Highest temperature in Wellington on August 11?

Platform comparison

Market context

The market is pricing **0%** for a Wellington peak temperature outcome that clears the relevant range, while the live weather forecasts for Wellington, New Zealand point to a cool, cloudy day with highs clustered around **11-12°C** and some light rain risk. World Weather Information Service shows **8°C to 12°C** for 11 August, AccuWeather has a **55°F / 13°C** high, and Weather Watch is similarly around **15°C day / 10°C night** with cloud and light north-easterlies.[1][2][4][5] That leaves the contract looking heavily anchored to a low-to-mid teens Celsius band rather than any materially warmer print, and it explains why the implied probability is far below a neutral 50/50 split.

The historical frame also matters: Wellington’s August climate is typically cool, breezy and fairly stable, with average highs around **12°C** and average wind speeds around **28 km/h** to **34 km/h** across different climate summaries.[11][12][13][17] Time and Date’s hourly and historic pages show a narrow intraday range on comparable August days, with temperatures rising from the high single digits early to the low teens by midday, which supports the idea that the day’s maximum usually lands close to the seasonal norm rather than spiking far above it.[7][8] For cross-platform comparison, sportsbook-style weather lines tend to price a broad forecast band, but prediction markets on this contract are ultimately driven by the exact Celsius range at Wellington Intl Airport Station, so the key question is not whether it stays cool, but whether the highest observed reading reaches the next bracket.

Traders should watch the short-term forecast updates and any change in wind or rain timing, because those are the main dependencies that could shift the afternoon high by a degree or two. The most relevant catalyst is the evolving local forecast rather than any scheduled announcement: WWIS, AccuWeather, Weather Watch and Time and Date all currently converge on a cloudy, unsettled day, with only modest precipitation probabilities and no sign of a warm air surge.[1][2][4][5][6][8] As long as the airport observation holds near those forecasts, analyst consensus remains aligned with a low-temperature resolution, and the main divergence to monitor is whether one platform edges up towards **13-15°C** while others stay near **11-12°C**.[1][2][4][5]

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

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

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.

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.

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