Highest temperature in Wellington on June 25?

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Market context

The underlying event is the highest temperature recorded at Wellington International Airport on 25 June 2026, measured in degrees Celsius. Current crowd-implied probability sits at 0% for a specific range, reflecting the market’s view that the day’s peak will likely fall outside the traded bracket. Historical data shows June highs in Wellington typically range between 12°C and 15°C, with overcast conditions common and solar input stable around 1.8 kWh daily[1]. Notably, MetService NZ recently confirmed Wellington has already surpassed its record June maximum, with temperatures exceeding 19°C earlier in the month[5], suggesting anomalous warmth may persist.

Traders should monitor real-time weather updates from Wunderground and MetService NZ, as sudden shifts in wind direction or cloud cover could alter the day’s peak temperature. The settlement window closes at 12:00 UTC on 25 June, so any late-morning heat spike will be decisive. While crypto macro factors like BTC/ETH funding rates or USDC liquidity flows do not directly influence weather, whale activity in prediction markets could impact pricing if large positions enter before settlement. Recent news from MetService highlights record-breaking warmth, which may increase volatility in temperature forecasts[5]. Exchange spot data and funding rates remain relevant for assessing market sentiment but are secondary to the actual meteorological outcome.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reads Highest temperature in Wellington on June 25? 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.

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.

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.