Highest temperature in Wellington on August 7?

Platform comparison

Market context

Wellington’s airport needs an unusually warm afternoon for this market to settle **YES**, because the contract resolves to the day’s *highest* temperature at Wellington International Airport, in Celsius, from Wunderground’s history page. August in Wellington is normally cool and changeable: nearby climate datasets put average August highs around **12–13.6°C**, with rainfall frequent and winds often strong, which limits the odds of a large one-day spike in maximum temperature.[1][2][7][15]

The current **0% YES** price fits that seasonal backdrop. Recent August normals and historical comparisons show Wellington’s winter highs are usually clustered in the low teens, and even broader New Zealand climate summaries describe August as a cool month, with Wellington among the wetter and least sunny main centres.[2][6][18] For a materially higher reading, traders would need an unusual synoptic setup rather than a routine clear day; in practice, this kind of market is usually driven by local warming under northerly flow or a brief downslope effect, not by national temperature trends.

For the last hours before the settlement window closes, the relevant catalysts are the live airport observations feeding into Wunderground, plus any abrupt change in regional weather that pushes the afternoon maximum up or down. On-chain, the event itself is a simple USDC-settled binary, so price should mainly reflect the latest airport forecast and realised midday readings rather than broader BTC or ETH moves; crypto macro only matters if it alters risk appetite or liquidity around the market. If Wellington stays close to climatological norms, the implied probability should remain compressed; if the airport prints well above the low-teens range early, repricing can happen quickly before the final high is locked in.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically this overview focuses on on-chain pricing: Polymarket's live mid comes from the Polygon conditional-token order book and settles automatically in USDC. The other three venues — Kalshi, Betfair, Manifold — sit alongside as off-chain reference points so you can see how the contract translates across regulatory and settlement regimes.

Resolution & payout

Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.

Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.

UK Frequently Asked Questions

What are crypto prediction markets?

Crypto prediction markets are on-chain smart contracts where you buy YES or NO shares on a future crypto event (e.g. "BTC above $100k by year-end"). The market price between 0¢ and 100¢ is the implied probability.

What does a transaction cost on Polygon?

Polygon gas is typically under $0.01 per transaction. A full trade cycle (Approve + Order + Fill) totals around $0.03 — compared to $5-50 on Ethereum mainnet.

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%.