Pronóstico: Highest temperature in Wellington on July 1?

Platform comparison

Market context

Wellington, New Zealand, on 1 July 2026, is deep in its winter season, where daily maximum temperatures typically hover near 12–14°C, rarely exceeding 18°C. The current crowd-implied probability of 0% YES for any temperature range above 25°C reflects this stark seasonal reality: July is the coldest month in Wellington’s climate cycle, with no historical record of a summer-like heat spike on this date.

Historical data from NIWA confirms that Wellington (Kelburn) reached its all-time maximum of 30.3°C only once, on a day in summer, not in July [2]. The highest temperature ever recorded in New Zealand was 42.4°C in Lincoln, Canterbury, but that occurred in January, not July [5]. Even in Florida’s Wellington, July highs average 89°F (31.7°C), but that location is irrelevant to New Zealand’s winter conditions [1]. No comparable case exists for a July heatwave in Wellington, NZ, making the 0% probability logically sound.

Traders should monitor NIWA’s weekly heatwave bulletins and any unusual southerly wind shifts, though these typically bring cooling, not warming [2]. There are no scheduled announcements or climate dependencies expected to alter July’s thermal baseline. Recent news from NIWA highlights that extreme heat in Wellington is confined to summer months, reinforcing the futility of betting on a July spike [2]. The on-chain mechanics—USDC on Polygon, conditional tokens—remain unchanged, but the market’s resolution hinges solely on Wunderground’s verified daily maximum at Wellington Intl Airport, which will almost certainly fall below 20°C.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Pronóstico: Highest temperature in Wellington on July 1? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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 Polymarket Qué Es. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

Do I need to KYC for this market?

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