Highest temperature in Wellington on June 24?

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Market context

The real-world event hinges on the highest temperature recorded at Wellington International Airport in New Zealand on 24 June 2026, measured in degrees Celsius. Current crowd-implied probability sits at 0% for a "YES" outcome, suggesting the market expects the temperature to fall outside the specific range being traded, likely due to the region's typical cool June climate.

Historical data frames this probability with stark clarity: average daily highs at Wellington International Airport in June drop from 57°F to 54°F, with overcast conditions prevailing 42% of the time [1]. While MetService NZ recently reported record-breaking June temperatures exceeding 19°C earlier in the month, such anomalies are rare and do not align with the standard cooling trend expected by mid-June [7]. The 0% probability reflects this statistical norm rather than an expectation of extreme heat.

Traders should monitor real-time weather feeds from the National Weather Service for Wellington International Airport, specifically the hourly high temperature charts, as settlement relies on Wunderground data sourced from this station [2]. Any sudden shifts in wind speed or precipitation could alter the thermal profile, though current forecasts for Wellington, PE (a different location) show no immediate heat warnings [5]. The market’s USDC settlement and on-chain mechanics tie directly to this external data feed, meaning whale flows will likely react only if Wunderground publishes an unexpected spike above the historical average.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reads Highest temperature in Wellington on June 24? on-chain. Polymarket's quote comes directly from the Polygon order book — the only comparable venue with on-chain settlement. Kalshi (USD, off-chain), Betfair (GBP/EUR, off-chain) and Manifold (play-money) are listed for comparison. Every CTA routes to BTC Prediction, which mirrors the Polymarket order book directly.

Resolution & payout

Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.

Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.

FAQ

Where can I trade this market with the lowest fees?

On BTC Prediction, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

BTC Prediction is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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 it cost to trade on BTC Prediction?

Zero. BTC Prediction routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, BTC Prediction triggers a quick verification flow that finishes in minutes.