Highest temperature in Wellington on July 13?

Platform comparison

Market context

Wellington faces its midwinter peak heat on 13 July 2026, with the market pricing in near-zero chance of any temperature range being hit above the current implied threshold. The settlement hinges on the highest reading at Wellington International Airport, sourced from Wunderground, while the crowd-implied probability sits at 0% YES, suggesting traders expect temperatures to remain firmly within the coldest historical bands for this date.

Historically, Wellington’s July highs rarely breach 15°C, with the all-time maximum for the city recorded at 30.3°C at Kelburn on a different date, not in mid-July [1]. Past data shows the average warmest July day in Wellington reaches just 12–14°C, and no recorded July 13 has exceeded 18°C in over a century of records [4][5]. This deep historical floor explains the 0% pricing: the event required for a YES outcome is statistically implausible under current climate norms.

Traders should monitor the National Institute of Water and Atmospheric Research (NIWA) heatwave bulletins and any sudden shifts in the Tasman Sea pressure gradient, which can trigger brief warm spells [1]. While no specific forecast announcements are scheduled for 13 July, real-time Wunderground updates will be the sole resolution trigger, and any divergence between airport and Kelburn readings could spark cross-platform odds swings if other markets use different stations [1][9].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Best Prediction Markets UK, which mirrors the Polymarket order book directly.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

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 Best Prediction Markets UK. 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.

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Best Prediction Markets UK 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.