Highest temperature in Paris on July 22?

Platform comparison

Market context

The highest temperature recorded at Paris-Le Bourget Airport on 22 July 2026 will be taken from a single daily weather observation, so the practical task is to read the day’s maximum rather than the hourly path. In programme terms, a trader would treat the Wunderground daily history page as the settlement API, poll for the final max after the local day has run through, and map that value to the market’s Celsius bucket.

The current 0% implied probability is not consistent with the live market snapshot, which shows the contest concentrated between **25°C** and **26°C**, each at 50%[1]. That shape matters: for a temperature band market, the live distribution usually reflects how close the forecast is to the boundary between adjacent buckets, not a view that the day will be cold or hot in absolute terms. For power users running bots or conditional orders, the useful read is whether the forecast ensemble, nowcast, and any late-day warming trend push the expected maximum over the nearest threshold.

The main catalysts are short-range forecast updates, cloud cover timing, wind direction, and any local convection that could cap or extend afternoon heating. Because the settlement source is a station-specific daily maximum, the edge often comes from the last few hours before local peak temperature rather than overnight changes, so automated monitoring should key off updated model runs and station observations rather than broad Paris forecasts.

Sources: 1

Methodology

This page reviews Highest temperature in Paris on July 22? 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 Polymarket Review UK, 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 Polymarket Review UK. 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.

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Polymarket Review UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.