Highest temperature in Wellington on July 7?

Platform comparison

Market context

The real-world event concerns the highest temperature recorded at Wellington International Airport on 7 July 2026, with current market odds implying a 0% chance of any outcome above the lowest threshold. Historical data frames this probability firmly: early July in Wellington typically sees daytime highs between 11°C and 15°C, with the warmest day in the first ten days reaching only 17.8°C on 6 July[3][4]. The seasonal outlook for May–July 2026 indicates temperatures are equally likely to be near average or below average across the region, with occasional cold snaps possible under persistent high pressure[1]. This climatic baseline explains why the market assigns near-zero probability to higher temperature ranges; the weather simply does not support such extremes in mid-winter.

Traders should monitor immediate atmospheric conditions, particularly the southerly wind flow and rising pressure currently observed at the airport, which correlate with cooler, rain-shower conditions[2]. The National Weather Service chart confirms a sustained dip in temperature over the past four days, reinforcing the trend toward below-average warmth[6]. While no specific announcements are scheduled, the key dependency is the persistence of high-pressure systems that could trigger fog and frost, further suppressing daytime highs[1]. Recent forecasts from NIWA note medium confidence in temperature predictions but highlight a reliable lean toward drier, cooler conditions as the season progresses[1]. Any deviation from this pattern—such as an unexpected northerly surge—would be the primary catalyst for a shift in implied probabilities, though current data suggests such a shift remains unlikely.

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.

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.

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.

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.