Highest temperature in Paris on June 23?

Platform comparison

Active sub-markets

Market context

On 23 June 2026, the Paris-Le Bourget Airport Station will record its peak temperature, a real-world event that directly determines the outcome of this prediction market. The crowd currently assigns a 0% implied probability to the “YES” side, reflecting a consensus that the temperature will not reach the threshold in question. This stance aligns with historical patterns: June highs in Paris typically range between 69°F and 74°F (20.5°C to 23.3°C), rarely exceeding 84°F (28.9°C) [1]. Even during extreme heatwaves, such as in July 2019 when Paris hit 42.4°C, the event occurred in late July, not mid-June [2].

Traders should monitor upcoming meteorological bulletins and any declared heatwave alerts from Météo-France, as these often precede sharp temperature spikes. Recent coverage by Le Monde notes that continental France experienced significant heatwaves in June and July 2022, with multiple maximum temperature records broken [5]. While no specific forecast for 23 June 2026 is yet available, the value spot may lie in contrarian positions if early indicators suggest an unusually warm start to the month. The settlement window ends at 12:00 UTC on 23 June 2026, so timing is critical for any late adjustments based on real-time data from Wunderground [4].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Paris on June 23? on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

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?

On Who Will Win 2026, which mirrors the Polymarket order book at 0% fees. 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.

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?

Not under $1,500 of lifetime trading volume. Above that threshold, Who Will Win 2026 triggers a quick verification flow that finishes in minutes.

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.