Highest temperature in Wellington on August 4?

Platform comparison

Market context

Wellington airport’s warmest reading on 4 August will almost certainly be a **low-teens Celsius** outcome rather than anything materially above the seasonal norm. August in Wellington is typically cool, with average daytime highs clustered around **11-13°C** and frequent breezy, damp conditions; multiple climate guides put the city’s August high near 12°C and note that rain and wind are common. That makes the current **0% YES** price look like a clear **underdog** on the outside of the distribution, but the key question is not whether it gets warm for winter, rather whether the day prints an unusually mild spike above the usual band.[4][7][14][16]

For handicapper context, the market is effectively asking whether the airport can deliver a reading outside the consensus range. Comparable August forecasts for Wellington often sit around **10-12°C**, with some models nudging to **13°C** and others holding nearer **8-9°C**; recent observations from the city have also been in that general zone, reinforcing how compressed the range usually is.[2][3][5][10][11] In that setup, the favourite is the middle of the weather distribution, while the value debate is whether the top end of the day can stretch high enough to justify a contrarian longshot on a warmer-than-normal maximum.[4][6][15]

Traders should watch the short-range forecast updates from the MetService and airport observations as the date approaches, because Wellington’s maximum temperature can be sensitive to cloud breaks, wind direction and rain timing rather than any single large synoptic change.[5][20] If forecasts continue to show overcast skies, showers and brisk southerlies, the ceiling stays constrained; if skies clear for even a few hours and winds ease, the market’s upper temperature bands become more plausible. Current model-style previews still lean cool, which keeps the consensus centred on the mid-teens or below and leaves only a narrow contrarian case for a notably warmer print.[2][5][8]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Wellington on August 4? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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 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.

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.

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.