Highest temperature in Paris on June 30?

Platform comparison

Market context

The underlying event is the highest temperature recorded at Paris-Le Bourget Airport on 30 June 2026, measured in degrees Celsius. This single data point will determine the market resolution, with the settlement window closing at 12:00 UTC on that day. The current crowd-implied probability of 0% for a specific outcome suggests traders view the target range as statistically improbable given typical June conditions.

Historically, Paris June highs average 24°C, with a typical range spanning 17°C to 38°C, though extreme outliers have occurred recently. A major heatwave in western Europe earlier this month pushed Paris temperatures to nearly 41°C, marking France’s hottest day ever and triggering red heat alerts across the continent[3]. While such extremes are rare, the 0% probability may reflect a misunderstanding of how quickly record-breaking temperatures can recur, especially as the 2026 forecast already predicts highs between 79°F and 88°F (26°C–31°C)[5].

Traders should monitor real-time weather updates from Wunderground and any official red heat alerts issued by Meteo France, as these signal immediate temperature spikes. The recent heatwave, which also affected the UK and Spain with record highs, demonstrates how rapidly conditions can shift[3]. Programmatically, one would set up a bot to scrape Wunderground’s hourly data for Paris-Le Bourget, triggering alerts if temperatures exceed 35°C, and cross-reference with Meteo France’s alert system to anticipate market-moving spikes before they are fully priced in.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Paris on June 30? 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

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 Review UK. 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.

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.

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.