Highest temperature in Shanghai on August 21?

Platform comparison

Market context

Shanghai's highest temperature on 21 August 2026 will be recorded at Pudong International Airport Station and measured against historical August benchmarks. The settlement hinges on Weather Underground's Daily Observations table rather than summary figures, a distinction that matters when intraday peaks diverge from reported highs. Current crowd probability sits at 0%, suggesting either extreme confidence in a specific temperature band or minimal trading activity establishing a baseline.

August in Shanghai typically peaks between 32–35°C, with occasional readings above 36°C during heat waves. The 0% probability reading reflects either that traders have already concentrated liquidity in adjacent temperature brackets or that deposit friction on the platform has suppressed early positioning. Historical data from the China Meteorological Administration shows Shanghai recorded 40.9°C in July 2022 and sustained 35°C+ readings throughout August in recent years, making mid-to-high 30s the statistical centre of gravity. Comparable August markets on prediction platforms have drawn meaningful depth once traders clear payment onboarding—SEPA transfers and Klarna's deferred settlement options typically unlock secondary liquidity within 48 hours of market launch.

Traders should monitor the East Asian monsoon forecast and any tropical cyclone activity tracking toward the Yangtze River Delta in late August 2026. The China Meteorological Administration publishes 10-day outlooks fortnightly; the next relevant update will arrive in early August. Deposit rails matter here: traders using Klarna's pay-later option gain exposure without immediate capital outlay, whilst USDC holders can enter positions instantly. Book depth typically accelerates 72 hours before settlement as weather models converge and payment confirmation clears.

Methodology

This page compares Highest temperature in Shanghai on August 21? 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).

UK Frequently Asked Questions

How does Klarna deposit work on Polymarket Klarna UK?

You enter the deposit amount in EUR/GBP, choose Klarna as the method, run through Klarna's standard authentication (Pay Later or Direct Bank Transfer), and Polymarket Klarna UK converts internally to USDC for the Polymarket order book. Processing: typically under 30 minutes.

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.

Can UK traders use Klarna to deposit on Polymarket?

Polymarket does not natively accept Klarna. To fund a Polymarket account from the UK, you must first purchase USDC via a crypto exchange (Coinbase UK, Kraken) or Revolut, then transfer to a Polygon-compatible wallet. Some third-party on-ramps (MoonPay, Transak) accept UK debit cards and may support Klarna buy-now-pay-later for crypto purchases.

What payment methods can UK users use for Polymarket?

UK traders typically use: (1) Coinbase UK or Kraken — buy USDC with GBP debit card or bank transfer; (2) Revolut — buy crypto and send to wallet; (3) MoonPay or Transak — Visa/Mastercard UK debit card directly to USDC on Polygon. Standard GBP-to-USDC conversion fees range from 0.5–2.5%.

How long do Polymarket withdrawals take for UK users?

Polymarket withdrawals to your Polygon wallet are instant (on-chain). Converting USDC back to GBP via Coinbase UK or Kraken typically takes 1–3 business days for bank transfer, or near-instant for Revolut. Polygon gas fees are minimal (<$0.01 per transaction).