Highest temperature in Wellington on August 11?

Platform comparison

Market context

Wellington’s temperature on 11 August 2026 will be judged by the highest reading at Wellington Intl Airport Station, not by any broader “day high” summary, so traders need the Weather Underground Daily Observations table rather than headline weather widgets. In seasonal terms, Wellington is usually cool in August: long-run averages cluster around a 12-13°C daytime high and roughly 7-9°C at night, with rainfall common and winds often a bigger issue than heat.[1][2][17]

That backdrop makes the current 0% YES implied probability look heavily anchored to history rather than to any live forecast. Recent August history on Weather Underground shows daily highs mostly in the low-to-mid teens Celsius, and comparable climatology sources put Wellington’s August mean maximum near 12.9°C, with record highs reaching the low 20s in exceptional warm spells.[7][17] For a market settled into temperature ranges, the practical comparison is with nearby venue-style weather contracts: Polymarket typically quotes as an implied probability, whereas Kalshi and Betfair-style books frame the same outcome through contract price or decimal odds, which can make the same weather view look different once fees and spread are added.

For catalysts, the key inputs are the actual observed maximum on the day and any late-morning or early-afternoon warming before the settlement window closes at 12:00 UTC. August highs in Wellington are often shaped by passing fronts, cloud, and wind shifts rather than sustained heat, so the main watchpoint is whether the airport station briefly touches a warmer band around midday. Platform access also matters: Polymarket and Kalshi generally require tighter onboarding than open-exchange products such as Smarkets, while Betfair’s liquidity can be deeper but fees and market direction can move the effective price away from the displayed headline quote.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares Highest temperature in Wellington on August 11? specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. The live probability is the Polymarket mid; the comparison columns summarise each venue's fee structure, KYC, settlement currency and payment rails. Every CTA routes to Polymarket Alternative, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). On-chain settlement clears in minutes — the fastest payout path of the four.

FAQ

Which platform has the deepest liquidity?

Polymarket — by a wide margin. Top markets reach $50-500M volume, Kalshi ~$200M cumulative, Betfair similar. Deeper liquidity means your trade moves the quote less.

Is Betfair a Polymarket alternative?

Only partially. Betfair Exchange is UK-focused with a sports-betting emphasis; they have politics markets but with thinner liquidity than Polymarket. Settlement in GBP/EUR, 2-5% commission on winnings.

Which platform is accessible globally?

Polymarket is geo-blocked in the US/UK/EU. Kalshi is US-only. Betfair and Smarkets are UK-restricted. Polymarket Alternative has a different geo footprint and routes to Polymarket's order book at 0% fees.

Are all these platforms regulated?

No. Kalshi is CFTC-regulated (US). Betfair and Smarkets are UK Gambling Commission licensed. Polymarket operates without explicit regulation — a different risk profile than a regulated sportsbook.

Which platform supports Klarna/SOFORT?

Directly: none. Polymarket accepts only USDC on Polygon. Polymarket Alternative offers a fiat on-ramp via Klarna or SOFORT (DE/AT/CH) and converts internally to USDC for the Polymarket order book. T+1 processing.