Highest temperature in Sao Paulo on July 9?

Platform comparison

Market context

The underlying real-world event is the daily maximum temperature recorded at São Paulo-Guarulhos International Airport on 9 July 2026, with the market currently assigning a 0% probability to any outcome above 23°C. Historical data frames this near-zero probability as a logical reflection of São Paulo’s seasonal norms: July is the coldest month of the year, with an average high of just 72°F (22.2°C) and an average low of 56°F (13.3°C)[3]. While July 2023 broke records as the hottest July in 174 years with an average of 16.92°C, that figure remains well below the 23°C threshold, and recent heatwaves in Brazil have primarily impacted Rio de Janeiro rather than São Paulo’s inland airport station[2][4].

Traders should monitor Wunderground’s official daily report for 9 July 2026, which will serve as the definitive resolution source, and watch for any unexpected meteorological anomalies such as sudden cold fronts or unseasonal heat spikes that could push temperatures above 22°C[1]. Recent weather data from late June to early July 2026 shows a peak of 80.6°F (27°C) on 2026-07-08, suggesting marginal volatility but no sustained trend toward 23°C[5]. No major climate announcements or scheduled weather events are expected to alter the baseline, making the 22°C outcome the overwhelming frontrunner at 98% probability, with 23°C holding only a 1% chance[1]. The settlement window closes at 12:00 UTC on 9 July 2026, locking in the final recorded high for the day.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Sports-specific comparison page for Highest temperature in Sao Paulo on July 9?. 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.

What's the difference between match odds and outright odds?

Match odds cover a single game ("Bayern beats BVB"). Outright odds are long-term aggregates ("Bayern wins the league"). Outright markets have deeper liquidity; match markets have faster resolution.