Highest temperature in Wellington on August 11?

Platform comparison

Market context

Wellington’s airport temperature for 11 August 2026 will be resolved off Weather Underground’s **Daily Observations** table, so the key number is the day’s actual peak reading in degrees Celsius rather than the broader “Day High & Low” summary. August in Wellington is typically cool: the World Weather Information Service gives a normal maximum of about **12.9°C** for the month, while Weather Underground’s own Wellington history shows an August daily high around **12°C** and recent August observations clustering in the low-to-mid teens Celsius.[7][3][5]

A crowd-implied **0% YES** price is an extreme read against those climatological baselines, because the market only needs the observed high to land in the quoted range, not to set a record. On comparable Wellington August days, published history shows highs in the mid-teens Celsius are ordinary, and recent early-August observations have already been around **10–13°C** depending on the site and hour, which is exactly the sort of distribution that keeps this contract sensitive to a modest warm spell rather than a rare heat event.[8][1][18]

For traders comparing books, the main distinction is presentation and access rather than the underlying weather risk: Polymarket and Kalshi usually show **implied probability**, whereas Betfair and Smarkets are typically read through **decimal odds**, which can make the same view look different after commission or spread. Liquidity and fees matter here because a narrow weather band market can move on a single forecast update, and KYC reach is not identical across platforms; the practical trigger to watch is whether forecasts for Wellington Airport turn warmer or windier in the lead-up, since cloud cover, southerly airflow, and precipitation can keep the afternoon peak pinned near the month’s norm.[7][3]

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 Kalshi Alternative, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Polymarket settles via UMA Optimistic Oracle on Polygon. A proposer posts the outcome with a bond, the two-hour window runs, then the smart contract pays USDC.

Kalshi settles USD through the CFTC-regulated clearinghouse — the cleanest variant, with heavier KYC. Betfair Exchange settles in account currency (GBP/EUR), net of 2-5% commission. Smarkets follows the same model as Betfair with a lower default 2% commission.

FAQ

What does Polymarket cost vs Kalshi?

Polymarket: 0% fees, only Polygon network costs (~$0.01/trade). Kalshi: up to 7% per trade plus spread. For high-frequency traders, Polymarket is dramatically cheaper.

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. Kalshi Alternative has a different geo footprint and routes to Polymarket's order book at 0% fees.

Which platform supports Klarna/SOFORT?

Directly: none. Polymarket accepts only USDC on Polygon. Kalshi 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.