Highest temperature in Wellington on August 19?

Platform comparison

Market context

Wellington International Airport will record its highest temperature on 19 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 calendar day's meteorological data from the station.

August in Wellington typically sees winter conditions in the Southern Hemisphere, with mean maximum temperatures around 13–14°C and daily highs rarely exceeding 16°C. Historical records from the airport station show August extremes clustering in the 18–22°C range on warmer days, though sub-10°C readings occur frequently. The 0% crowd probability suggests traders are pricing in either an expectation of unusually cold conditions or uncertainty about the specific temperature bands offered in the market's resolution criteria.

The primary catalyst affecting this market's outcome remains atmospheric conditions in the week preceding 19 August 2026. Southern Ocean weather systems and high-pressure ridges moving across the Tasman Sea will determine whether Wellington experiences a typical winter day or an anomalous warm spell. Traders should monitor MetService New Zealand forecasts and longer-range climate outlooks from mid-August onwards, as these will provide the most reliable indication of likely temperature ranges. The specificity of Weather Underground's Daily Observations table as the resolution source—rather than summary figures—means traders must verify which station data feeds into that particular database field to ensure accurate settlement interpretation.

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 19? 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

How accurate are political prediction markets?

Historically more accurate than polls. Polymarket's Brier score on US 2024 elections was ~0.11 — better than 538 (~0.14) and every mainstream poll. Markets aggregate information with real skin in the game.

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.

How fast do political markets react to news?

High-liquidity markets move within seconds to minutes. A Trump tweet on the economy can shift the "Trump 2024" market 2-5 points before mainstream media has written anything.

Are political prediction markets legal in my country?

It varies. They sit in legal gray areas in most jurisdictions. Polymarket is geo-blocked from US/UK/EU; some broker frontends have a different geo footprint. Trade only with capital you can afford to lose, and only if you understand the legal status in your jurisdiction.

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.