Highest temperature in Wellington on May 26?

Platform comparison

Active sub-markets

Market context

Wellington's highest temperature on 26 May 2026 will be recorded at the airport weather station and resolved against historical data from Weather Underground. May is late autumn in New Zealand's capital, with typical daily highs ranging from 13–15°C, though the range offered here spans considerably wider brackets. The 0% crowd probability suggests traders are either confident the outcome will fall outside the lowest temperature band, or liquidity remains sparse enough that no meaningful positions have formed yet.

Wellington's weather patterns in late May reflect the transition into winter, with maritime influence moderating extremes. Historical May records at the airport show maximum temperatures rarely exceeding 20°C, with cold southerly flows occasionally pushing highs below 10°C. Comparable autumn days in 2024 and 2025 provide calibration: traders should cross-reference MetService forecasts and the National Institute of Water and Atmospheric Research (NIWA) seasonal outlooks released in April 2026 to assess whether unusual warmth or cold is anticipated. The settlement window closes at midday UTC (midnight local time), meaning the final recorded high will be locked before midnight on the day itself.

Across platforms, this market highlights structural differences in weather prediction liquidity. Polymarket's decimal odds format and lower KYC requirements typically attract retail participation on niche events; Kalshi and Betfair offer tighter spreads on established weather markets but require fuller identity verification. Smarkets' commission structure favours longer-duration positions. For a single-day, location-specific temperature event with limited historical precedent in the prediction market space, traders should expect wider bid-ask spreads and lower depth than established sports or political markets.

Methodology

We read Highest temperature in Wellington on May 26? from four platform perspectives: Polymarket (on-chain CLOB), Kalshi (CFTC-regulated exchange), Betfair Exchange (sports book exchange), Smarkets (peer-to-peer betting exchange). Polymarket's live quote comes directly from the Polygon order book; the other three are listed with their platform attributes — fees, KYC, settlement currency, payment options — because a 1:1 contract comparison without API access would be guesswork.

Resolution & payout

Polymarket settles via UMA Optimistic Oracle on Polygon. A proposer posts the outcome with a bond, the two-hour window runs, then the smart contract pays USDC.

Kalshi settles USD through the CFTC-regulated clearinghouse — the cleanest variant, with heavier KYC. Betfair Exchange settles in account currency (GBP/EUR), net of 2-5% commission. Smarkets follows the same model as Betfair with a lower default 2% commission.

FAQ

Where can I trade this market with the lowest fees?

On Polymarket Alternative UK, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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 it cost to trade on Polymarket Alternative UK?

Zero. Polymarket Alternative UK routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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.

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.