Highest temperature in London on August 8?

Platform comparison

Market context

A **warm late-summer spell** would be enough to settle this market well above the lowest bands, but the current crowd pricing at 0% suggests traders are either waiting for the event itself or discounting the probability of an outlying reading at London City Airport. Forecasts for London on 8 August pointed to highs around **28°C** and clear to partly cloudy conditions, while AccuWeather’s daily outlook also showed temperatures in the low 80s Fahrenheit, consistent with a mid-to-high 20s Celsius outcome.[3][13] The market resolves from Weather Underground’s **Daily Observations** table, not the summary high/low box, so the exact station reading matters more than citywide forecast headlines.

Comparable August London markets tend to cluster around the mid-20s Celsius unless there is a strong heatwave signal, because London City Airport can run warmer than some other inner-London reference points on sunny, low-wind days. UKHSA had an active heat-health alert for London from 8 August, which is a useful context marker but not a direct settlement input.[8] The settlement window also means traders are effectively betting on the single highest observed temperature reported before noon UTC, so even a brief early spike can matter more than the full-day mean.[16]

For book depth, the practical catalyst is not the weather headline alone but whether traders can move fiat in fast enough to react to the final forecast updates. In a payment-led venue, deposits that clear quickly through card rails or local bank transfer tend to create shallower spreads, while friction from withdrawals or slow top-ups can thin liquidity until later in the session; USDC rails, where available, can also compress funding delays. The main things to watch are late Met Office and airport-adjacent forecast updates, any shift in cloud cover or wind that changes the daytime peak, and whether London stays under the same broad heat-alert regime into the morning observation period.[8][16]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares Highest temperature in London on August 8? 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).