Highest temperature in Paris on July 20?

Platform comparison

Market context

Paris-Le Bourget Airport is forecast to record a peak temperature between 36°C and 39°C on 20 July 2026, with some models suggesting a potential spike to 40°C during an intense, multi-day heatwave. This extreme reading contrasts sharply with the current crowd-implied probability of 0% for the market’s leading outcome, which appears to be misaligned with the prevailing meteorological consensus. Historical data for mid-July in Paris shows average highs of 25–27°C, but canicules frequently push temperatures into the 35–40°C range, making the current pricing an outlier against established seasonal volatility [2][3].

Traders should monitor the arrival of cooler Atlantic air, which forecasters predict could reach Paris by the end of the week, potentially dropping temperatures below 30°C and altering the settlement outcome [3]. The resolution depends entirely on the highest temperature recorded at Paris-Le Bourget Airport via Wunderground, meaning any deviation in the forecasted heatwave duration or intensity will directly impact the book depth. Recent weather updates confirm the heatwave is expected to last several days, reinforcing the likelihood of a high-temperature settlement unless the Atlantic relief arrives earlier than anticipated [3].

The market’s traction is driven by funding flows through Klarna and SEPA on-ramps, where deposit friction and fee structures influence how quickly traders can adjust positions as the heatwave forecast evolves. As withdrawal rails like USDC become more accessible, liquidity is expected to deepen, allowing the 0% probability to correct toward the 100% consensus for the 24°C frontrunner if the heatwave persists [1]. The interplay between real-time weather data and payment infrastructure efficiency will determine whether the market resolves accurately or remains skewed by initial pricing errors.

Sources: 1 · 2 · 3

Methodology

This page compares Highest temperature in Paris on July 20? with a focus on payment rails and deposit friction. Polymarket accepts USDC on Polygon only; Kalshi only ACH/Plaid (US only); Betfair card/SEPA in EU/UK; Manifold no deposit. Polymarket Klarna UK additionally offers Klarna and SOFORT as fiat on-ramps to USDC. Live odds reflect the Polymarket order book.

Resolution & payout

Settlement path determines payout latency. Polymarket settles on-chain (USDC, minutes). Broker frontends like Polymarket Klarna UK add Klarna/SOFORT as fiat withdrawal options with T+1 processing. Kalshi: USD via ACH (T+1 to T+3). Betfair: local currency via card/SEPA (T+1 to T+5).

FAQ

What does SOFORT cost as a deposit method?

Polymarket Klarna UK charges no fees for SOFORT. The only cost is the internal FX spread (typically <1%) on EUR→USDC conversion. SOFORT itself has no end-user fees — the platform absorbs acquirer costs.

How fast is SEPA deposit?

SEPA Instant: under 10 seconds. SEPA Standard: 1-2 business days. Both accepted fee-free; the internal USDC conversion runs automatically once EUR lands in the platform account.

Can I deposit with a credit card?

Yes, Visa and Mastercard. Credit card deposits carry a ~2.5% acquirer surcharge (standard for card payments). Apple Pay and Google Pay run on the same card rails — same surcharge.

What's the minimum deposit?

10 EUR / 10 USD equivalent. No upper limit, but deposits over $1,500 lifetime volume trigger a quick KYC flow (typically 5-10 minutes).

How do withdrawals work?

Identical methods in reverse. SEPA withdrawal: T+1 (standard) or under 10 seconds (SEPA Instant). Klarna withdrawals process via bank-account refund. USDC withdrawal to external wallet: Polygon gas cost (typically $0.01).