Highest temperature in Wellington on August 18?

Platform comparison

Market context

Wellington is set for a cool, unsettled Tuesday, with the current forecast pointing to a daytime high around 12°C and showers, which leaves the market’s 0% YES pricing anchored to the usual late-winter ceiling rather than any realistic heat risk. The key resolution point is the highest temperature actually recorded at Wellington Intl Airport before the 12:00 UTC settlement cut-off, so late-morning warming matters more than the headline daily high if conditions improve briefly.

Historically, Wellington in August tends to sit in the low teens Celsius, with long-run averages around 12°C to 13°C and frequent rain or strong wind limiting upside. That makes the relevant comparison here a narrow-band contract: on most August days the outcome falls in the lowest temperature bucket unless there is an unusual break in cloud cover or a dry northerly. With no clear sportsbook line visible here, the cross-platform picture appears one-sided: prediction-market pricing is already flat at 0% YES, while the weather profile and seasonal norms both support that view.

Traders should watch the updated airport observations through the morning rather than the city forecast alone, because a brief spike in sunshine can lift the station reading even if showers return later. Wind direction, shower timing, and cloud breaks are the main dependencies, and any revision in the morning forecast will matter more than the broad monthly average.

Sources: 1 · 2 · 3 · 4 · 5

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 PolyGram, which mirrors the Polymarket order book directly.

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.

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 PolyGram trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.