Highest temperature in Wellington on July 28?

Platform comparison

Market context

Wellington International Airport’s late-July weather is typically cool, breezy and changeable rather than sharply warm, which matters because the market settles on the single **highest** temperature reached during the day, not the daily mean or the overnight minimum. Current live conditions are around 10°C with humidity near 87% and northerly flow, while short-range outlooks put nearby days mostly in the single digits to low teens Celsius, with the warmest point in the 14-day view only around 12°C. That makes the current 0% implied probability for a materially higher outcome easy to understand: the event sits in a low-volatility part of Wellington’s winter climatology, where modest cloud, wind and showers tend to suppress the top reading.[1][2][3]

For a power-user, this is a good market to treat as a time-series problem rather than a one-shot opinion. The relevant inputs are the Airport Station’s observed hourly progression, any late-morning sun breaks, and whether a northerly shifts the field a degree or two above forecast; programmatically, the cleanest workflow is to poll the Wunderground history page and compare the day’s running maximum against the settlement bands until 12:00 UTC. In practice, traders watching bots or conditional orders will care more about forecast drift into the final 12–18 hours than about the full-day average, because the highest-print can occur on a brief spike even when the rest of the day stays cool.[2][3]

The main catalysts are routine weather updates rather than scheduled announcements: changes in cloud cover, frontal timing, wind direction and post-rain clearing can all move the peak temperature enough to matter at the margins. Wellington’s weather context remains dominated by rainfall and breezy conditions through July, so any forecast revision towards sunnier, calmer midday hours is the signal to watch; absent that, the market is structurally anchored to a low maximum temperature range.[2][3]

Sources: 1 · 2 · 3

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 Polymarket Review UK, 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 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'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.

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.