Highest temperature in Paris on June 22?

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Market context

Paris-Le Bourget Airport’s highest temperature is being set by the day’s top reading on 22 June, and the market is essentially a call on whether the afternoon heat peaks in the **37–38°C** band or slips lower. Polymarket’s live pricing has been concentrated in that range, with 37°C and 38°C carrying most of the implied probability, so the current 0% YES reading looks detached from the visible distribution rather than from the weather itself.[1]

For context, Paris in June usually sees average daily highs in the low to mid-20s °C, but the city is also capable of fast heat spikes when a warm plume arrives, with recent reporting in France highlighting conditions hot enough to push temperatures into the high-30s °C nationally and trigger record-risk language from forecasters.[2][4] Historically, Paris has had temperatures well above 35°C in major heat events, so a market that keys off the single highest airport reading can move sharply on one hot afternoon rather than across the whole day.[3][7]

A programmatic trader would watch the intra-day forecast path, the timing of the maximum, and any updates from Météo-France or airport-specific observations, because the settlement source is Wunderground’s Paris-Le Bourget station page rather than a citywide average.[1] In practice, the useful signals are forecast revisions, cloud cover changes, wind shifts, and whether the hottest hour lands before or after the settlement cut-off; once the realised peak starts printing near 37°C, the remaining upside is often mostly a question of whether 38°C or higher is reached.[1][4]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

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

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?

On Polymarket Bot UK, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket Bot UK is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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.

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.