Highest temperature in Toronto on August 7?

Platform comparison

Market context

Toronto’s highest temperature on 7 August 2026 is the event, and Polymarket currently prices the contract at **0% YES**, which means the crowd is assigning no value to the listed outcome band at present. On Polymarket, traders buy and sell **USDC-settled** shares on Polygon, with the correct **conditional token** paying out $1 if the market resolves into the matching Celsius range; here, the resolution will come from Weather Underground’s **Daily Observations** table for Toronto Pearson Intl Airport, not the summary “Day High & Low” figure.

For context, Toronto’s August highs are typically in the mid-20s Celsius, and the market’s own ladder shows the crowd has historically clustered around that zone on similar summer-date temperature contracts. Polymarket’s live page for this market has previously shown the most-traded bands around **26°C** and **27°C**, which is consistent with late-summer normals rather than an outlier heat event.[3] A useful local comparison is the recent market for 2 August 2026, which resolved to the **24°C** band after the official daily high came in at 24°C, showing how tightly these contracts depend on the exact station reading rather than a broader city forecast.[19]

A trader watching this market should focus on the Toronto Pearson hourly and daily observation trail rather than the city forecast headline. The main catalysts are the afternoon peak temperature, any convective storms or lake-breeze shifts that cap the high, and whether the station records a brief late-day spike before the settlement window closes at **12:00 UTC**. Forecast products for Toronto around early August have been showing sunny, mid- to upper-20s conditions, with one current monthly outlook putting 7 August near **27°/21° C**, which is the sort of setup that can still resolve one band lower if clouds or rain arrive earlier than expected.[6]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Toronto on August 7? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

UK Frequently Asked Questions

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

Is Polymarket legal in the UK?

Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

How do I deposit on Polymarket from the UK?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.