Highest temperature in Wellington on August 11?

Platform comparison

Market context

Wellington’s highest temperature on 11 August is likely to sit in the low-teens Celsius, with major weather services clustering the day around about 11°C to 13°C and overnight lows near 8°C to 10°C. The market’s current 0% YES implies the crowd is not pricing any of the listed temperature bands yet, but for a programmatic workflow the useful signal is the narrow forecast spread: when ensemble guidance and point forecasts stay compressed, the winning band usually follows the daily maximum rather than any brief midday spike. Forecast pages from AccuWeather and the World Weather Information Service both point to cool, showery winter conditions in Wellington, New Zealand, which is consistent with a modest ceiling on the day’s top reading.[3][2][6][12]

For comparable cases, Wellington in August is typically stable rather than volatile: historical summaries put average highs around 12°C to 13°C, with daily highs rarely straying far from that band. That matters for bot-driven trading because a late move from 12°C into 13°C usually depends on a small revision in the forecast, not a regime change, so conditional orders keyed to forecast updates can be more efficient than chasing the tape. Current market text also indicates that the resolution will use Weather Underground’s Daily Observations for Wellington Intl Airport Station, so a trader parsing the feed should watch the observed maximum rather than the app’s summary high/low card if they diverge.[11][12][16]

The main catalysts are forecast refreshes and any change in wind, cloud, or rain timing that alters the daytime cap before the local afternoon maximum. For an automated setup, the practical checks are the latest model run, the station observation history, and the first post-event observation published after the settlement window, because the market rules allow revisions within the window until the next day’s datapoint appears.[12] Weather Underground’s Wellington forecast page and the official Wellington forecast sources are the relevant operational inputs here, while broader regional outlooks remain secondary unless they materially shift the expected maximum by a full degree or more.[16][2][5]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

UK Frequently Asked Questions

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Polymarket Bot UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

Is Polymarket legal in the UK?

Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

How do I deposit on Polymarket from the UK?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.