Highest temperature in Wellington on August 4?

Platform comparison

Market context

Wellington’s temperature reading on 4 August will be set by the day’s high at Wellington Intl Airport, with the official resolution source taken from Wunderground’s history page for NZWN. Current short-range forecasts point to a cool, wintery day: BBC Weather shows Wellington/Intl at 10°C with northerly winds and high humidity, while Met Office guidance has nearby daily maxima in the 9–13°C range and windier conditions through the day.[3][5]

That makes the current 0% yes price easy to read: it is not calling the outcome impossible, but rather assigning almost no weight to a particular temperature band before the day’s actual data arrive. For context, August in Wellington is typically a low-teens Celsius month, with average highs around 11–12°C and lows near 8–9°C, so the market is really about whether the airport reaches the upper or lower end of a fairly tight winter range.[4][6][13]

The main catalyst is the sequence of intraday forecast updates and the timing of any wind or rain change-ups, because Wellington’s coastal exposure can cap highs even when skies briefly brighten. Traders should watch the airport observation feed and late adjustments from major forecasters such as BBC Weather, the Met Office and AccuWeather, since those are the most likely sources of movement before the settlement window closes.[3][5][10]

Sources: 1 · 2 · 3 · 4 · 5

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 4? 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

Political markets typically settle on official candidate or agency confirmation. Polymarket uses UMA Optimistic Oracle: a proposer posts the outcome with a bond, the two-hour window opens, then the smart contract pays USDC.

Kalshi settles USD via CFTC clearinghouse, with clearly defined resolution sources (e.g. AP race calls for elections). Betfair settles after the official outcome is registered with the league or agency. Manifold is play-money.

FAQ

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.

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.

Which political events have the biggest volume?

US Presidential election, party nominations (DNC/RNC), Senate majorities, individual state outcomes (Pennsylvania, Michigan, Wisconsin), and major European elections. Peak markets reach $50-500M per event.