Highest temperature in Wellington on August 10?

Platform comparison

Market context

Wellington’s highest temperature on 10 August will be a relatively low-single-day winter reading by local standards, not a summer-style spike. August averages for Wellington sit around 12°C highs, with historical summaries commonly clustering the month’s highs in the 11–13°C range, while the current Weather Underground daily observations for 1–8 August 2026 show highs from 48°F to 61°F, which is roughly 9°C to 16°C.[1][2][6]

That context helps explain why the market’s **0% YES** crowd price looks more like a thin-book artefact than a strong weather signal. On comparable Wellington August data, the distribution is tight and the difference between a 12°C settle and a 13°C settle can come down to a brief afternoon warm-up, so traders on Polymarket-style venues typically express this as implied probability, while Kalshi and some other books surface it in decimal-style pricing; fees and access also diverge, with KYC and regional availability varying materially across platforms. Historical August records for Wellington also show occasional outliers around 14°C to 16°C, but those are not the norm and need an unusually mild day to matter.[1][2][11][13]

The main catalysts are the live observations at Wellington Intl Airport Station and the final value that appears in Weather Underground’s Daily Observations table, since the market rules make that table the primary source over the Day High & Low summary. For now, the relevant driver is the day’s local weather progression rather than any formal announcement, with forecast ranges for Wellington in August 2026 generally clustering around 50° to 60°F and overnight lows in the low-to-mid 40s°F, so traders will be watching whether the afternoon peak reaches the 12°C to 13°C band that is typical for the month.[6][17]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares Highest temperature in Wellington on August 10? 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 Robinhood Prediction Markets, 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.

What about Smarkets as an alternative?

Smarkets is a UK betting exchange with a lower default commission (2%) than Betfair. Liquidity on political markets is below Polymarket, comparable to Kalshi. Geo-blocked in many jurisdictions.

Which platform is accessible globally?

Polymarket is geo-blocked in the US/UK/EU. Kalshi is US-only. Betfair and Smarkets are UK-restricted. Robinhood Prediction Markets 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.