Highest temperature in Wellington on August 8?

Platform comparison

Market context

Wellington’s highest temperature on 8 August is set to be judged against the Weather Underground daily observations for Wellington Intl Airport, and the broad forecast range points to a cool winter day rather than a heat event. AccuWeather’s same-day outlook has a high of about 57°F, while WeatherWatch and the Met Office both sit closer to 12–13°C, with cloud, wind and periods of rain limiting upside; that aligns with the market’s **0% yes** pricing, which implies traders see no realistic route to an unusually warm reading under the contract’s temperature bands.[2][5][13]

Historically, Wellington’s August temperatures are tightly clustered and rarely stray far from the low teens Celsius. WeatherSpark describes August daily highs around 54°F, rarely below 49°F or above 59°F, which makes a result in the upper end of the listed bands plausible but still weather-dependent rather than routine.[16] In practical terms, this contract looks far closer to a weather-range bet than a binary shock event: the crowd price is far below the forecast-derived “high teens” only because the market is asking for the specific temperature band that contains the station’s recorded maximum, not whether the day is merely mild.[2][16]

Traders should watch the live station observations through the day, because the settlement source is the Weather Underground Daily Observations table, not the headline day-high figure.[6] The main catalysts are any late morning or early afternoon warming, shifts in northerly wind, and the timing of rain bands; AccuWeather flags cloud, a steady breeze and a 25% precipitation chance, while WeatherWatch and the Met Office both indicate breezy, unsettled conditions that would cap the ceiling.[2][5][13] There is no obvious cross-market discrepancy in the available data: sportsbook-style forecasts and weather services are clustered around low-teens Celsius, while the market implies a near-certain miss on the contract’s yes side.[2][5][13]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Wellington on August 8? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

What are the best prediction markets for UK traders in 2026?

For UKGC-regulated markets: Betfair Exchange (sports, politics) and Smarkets (sports, politics, lower commission than Betfair). For broader global event prediction: Polymarket (deepest liquidity, 0% fee, USDC settlement). For US-regulated option: Kalshi (USD, limited UK payment options). Most serious UK traders use a combination of Betfair for regulated sports and Polymarket for broader markets.