Highest temperature in Wellington on July 1?

Platform comparison

Market context

On 1 July 2026, Wellington will face its coldest month of the year, with historical averages showing highs near 53°F (12°C) and lows around 45°F (7°C)[4]. The crowd-implied probability of 0% YES for any temperature above a specific high threshold reflects this winter reality, where extreme heat is virtually non-existent. Historically, Wellington’s all-time maximum of 30.3°C was recorded at Kelburn on a heatwave day, but such events are rare and typically occur in summer, not July[1]. Even the coldest day ever recorded in New Zealand, −8.6°C on 1 July 1995, underscores the winter chill that defines this date, making any prediction of high temperatures a clear underdog bet[6].

Traders should monitor southerly wind forecasts, which often bring sharp temperature drops to Wellington, as seen in the 37.1 m/s gust on 20 June 2013[3]. No major heatwave announcements are expected for early July, and the consensus remains firmly on low temperatures, with value potentially lying in contrarian bets on slightly warmer-than-average days if a weak northerly flow develops. Recent NIWA reports confirm that July is consistently the coldest month, with no significant heat events forecasted for 2026[1]. The settlement window ending 2026-07-01T12:00:00Z leaves little room for late surprises, reinforcing the 0% probability as a rational favourite spot.

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 Who Will Win, 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 Who Will Win. 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'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.

Do I need to KYC for this market?

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