Highest temperature in Wellington on August 12?

Platform comparison

Market context

Wellington International Airport will record its highest temperature on 12 August 2026, with the market resolving to whichever temperature band contains the peak reading from the Daily Observations table on Weather Underground. The settlement window closes at midday UTC on that date, capturing the full diurnal cycle for the southern hemisphere winter day.

August represents Wellington's coldest month, with historical daily maxima typically ranging between 11–13°C at the airport station. The 0% crowd probability suggests traders are pricing in an expectation that temperatures will fall below the lowest available resolution bracket, though the specific temperature bands available in this market are not detailed in the current specification. Wellington's maritime climate produces relatively stable winter temperatures with minimal day-to-day volatility; extreme departures from seasonal norms occur infrequently. Comparable August days over the past decade show little variation beyond a 3–4°C range from the monthly average.

The primary catalyst for temperature movement will be the passage of weather systems across the lower North Island in early August 2026. Traders should monitor MetService New Zealand forecasts and atmospheric pressure patterns developing in late July, as these determine whether cold southerly flows or warmer northerly advection will dominate on the resolution date. The specific resolution methodology—drawing exclusively from Weather Underground's Daily Observations table rather than summary figures—creates a technical dependency on that platform's data availability and accuracy on the day.

Methodology

Political prediction markets differ structurally from sports betting: thinner liquidity, longer settlement windows, higher sensitivity to single news events. This page shows the live Polymarket quote for Highest temperature in Wellington on August 12? plus platform attributes for the three reference venues, so you can see at a glance where the deepest market for this question sits.

Resolution & payout

For political markets the resolution source is decisive. Polymarket defines a concrete source per contract (e.g. AP, Reuters, official electoral commission) and uses the UMA Optimistic Oracle as the on-chain dispute mechanism. With a clearly defined outcome the USDC payout lands within minutes of the final confirmation.

UK Frequently Asked Questions

What resolution source is used for elections?

Polymarket defines the source per contract — usually Associated Press (AP Race Call), Reuters or the official electoral commission. The source is stated in contract details before the market opens.

Can prediction markets influence election outcomes?

Markets reflect expectations rather than create them. Studies show public-facing markets can anchor expectations, but don't influence the underlying outcome. Political markets are information, not advocacy.

Which platform has the deepest political liquidity?

Polymarket — by far. US 2024 presidential volume was ~$3.5B vs Kalshi (~$200M) and Betfair (~$120M). Where Polymarket is geo-blocked, brokers like Trump Prediction route into the same order book at 0% fees.

Why do Polymarket and Kalshi differ on elections?

Kalshi must follow CFTC compliance — strict definitions, clear resolution sources, US citizens only with KYC. Polymarket operates globally without CFTC oversight — deeper liquidity, but also higher regulatory risk.

Are UK election prediction markets available from the UK?

Yes. Betfair Exchange and Smarkets offer UKGC-regulated UK election markets (seat counts, party share, constituency results). Polymarket also lists UK election contracts with deeper global liquidity. Betfair winnings are typically tax-free for UK individuals; Polymarket profits are subject to HMRC CGT.