Highest temperature in Wellington on July 1?

Platform comparison

Market context

The underlying event is the highest temperature recorded at Wellington International Airport on 1 July 2026, with the market currently implying a 0% chance of any outcome above the lowest bracket. This near-zero probability for higher ranges starkly diverges from the active Polymarket contract, where traders assign a 68% probability to 12°C as the frontrunner, followed by 13°C at 23%[1]. While no sportsbook lines exist for this specific weather event, the prediction-market consensus on Polymarket suggests a clear expectation of early-winter norms, whereas the current contract’s implied probability appears to reflect a mispricing or a different resolution threshold entirely.

Historically, Wellington in July sees cool, stable conditions, with climatological data supporting temperatures around 11–12°C as typical for early winter[1]. Extreme heat is rare; the city’s all-time maximum of 30.3°C occurred during a heatwave in summer, not winter[2], and the lowest temperature ever recorded in New Zealand on 1 July was −8.6°C in Lincoln, Canterbury[6]. These precedents frame the current 0% probability as an outlier, especially when compared to the active market’s 68% confidence in 12°C, suggesting the current contract may be anchored to a resolution source or threshold that excludes plausible winter highs.

Traders should monitor daily weather bulletins from NIWA and real-time updates from Wunderground, the designated resolution source for the active market[1]. Any sudden shifts in southerly wind patterns or cloud cover could influence the day’s peak temperature, though such events are uncommon in July. Recent NIWA reports on heatwave patterns highlight the volatility of temperature extremes in New Zealand, but these typically occur in summer months, not winter[2]. With the settlement window ending 12:00 UTC on 1 July 2026, timely data from Wunderground will be critical for accurate resolution.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Wellington on July 1? 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 PolyGram, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

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.

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.

Do I need to KYC for this market?

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

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.