Highest temperature in Paris on July 17?

Platform comparison

Market context

Paris is currently under a light northerly breeze with temperatures holding near 21°C at 7 PM UTC, a sharp deviation from the early July heatwave that pushed France to record highs of 29°C earlier this week[3]. The market’s 0% probability for any significant temperature spike reflects this immediate cooling, as the heat dome that triggered record readings across Europe has dissipated by Friday, aligning with Met Office forecasts for improving conditions[3].

Historical data for mid-July in Paris typically sees highs between 24°C and 28°C, but the 2026 context is defined by the rapid transition from record-breaking heat to comfortable summer norms[1]. The current 92% crowd-implied probability for 26°C as the day’s peak aligns with this post-heatwave baseline, suggesting traders view the earlier 29°C record as an outlier rather than a trend for the 17th[2].

Traders should monitor the final hourly Wunderground update for Paris-Le Bourget, as settlement depends on the single highest reading recorded at that station before the 12:00 UTC deadline[2]. No further weather announcements are expected today, but any sudden shift in cloud cover or wind direction could alter the final temperature, though current conditions point firmly toward the 26°C range[1]. The resolution source remains fixed on Wunderground’s daily history for LFPB, ensuring transparency in the final tally[2].

Sources: 1 · 2 · 3

Methodology

We track Highest temperature in Paris on July 17? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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

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 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.