Highest temperature in Wellington on July 16?

Platform comparison

Market context

Wellington’s highest temperature on 16 July 2026 at the international airport station is the real-world event this contract tracks, with the market currently pricing a YES outcome at 0% on Polymarket. Traders using USDC on Polygon are betting on conditional tokens that resolve once Wunderground publishes the day’s peak Celsius reading, a process locked until the settlement window closes at 12:00 UTC on 16 July 2026.

Historically, mid-July in Wellington sees average highs near 12–14°C, with extremes rarely exceeding 18°C; the 0% implied probability suggests the crowd expects no temperature spike into the upper ranges that would trigger a YES resolution. Comparable cases from 2020–2025 show July 16 highs consistently below 17°C, reinforcing the market’s scepticism about a significant heat event.

Traders should monitor the New Zealand Meteorological Service’s daily weather bulletins and any sudden shifts in the Southern Oscillation Index, which can influence coastal temperature anomalies. A recent report from the NZ Herald notes that an approaching high-pressure system may suppress cloud cover, potentially nudging temperatures slightly higher, though not enough to breach the threshold implied by the current pricing [1].

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.

FAQ

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.

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.

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.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.