Highest temperature in Wellington on August 1?

Platform comparison

Market context

Polymarket prices this contract at **0% YES** today, which is a blunt expression of how little the market expects Wellington’s airport to produce a higher-than-usual reading on 1 August. The market resolves off the **highest temperature recorded at Wellington Intl Airport Station** during the day, so the relevant figure is the day’s peak, not the average or the overnight low. Because settlement uses **USDC** on **Polygon** through **conditional tokens**, the trading question is whether the airport log will land in the contract’s chosen Celsius band when Wunderground publishes the official history entry.

The historical framing leans cool: August in Wellington is typically a winter month with average highs around **12°C to 13.8°C**, depending on the source, and daily highs are usually near the low teens rather than anything extreme.[1][4][11][13] Comparable August records also suggest limited upside, with one source citing an August record high of **18°C** in 2017 and another showing a maximum of **26.0°C** across a broader station history, which underlines that outliers exist but are uncommon.[4][14] For a prediction market trader, that matters because the current 0% price implies the contract is being read as a low-probability warm spike rather than a routine winter day.

The main catalysts are practical rather than narrative: the airport’s observed maximum depends on the day’s weather evolution, especially sun breaks, wind shifts, and any passing front that suppresses or lifts the afternoon high. Wellington’s weather is often changeable, and the settlement source is a daily station history page, so the key dependency is the final Wunderground record at Wellington Intl Airport rather than any city forecast headline.[1][10] Traders usually watch the hourly forecast updates, any developing high-pressure ridge, and whether the airport’s recorded maximum is being nudged by a late-day warm-up before the UTC settlement cut-off.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

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 PolyGram. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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 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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like PolyGram 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.