Highest temperature in Wellington on July 27?

Platform comparison

Market context

Polymarket is pricing this Wellington Airport temperature contract at **0% YES** on **USDC** in the **Polygon** ecosystem, which means the market is currently treating a qualifying July 27 high as not just unlikely but effectively outside the consensus range. The contract settles against the **highest temperature recorded at Wellington Intl Airport Station** on the day, using Wunderground’s daily history page, so the relevant trading question is not whether Wellington feels mild or warm in general, but whether the airport posts a reading that lands in the market’s specified Celsius band by the settlement cut-off.[1][3]

That zero price sits against a July climate backdrop that usually argues for restrained upside rather than summer-style spikes. Wellington’s July norms are typically around **12°C highs** and **9°C lows**, with frequent rain and breezy conditions; one July outlook also puts the day’s nearby high only around **10°C** and notes the coolest night around **5°C**.[1][3] For market context, that makes the contract behave less like a toss-up and more like a tail-event bet on an unusually warm airport reading, especially because the resolution source is a single observing station rather than citywide weather averages.[1]

For traders, the main catalysts are the day’s **official airport observations**, any late-shifting **forecast updates** on temperature and cloud cover, and whether wind or rain keeps the daytime high capped. AccuWeather’s current Wellington reading is **59°F/15°C** with modest wind, while BBC Weather shows **10°C** conditions and steady pressure, both consistent with a cool winter pattern rather than a sharp warm-up.[2][4] In a conditional-token market, that matters because price can only move if traders think the final airport maximum has a realistic path into the settlement range before the window closes.[1][2][4]

Sources: 1 · 2 · 3 · 4

Methodology

We track Highest temperature in Wellington on July 27? 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

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

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 Polymarket Alternative UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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 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.