Highest temperature in Wellington on July 1?

Platform comparison

Market context

On 1 July 2026, the Wellington International Airport Station will record its highest temperature for the day, a metric that determines the outcome of this prediction market. The crowd currently assigns a 0% probability to any temperature exceeding the lowest range, implying near-universal consensus that July in Wellington will remain firmly cool, as it historically does. This aligns with the fact that July is the coldest month in Wellington, with average highs barely reaching 53°F (11.7°C) and average lows around 45°F (7.2°C)[4].

Historical extremes reinforce this contrarian view: while Wellington (Kelburn) recently hit an all-time maximum of 30.3°C during a heatwave, such events are rare anomalies, not July norms[1]. Even New Zealand’s highest recorded temperature of 42.4°C occurred in Lincoln, Canterbury, far from Wellington’s maritime climate[7]. The consensus is heavily skewed toward the underdog—cool temperatures—leaving little value in betting on heat, as the implied probability of 0% suggests the market already prices in the overwhelming likelihood of a cold day.

Traders should monitor upcoming weather forecasts for any unexpected southerly shifts or heatwave announcements, though July typically brings stable, cool conditions. Recent NIWA reports confirm that heatwaves in Wellington are infrequent and usually confined to summer months, not mid-winter[1]. With no major climate catalysts expected to disrupt the seasonal pattern, the value spot remains firmly on the underdog: a low temperature, as the data overwhelmingly supports a cold July 1st in Wellington.

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 Who Will Win 2026, 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

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.

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.

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.