Highest temperature in Helsinki on July 4?

Platform comparison

Market context

The underlying event is the forecasted peak temperature at Helsinki-Vantaa Airport on 4 July 2026, which the Finnish Meteorological Institute predicts to reach 19°C with minimal model uncertainty[4]. This specific forecast contradicts the current crowd-implied probability of 0% for the market, suggesting a significant mispricing where traders may be overlooking the official meteorological guidance.

Historically, July is the hottest month at this station, with an average high of 21°C (71°F), and recent years have seen record-breaking heatwaves pushing temperatures above 30°C[2][6]. While the current market assigns near-zero probability to the 19°C outcome, comparable data from previous July 4ths shows temperatures frequently landing in the 18°C to 20°C range, making the 0% figure appear statistically anomalous against established climate norms[1].

Traders should monitor the 72-hour official forecast updates and any sudden shifts in wind direction, as the current NE wind at 12mph may limit daytime heating[5]. The primary catalyst is the release of the final Wunderground data point at 12:00 UTC on 4 July, which will definitively resolve the market[1]. Any deviation from the 19°C forecast in the immediate hours before settlement would signal a critical change in the probability landscape, requiring immediate position adjustments.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Sports-specific comparison page for Highest temperature in Helsinki on July 4?. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi or Manifold.

Resolution & payout

Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.

FAQ

When do sports markets resolve?

Typically within hours of the official final whistle. Polymarket uses UMA Optimistic Oracle with source URLs pointing at official league data feeds — e.g. the Premier League for EPL markets, UEFA for Champions League, FIFA for World Cup.

Can I bet on individual matches?

Yes, Polymarket lists every major Premier League / Champions League / World Cup match as its own market. Liquidity varies — top matches like El Clásico or a semi-final often have six-figure pools, lower-league games closer to three-figure.

What are live sports odds on Polymarket?

Some top-tier matches stay open during play — you can trade the half-time probability in the 70th minute. Polymarket mid-prices update second-by-second; any frontend mirroring the order book shows the same movement.

Which sports markets are available?

Football (soccer) dominates — Champions League, World Cup, Premier League, La Liga, Bundesliga — followed by NFL, NBA, tennis Grand Slams, Formula 1, boxing/MMA. Resolution via official league source confirmation.

Can I import form data and lineups?

This page shows the live Polymarket quote as an implied probability. Form data and lineups must be researched separately via sports data providers (e.g. Soccerway, ESPN, FBref) — we surface the market probability, not the sport analysis.