Highest temperature in London on August 19?

Platform comparison

Market context

London's highest temperature on 19 August 2026 will be recorded at City Airport and measured against historical August heat patterns. The market currently shows 0% probability across all temperature bands, reflecting either early-stage illiquidity or consensus that extreme heat is unlikely for that specific date. August in London typically peaks between 20–25°C, with temperatures exceeding 30°C occurring roughly once per decade; the record high for any August day stands at 36.4°C, set in 2022. Settlement hinges on Weather Underground's Daily Observations table rather than summary figures, a distinction that matters when automated systems report differently.

Traders monitoring this market should track the Met Office's seasonal forecasts and Atlantic weather pattern developments through spring and summer 2026. La Niña or La Niña-neutral conditions, if they persist into August, typically suppress extreme heat across the UK. The current zero-probability reading suggests either sparse initial funding or genuine market consensus that the range bands are set too high. Book depth will depend on deposit flows; traders using Klarna's SEPA rails or direct USDC settlement may find tighter spreads as the market approaches August, since payment friction directly correlates with participation levels on weather markets where individual stakes remain modest.

Methodology

This page compares Highest temperature in London on August 19? 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

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.

Which payment methods are supported?

Klarna (Pay Now / Pay Later), SOFORT, SEPA bank transfer, credit card (Visa/Mastercard), Apple Pay, Google Pay, and direct USDC deposit on Polygon. Availability depends on your jurisdiction.

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).