Highest temperature in Toronto on July 9?

Platform comparison

Market context

The real-world event is the daily high temperature recorded at Toronto Pearson International Airport on 9 July 2026, with the market currently implying zero chance of the temperature reaching the specified threshold. Historical data for this location shows July highs typically centre around 26.4°C (79.5°F), rarely dipping below 21°C or exceeding 32°C, while the warmest day of the month usually occurs around 18 July with a peak of 26.4°C[10]. Comparable cases from early July 2026, including a severe heatwave on 2 July that grounded 356 flights across Canada, demonstrate that extreme spikes are possible but often transient, whereas the current 0% probability suggests the market views the specific threshold as highly unlikely given the seasonal average of 26°C for mid-July[6][3].

Traders should monitor upcoming meteorological announcements and scheduled weather model updates for the Greater Toronto Area, particularly any declarations regarding the continuation of the seasonable heat noted on 7 July[7]. The market appears to be leaning on the catalyst of the official daily high temperature release from Environment and Climate Change Canada, which will determine the outcome once the settlement window closes at noon on 9 July 2026[1]. Recent news sources confirm that while a summer 2026 heatwave has shattered records elsewhere, with peaks hitting 89°F on 3 July, the specific conditions for 9 July remain the critical dependency for this contract[9]. No moralising is required; the facts indicate that the probability is driven by the forecasted range of 73°F to 93°F for the airport in July 2026, making the implied 0% a reflection of current model consensus rather than absolute certainty[2].

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 Toronto on July 9? 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

How accurate are political prediction markets?

Historically more accurate than polls. Polymarket's Brier score on US 2024 elections was ~0.11 — better than 538 (~0.14) and every mainstream poll. Markets aggregate information with real skin in the game.

What resolution source is used for elections?

Polymarket defines the source per contract — usually Associated Press (AP Race Call), Reuters or the official electoral commission. The source is stated in contract details before the market opens.

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.

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.