Highest temperature in Paris on June 28?

Platform comparison

Market context

The underlying real-world event is the highest temperature recorded at Paris-Le Bourget Airport on 28 June 2026, a date falling within a historic European heatwave that has already pushed Paris to 44°C in recent weeks. On Polymarket, this contract is priced with a 99.9% probability for the 31°C range, while the 32°C range sits below 1%, and the current crowd-implied probability for a "YES" outcome in the highest bracket is effectively 0%, reflecting traders’ belief that the peak heat will have passed before Sunday.

Historical context frames this probability sharply: June 2026 has seen a plateau of extreme heat from Monday through Thursday, with peaks near 40°C, but cooling is expected to begin Friday, 26 June, bringing only gradual relief and a milder weekend with possible thunderstorms. This week’s pattern mirrors the unprecedented May heat streak in Paris, where temperatures stayed above 32°C for six consecutive days, yet the forecast for 28 June specifically cites highs around 35°C with a pronounced risk of thunderstorm showers, suggesting the absolute peak has already occurred earlier in the week.

Traders should watch the confirmation of the cooling trend announced by Meteo France and the timing of thunderstorm development, as these are the primary catalysts that could shift temperatures away from the 31–32°C range. Recent reporting from Sortiraparis confirms the heatwave is easing by Sunday, with the weekend looking milder, while NBC News notes France recorded its hottest June day on Wednesday at 35.7°C south of London, indicating the thermal maximum has likely passed. On-chain mechanics remain straightforward: USDC settles positions on Polygon via conditional tokens, with the settlement window closing at 12:00 UTC on 28 June 2026, and the resolution source is Wunderground’s daily high for Paris-Le Bourget.

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Methodology

This page reviews Highest temperature in Paris on June 28? 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 Scam?, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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 Scam?. 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 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 Scam? trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.