Highest temperature in Paris on August 5?

Platform comparison

Market context

Paris is trading as a **sub-0.5% outsider** here, with the crowd-implied probability at **0% YES**, which effectively prices in an outcome below the market’s lowest visible temperature band. The reference point is the Paris-Le Bourget Airport Station’s highest reading on 5 August, and the better comparison is not the city-average headline but the day’s local daytime peak. Current forecasts cluster in the mid-20s Celsius: AccuWeather shows an August high range of **71° to 81°F** for Paris, while several daily outlooks for 5 August sit around **24–29°C** and describe dry, sunny or at least mostly dry conditions[1][2][5][12]. That leaves the favourite side looking like the band covering the forecast peak, with the underdog case requiring an unusually cool cap on the day’s maximum.

On the handicapper’s note, the main value question is whether the market has over-discounted the chance of a warmer spike around early afternoon. The consensus leans to a modestly warm summer day rather than a heatwave, but even a forecast high of 24–29°C is enough to keep the top-of-day temperature well inside typical resolution bands[2][5][11]. Historically, Paris in August is usually warm but not extreme, with average highs in the low-to-mid 20s Celsius and regular variance from clouds, showers and wind[3][11][15]. That pattern favours the side aligned with a normal warm-day maximum, while the only real contrarian angle is a cooler-than-expected ceiling if cloud cover persists longer than forecast.

The main catalyst is the day-of weather evolution rather than any scheduled announcement: cloud cover, shower timing and the exact arrival of the afternoon heating peak will determine the airport station’s maximum. Ouest-France’s morning-to-afternoon forecast for Paris on 5 August points to a clear start, then thickening cloud by late morning and temperatures lifting from about **21°C** to **28°C** later on, while Sortir à Paris also calls for a dry, sunny day near **29°C**[2][5]. For traders, the dependency is simple: if the midday cloud deck breaks sooner, the high can overshoot current consensus; if it holds, the upper band becomes harder to reach.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Who Will Win 2026, which mirrors the Polymarket order book directly.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

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.

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.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

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.

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.