Highest temperature in Wellington on July 23?

Platform comparison

Market context

Wellington’s official airport reading will set this market, and Polymarket currently prices that outcome at **0% YES**, implying the contract has not attracted any meaningful belief in a high-temperature print above the relevant threshold. On Polymarket, traders are still buying and selling USDC-settled conditional tokens on Polygon, so the price is the live consensus after fees, inventory, and position limits rather than a forecast in the abstract.

For a July 23 Wellington reading, the useful frame is seasonal rather than event-driven: late July is mid-winter in New Zealand, and Wellington Airport typically sits in a cool maritime regime with sea breezes and frequent fronts, which makes extreme daytime highs less common than in inland centres. That is why a zero-price contract can persist here even when the market is still open; traders are effectively saying the chance of an unusually warm spike at the airport is so small that it is not worth bidding up the token.

The main catalysts are weather, not policy or scheduling. Traders should watch the MetService forecast cycle, any short-lived northerly flow, and the possibility of a foehn-style warm burst if a front clears early enough for brief sunshine before the settlement cut-off. Because the source is a single station and a single-day maximum from Wunderground, the only thing that matters is the highest official airport temperature before 12:00 UTC on 23 July, not how warm the rest of Wellington feels.

Methodology

We track Highest temperature in Wellington on July 23? 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.

FAQ

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 PolyGram. 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.

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.

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.