Highest temperature in Wellington on August 8?

Platform comparison

Market context

Wellington’s **8 August maximum temperature** is shaping up to be a low-variance, cool-season outcome rather than a sharp weather surprise, with most forecast sources clustering in the low-to-mid teens Celsius and only a small spread around the day’s peak. AccuWeather has a 57°F high for Saturday, while other forecasts put Wellington around 12°C to 13°C, and seasonal averages for August are close to 12°C, which means the market’s **0% YES** pricing looks consistent with a broad expectation that the highest reading will stay in a modest band rather than spike into a much warmer range.[2][6][17]

That matters because this contract resolves from Weather Underground’s **Daily Observations** table for Wellington Intl Airport Station, not the headline “Day High & Low” panel, so traders should care about the actual airport observation sequence rather than a rounded daily summary. Comparable August climatology also points to a narrow distribution: WeatherSpark says Wellington’s August highs are usually around 54°F, rarely above 59°F, and AccuWeather’s monthly outlook shows daily highs mostly between 53°F and 60°F.[10][1] On that basis, the actionable comparison is less about whether it gets warm and more about whether the airport observation can clear the upper end of the likely forecast band before the settlement window closes.[10][1]

The main catalysts are the timing of daytime warming, wind direction, and any late changes in cloud or rain, since current forecasts call for cloudy, breezy conditions with rain developing later in the day.[2][3][11] Wunderground’s hourly outlook already shows rain developing after midnight and a low near 50°F, which reduces the odds of an outlier afternoon surge.[11] In cross-platform terms, sportsbook-style weather pricing and analyst forecasts both lean cool-to-mild, while the prediction market’s zero-implied probability suggests an even more conservative reading of the settlement bands than the public forecast consensus.[2][3][11]

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

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.

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.