Highest temperature in Wellington on August 3?

Platform comparison

Market context

Wellington International Airport’s highest temperature on 3 August will almost certainly land in the low teens Celsius, because August is a cool, variable winter month there rather than a heat-prone one. Long-run climate data for Wellington puts average August highs around 12–13.6°C, with typical lows near 4–9°C, which means a reading in the 10–14°C band is far more consistent with the local climate than anything approaching the upper teens. [1][3][8]

That is why the market’s current **0% YES** looks materially conservative against basic climatology, even if it reflects the contract’s exact range bands rather than a claim about a record-breaking day. Comparable August histories show Wellington’s day-time highs are usually stable, with WeatherSpark describing August as a month where daily highs are around 54°F/12°C and rarely stray far from that level; external weather-history sites also cite an August record high only in the low 20s Celsius, underscoring how unusual genuinely hot outcomes are. [14][7] If sportsbook pricing is being driven by the same seasonal profile, the main question is not whether Wellington gets warm, but whether the airport’s peak on the day sits just inside one band or the next.

Traders should watch the airport observation cycle and any synoptic shifts over the Tasman Sea, because Wellington temperatures can change quickly with wind direction, cloud cover, and frontal passage. The contract settles on the highest temperature recorded at Wellington Intl Airport Station on the day, so intraday spikes matter more than the daily mean; once the midday-to-afternoon window has passed, the highest print is usually largely determined. Historical daily summaries from Wunderground and WeatherSpark show that airport-based Wellington readings are routinely modest and close to seasonal norms, so any late forecast upgrade from a passing northerly or a brief clearing would be the main catalyst for repricing. [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

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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.

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 Best Prediction Markets 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.