Highest temperature in Wellington on July 31?

Platform comparison

Market context

Wellington Airport’s weather on 31 July is usually a cool, changeable winter setup, and the current forecast points to a daytime high around 12°C with patchy rain nearby rather than any marked warmth. That matters because this market resolves to the *highest* temperature reached at Wellington Intl Airport on the day, so even a brief afternoon lift above the forecast peak would shift the settlement band. Short-range forecasts now show rain risk and modest winds rather than a strong warm-up signal.[1][3][4]

Historically, late July in Wellington sits near the low-teens Celsius for daytime highs, with average July highs around 11°C to 12°C and occasional days edging a little higher. NIWA’s seasonal outlook for May to July 2026 also leans towards near-average to below-average temperatures for the west of the North Island, which includes Wellington, implying limited support for an outlier warm reading.[12][19] In practical terms, the 0% crowd-implied probability for a higher temperature band is consistent with a market reading the day as a fairly typical winter session rather than one with a late upside surprise.[6][12][19]

The main catalyst to watch is the final overnight and early-morning forecast from MetService and nearby station observations, because Wellington can change quickly with shifts in wind direction, cloud breaks and rain timing. AccuWeather’s warning feed currently flags strong northerly winds through the morning, while BBC observations at Wellington/Intl show cool, humid conditions and light winds right now, which is a mix that usually limits a pronounced daytime spike unless the cloud clears earlier than expected.[3][4] Traders should also watch whether the rain band arrives sooner or later than forecast, since any longer dry window around midday is the most plausible route to a slightly higher airport maximum.[1][8]

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 July 31? 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

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.

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.

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.