Highest temperature in Wellington on July 1?

Platform comparison

Market context

The market tracks the highest temperature recorded at Wellington International Airport in New Zealand on 1 July 2026, measured in degrees Celsius. With the crowd-implied probability for any specific range sitting at 0%, the current pricing suggests the market expects no meaningful high-temperature event to occur on this date, which aligns with Wellington’s typical mid-winter climate where daily maxima rarely exceed 15°C.

Historical data frames this probability as highly plausible, given that Wellington (Kelburn) only reached its all-time maximum of 30.3°C during a rare heatwave in recent years, a condition not typical for early July [2]. Most mid-winter days in Wellington see temperatures hovering between 9°C and 14°C, making the 0% probability for elevated ranges a statistically sound reflection of the region’s seasonal norms rather than an anomaly.

Traders approaching this programmatically should monitor the National Institute of Water and Atmospheric Research (NIWA) heatwave forecasts and any sudden southerly wind shifts, which are the primary dependencies for temperature spikes in this region [2]. While no specific announcements are imminent for 1 July 2026, the settlement relies entirely on Wunderground’s daily high-temperature record, so verifying the data feed’s integrity before the 2026-07-01T12:00:00Z deadline is essential for any conditional order strategy [8].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track 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

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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 Review 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.

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 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 Polymarket Review UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.