Highest temperature in Paris on July 2?

Platform comparison

Market context

Paris is currently bracing for its second exceptional heatwave of 2026, with temperatures forecast to climb sharply from Wednesday, June 17, through the weekend. Météo-France has projected highs of up to 37°C (99°F) in the Paris region, with peaks of 40°C anticipated on Sunday, coinciding with the summer solstice. The national meteorological service has placed 52 departments under yellow heatwave alert, with an orange alert likely to be issued for the Paris region by midday Thursday. This immediate surge in thermal pressure, driven by a warm air influx from North Africa, explains the current crowd-implied probability of 0% for the lower temperature range, as the market anticipates conditions well above seasonal norms.

Historical data frames this current probability against a backdrop of extreme volatility; while long-term July averages for Paris suggest a daytime maximum of 24°C, the capital has recorded temperatures above 40°C three times, including a record 42.6°C on July 25, 2019. The current heatwave is described as "exceptional" and is expected to persist with tropical nights where temperatures do not drop below 25°C, a pattern that starkly contrasts with the typical 14°C night lows. Traders should watch for the official issuance of the orange alert and any sudden thunderstorm activity, which Météo-France notes might limit the temperature rise by the end of the week, though the end date of this heatwave remains unclear. Recent reporting from Le Monde confirms that weather maps across France are turning a deep crimson red, indicating the severity of the approaching thermal event.

The primary catalysts for price movement include the confirmation of the 40°C peak forecast for Sunday and the potential for an orange alert to be expanded to the Paris region. Forecasters warn of "tropical nights" with temperatures staying above 20°C after dark, which will sustain the heat accumulation necessary to breach the 37°C threshold. While thunderstorms might offer a relative drop in temperatures during the week of June 22, the prevailing sunshine and warm air influx suggest the heat will persist at least until the week's end. Traders must monitor real-time updates from Météo-France for any deviations from the 39°C to 40°C forecast, as these specific degrees will determine the final resolution range for the market.

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 Prediction Today, 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 Prediction Today. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Prediction Today 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.