Highest temperature in Wellington on June 30?

Platform comparison

Market context

The underlying real-world event is the highest temperature recorded at Wellington International Airport on 30 June 2026, measured in degrees Celsius. Current crowd-implied probability sits at 0% for the "YES" outcome, suggesting the market expects the temperature to fall outside the specific range being traded. On Polymarket, this contract is priced using USDC on the Polygon network, where conditional tokens reflect the collective belief that June 30 will not breach the threshold, despite the on-chain mechanics allowing for precise, binary settlement.

Historical data frames this near-zero probability with stark clarity. Wellington’s average daily high in June drops from 57°F to 54°F (roughly 14°C to 12°C), with overcast skies occurring 42% of the time [3]. While MetService recently reported Wellington beating its record maximum June temperature with over 19°C recorded earlier in the month [5], such extremes are anomalous for late June. The current 12°C reading at the airport [7] aligns with typical winter minima, reinforcing the market’s scepticism that a significant spike will occur on the settlement date.

Traders should monitor the MetService daily forecasts and any sudden shifts in the South South Westerly wind patterns, which currently drive 24 mph winds and 72% humidity [1]. A key catalyst is the scheduled release of the 15-day forecast, which may reveal unexpected warming trends or confirm the persistent cold. Additionally, watch for announcements regarding regional weather anomalies, as even a brief lapse in the prevailing westerly flow could alter the temperature trajectory. The resolution depends entirely on Wunderground’s official daily high, making real-time meteorological updates the primary dependency for any trader assessing the 0% pricing [5].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Wellington on June 30? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Polymarket Legit?, which mirrors the Polymarket order book at 0% fees.

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 Legit?. 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.

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 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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Polymarket Legit? trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.