Highest temperature in Wellington on August 16?

Platform comparison

Market context

Wellington's maximum temperature on 16 August 2026 will be determined by the Daily Observations record at Wellington International Airport, with the crowd currently assigning zero probability to any outcome. This reflects the substantial uncertainty inherent in forecasting a specific day's peak temperature nearly two years in advance, where seasonal patterns provide the only meaningful anchor.

August sits firmly within Wellington's winter, when daily highs typically range between 11–13°C. Historical data from the past decade shows August extremes rarely exceed 17°C, with most days settling well below that threshold. The 0% crowd probability suggests traders are either awaiting more proximate forecasting data or treating this as a placeholder market pending seasonal conditions closer to the resolution date. Comparable winter-month temperature markets in Wellington have generally resolved toward the lower end of plausible ranges, though occasional warm fronts can produce outlier days.

The critical dependency for this market is the availability of reliable long-range forecasting as August 2026 approaches. Meteorological services typically gain meaningful predictive skill only within 10–14 days of a target date; current positioning reflects that gap. Traders should monitor any significant climate pattern shifts reported by the National Institute of Water and Atmospheric Research (NIWA) during 2026, particularly if La Niña or other oscillations favour warmer-than-average conditions across New Zealand. The resolution mechanism's reliance on Weather Underground's Daily Observations table rather than summary figures introduces a minor technical dependency worth verifying closer to settlement.

Methodology

This page reviews Highest temperature in Wellington on August 16? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Prediction Today, which mirrors the Polymarket order book at 0% fees.

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.

UK Frequently Asked Questions

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.

Is Polymarket legal in the UK?

Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

How do I deposit on Polymarket from the UK?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.