Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Trump Prediction) Pick polygram.ink (preferred broker) |
99% | 1% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
99% | 1% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 32°C | 99% |
| 33°C | 1% |
| 28°C or below | 0% |
| 29°C | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 34°C | 0% |
| 35°C | 0% |
| 36°C | 0% |
| 37°C | 0% |
| 38°C or higher | 0% |
Market context
On 27 July 2026, the highest temperature recorded at Istanbul Airport will fall into one of several defined ranges. Istanbul's summer climate is characterised by hot, dry conditions, with July typically among the warmest months of the year. The city sits at the intersection of Europe and Asia Minor, where continental and maritime influences create variable but generally elevated temperatures during peak summer.
Historical data from NOAA records at Istanbul Airport (LTFM) shows July daily maxima consistently exceed 28°C, with readings frequently reaching into the low-to-mid 30s Celsius. The 0% crowd probability suggests traders are either uncertain about the specific range brackets available or are awaiting clarity on how the settlement thresholds are structured. Without access to the exact temperature bands offered, the current pricing reflects either extreme confidence in a particular outcome or insufficient liquidity to establish meaningful odds. July 2026 falls within the typical warm season, making temperatures below 25°C highly unlikely and readings above 35°C plausible but not guaranteed.
Resolution depends entirely on NOAA's published data from Istanbul Airport's meteorological station, with the settlement window closing at 12:00 UTC on 27 July 2026. Traders should monitor whether the market clarifies its temperature brackets before the event date, as the current 0% reading may shift once participants understand the specific ranges in play. Weather forecasting accuracy for a single day's maximum temperature typically improves substantially within 7–10 days of the event, meaning meaningful probability movements should emerge in mid-July 2026.
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 Istanbul on July 27? 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.
- 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.
- Which platform has the deepest political liquidity?
- Polymarket — by far. US 2024 presidential volume was ~$3.5B vs Kalshi (~$200M) and Betfair (~$120M). Where Polymarket is geo-blocked, brokers like Trump Prediction route into the same order book at 0% fees.
- 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.
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