Highest temperature in Wellington on July 31?

Platform comparison

Market context

Wellington’s immediate set-up has cooled slightly over the past day or two, with the latest local forecasts leaning towards a cool, damp Friday rather than a sharp warm-up. Temperatures.com currently shows a Friday high of 53°F, or about 11.7°C, with patchy rain nearby and a fairly high chance of precipitation, while BBC Weather’s latest observation for Wellington/Intl is 10°C with light northerly winds and humid conditions.[1][4][5] For a market that settles on the *highest* temperature reached during the day at Wellington Intl Airport, that matters because the day’s peak can be driven by brief breaks in cloud cover and timing around late morning or early afternoon rather than by the headline daily high alone.

The historical frame also points to a fairly tight distribution around the low teens Celsius for late July in Wellington. AccuWeather’s July climatology for Wellington, New Zealand shows historical averages near 12°C for both highs and lows, and weather25 places 31 July in recent years mostly around 11–15°C maximums with mixed rain or drizzle.[3][9] In other words, the current 0% implied probability of a materially higher outcome looks consistent with the seasonal baseline: July in Wellington is usually a cool winter day, so the market is really about whether the airport briefly touches the upper end of that normal range rather than testing anything extreme.[3][9]

The main catalysts to watch are the timing and persistence of rain bands, cloud breaks, and wind shifts around the airport site. If showers clear for a few hours, the observed maximum can still edge up by a degree or two even when the forecast headline remains modest; if rain holds through the afternoon, the day’s high is more likely to stay near the current 10–12°C range.[1][4][5][16] Traders should also watch for any updated MetService or BBC forecast changes as Friday approaches, because small revisions in cloud cover or wind direction can matter more here than broad regional averages.[5][16]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Wellington on July 31? 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 Prediction Today, 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 Prediction Today. 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.

Do I need to KYC for this market?

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