Pronóstico: Highest temperature in Wellington on June 30?

Platform comparison

Market context

The underlying real-world event is straightforward: on 30 June 2026, the Wellington International Airport Station will record its highest temperature for the day, and this market resolves to the specific degree Celsius range containing that peak. Currently, Polymarket prices the YES contract at 0%, implying the crowd believes the temperature will not fall into the designated range, a stark contrast to the on-chain mechanics where USDC trades on Polygon via conditional tokens. This zero probability suggests traders are confident the day’s high will be significantly outside the target band, likely due to Wellington’s typical June climate.

Historical data frames this reading clearly: June at Wellington International Airport usually sees average daily highs dropping from 57°F to 54°F, with overcast conditions occurring about 42% of the time, and the coldest month being July with an average high of only 54°F [4][7]. Recent records show Wellington has already beaten its maximum June temperature, recording over 19°C earlier in the month, yet the current 0% price indicates traders expect a return to colder norms rather than another anomaly [8]. The 14°C peak recorded on 11 June, which held 44.5% probability, further illustrates how volatile June highs can be, yet the market now dismisses the target range entirely [2].

Traders should watch MetService NZ announcements for any shifts in wind patterns or cloud cover, as the current south-south-westerly winds at 24 mph and rising pressure at 996mb could suppress temperatures further [1][8]. The settlement window ends 2026-06-30T12:00:00Z, so real-time dependencies like Wunderground’s hourly updates will be critical for final resolution [3]. No major weather schedules are imminent, but the record-breaking warmth earlier in June means any sudden cold front could validate the 0% price, making the day’s hourly temperature logs the primary catalyst to monitor.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Pronóstico: Highest temperature in Wellington on June 30? 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

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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 Qué Es. 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 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.