Highest temperature in Wellington on August 16?

Platform comparison

Market context

The market is pricing zero probability that Wellington International Airport will record a maximum temperature of any given range on 16 August 2026. August is Wellington's coldest month, with historical daily maxima typically ranging from 11°C to 14°C, making extreme heat vanishingly unlikely during this winter period. The settlement hinges on Weather Underground's Daily Observations table for the airport station, which captures sub-daily readings rather than the summary high-low figures, introducing a technical distinction that could matter if readings cluster near range boundaries.

Wellington's August climate is shaped by Southern Hemisphere winter patterns and the city's exposed coastal geography. The MetService records show that temperatures above 16°C on an August day at the airport are exceptionally rare, with the warmest August days on record reaching only around 18–19°C under unusual anticyclonic conditions. The 0% crowd probability reflects rational consensus: the meteorological setup required for even a modest temperature spike—a northwesterly föhn wind or a stalled high-pressure system—would need to coincide precisely with 16 August 2026, an event with negligible historical precedent.

Traders monitoring this market should track MetService forecasts released in early August 2026, particularly any anomalous warmth predictions for that specific week. Whilst the consensus probability sits at zero, the resolution mechanics—using intra-day observations rather than daily summaries—mean that even marginal temperature readings could determine settlement if the day approaches the lower range thresholds. Any value proposition depends entirely on whether one believes the crowd has mispriced tail-risk scenarios, a position requiring conviction that August 2026 will deviate sharply from 150+ years of Wellington climate data.

Methodology

This page reviews Highest temperature in Wellington on August 16? 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 Who Will Win 2026, 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 Who Will Win 2026. 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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Who Will Win 2026 trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.