Highest temperature in Wellington on July 7?

Platform comparison

Market context

On 7 July 2026, Wellington International Airport will record its highest daytime temperature, a real-world event that determines the settlement of a prediction market where the crowd currently assigns zero probability to any outcome other than the 13°C range. Historical climatology for early July in Wellington shows average daytime maxima between 11°C and 12°C, with typical winter ranges spanning 10°C to 14°C, making a 13°C peak statistically plausible and consistent with recent weather patterns where light rain and fresh breezes are common.

A power-user approaching this market programmatically would feed Wunderground’s hourly data into a conditional order bot, watching for deviations from the 11–15°C baseline that often occur during south-south-westerly wind shifts. Recent BBC Weather observations for 7 July confirm a high of 14°C with light rain showers, while NIWA reports that Wellington’s summer saw only one day surpassing 25°C, reinforcing the expectation that winter temperatures will remain within the lower band. Traders should monitor MetService wind forecasts and pressure trends, as rising pressure and strong southerly winds can push temperatures toward the upper limit of the 10–14°C range, a dependency that conditional orders can exploit if the data stream updates in real time.

The market’s 0% YES probability likely reflects a misunderstanding of the resolution source, which is Wunderground’s daily high for all times on 7 July, not a specific forecast window. Given that July 7 high temperatures in Wellington typically register exactly 14°C in early July, and that daytime highs range between 11°C and 15°C, the 13°C frontrunner at 96% odds aligns with the historical average and current weather conditions. Programmatic traders should verify the Wunderground feed against NOAA’s hourly timeseries, which recorded 14°C at 2:30 am, to confirm whether the daily high will settle at 13°C or 14°C, ensuring their conditional orders execute only when the data stream confirms a deviation from the expected range.

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Methodology

This page reviews Highest temperature in Wellington on July 7? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Polymarket Review UK, which mirrors the Polymarket order book at 0% fees.

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.

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 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.