Highest temperature in Wellington on July 1?

Platform comparison

Market context

The underlying event is the highest temperature recorded at Wellington International Airport on 1 July 2026, a date that historically falls in New Zealand’s coldest month. Wellington’s July averages sit between 4°C and 12°C, with typical highs rarely exceeding 15°C, making any extreme heat an anomaly. The crowd-implied probability of 0% for a “YES” outcome reflects this climatic reality: July in Wellington is consistently cool, and temperatures above 20°C are exceptionally rare.

Historical records reinforce this baseline. In 2013, Wellington’s hottest day reached 34.2°C, but this occurred in mid-July, not the first. NIWA notes that Wellington (Kelburn) hit its all-time maximum of 30.3°C on a recent heatwave day, yet this was in summer, not winter. The coldest month remains July, with average highs of just 53°F (12°C), and no recorded instance of extreme heat on 1 July. This stark contrast between summer peaks and winter lows frames the 0% probability as grounded in decades of data.

Traders should monitor upcoming weather forecasts from NIWA and MetService for any unusual southerly shifts or heatwave warnings, though such events are improbable in early July. Recent NIWA reports on heatwave patterns highlight that extreme temperatures in Wellington typically occur in December or January, not July. With settlement ending 2026-07-01, the market hinges on whether an unprecedented weather anomaly occurs, but current analyst consensus and sportsbook lines align with the 0% implied probability, reflecting no divergence.

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 Kalshi vs Polymarket, which mirrors the Polymarket order book directly.

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