Highest temperature in Shanghai on August 1?

Platform comparison

Market context

Shanghai’s highest temperature on 1 August will be set by the day’s peak reading at Pudong International Airport, so the market is really a bet on whether the station gets a modest August heat spike rather than an average summer day. Shanghai’s August climatology is firmly hot: forecasts and historical guides put normal daily highs in the low 30s Celsius, with occasional surges into the mid-to-high 30s and rare extremes near 40°C or above.[1][4][6]

That makes the current 0% crowd-implied price look more like a funding and access story than a weather story. For a small, niche contract, book depth often depends on how easily traders can top up and withdraw: low-friction deposits via Klarna or SEPA can attract casual euros-based flows, while USDC rails usually matter for faster settlement, fewer card declines, and lower cross-border friction. Where on-ramp costs or withdrawal delays are higher, open interest tends to stay thin even when the underlying event is simple to understand, which can leave prices stale until a catalyst appears.

The main near-term catalysts are the actual Shanghai forecast updates, any heat alerts, and whether the city sits under a broader East Asia hot spell or monsoon-influenced cloud and rain band. Reuters reported in 2025 that Shanghai was seeing repeated high-heat episodes and record stretches of hot days, underscoring how quickly late-summer conditions can intensify.[3] Traders should watch the airport-specific hourly forecast into the UTC morning and midday window, because this market settles on the station’s maximum for the day, not the city average or the morning reading.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares Highest temperature in Shanghai on August 1? 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

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).

Are payment details protected?

Yes. Card and bank details are never stored by Polymarket Klarna UK — they pass directly through PCI-DSS compliant payment service providers (Adyen, Stripe). Polymarket Klarna UK retains only transaction IDs and Klarna reference numbers for reconciliation.