Early-market positioning should reflect the wide range of plausible outcomes rather than the current zero-probability state, which likely indicates thin initial trading rather than informed consensus.

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 2026, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

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 2026. 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 does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Who Will Win 2026 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.