Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Trump Prediction) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
100% | 0% | 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 |
|---|---|
| 100-101°F | 100% |
| 95°F or below | 0% |
| 96-97°F | 0% |
| 98-99°F | 0% |
| 102-103°F | 0% |
| 104-105°F | 0% |
| 106-107°F | 0% |
| 108-109°F | 0% |
| 110-111°F | 0% |
| 112-113°F | 0% |
| 114°F or higher | 0% |
Market context
Dallas’s heat on 6 August is the real-world driver here, and the market is leaning on the forecast that the city will stay in the triple digits rather than the much lower 0% implied outcome. Weather Underground’s Dallas Love Field history page is the settlement source, while local and national forecasts pointed to an afternoon high around 101°F, with CBS News Texas noting that hot weather would continue and that the day’s high could reach 101°F.[3][9] The current crowd price therefore appears to be anchored to the expectation that the recorded maximum will land in the 100–101°F bucket rather than below that range.[2][9]
For context, Dallas in August is a classic high-variance heat market: small forecast errors, cloud cover, and the exact timing of the station’s peak observation can shift the final bucket by a degree or two. AccuWeather’s August outlook for Dallas showed several early-August highs in the mid-to-upper 90s with some days reaching 101°F, underscoring how often the city sits near the thresholds that matter for these bands.[1] By comparison, Weather Underground’s historical and NOAA climate pages show that Dallas/Fort Worth regularly produces extreme summer heat, including frequent 100°F+ days and a long record of triple-digit maxima.[7][8]
The main catalyst to watch is whether late-day heat persists long enough at Dallas Love Field to convert forecast highs into the official daily observation on Weather Underground, since that table—not the summary high/low—determines settlement.[3] Traders should also watch for forecast updates from the National Weather Service and local broadcast coverage, because revisions close to the observation window can move the market quickly; Polymarket’s event page already referenced an NWS projection near 101°F for the same date.[2]
Methodology
This page tracks Highest temperature in Dallas on August 6? across four political prediction venues. Live odds come from the Polymarket order book (the deepest political prediction-market book). Kalshi is the CFTC-regulated US alternative, Betfair the established UK sports-exchange with politics markets, Manifold the open play-money variant. For users geo-blocked from Polymarket directly, brokers like Trump Prediction provide a 0%-fee route into the same order book.
Resolution & payout
For political markets the resolution source is decisive. Polymarket defines a concrete source per contract (e.g. AP, Reuters, official electoral commission) and uses the UMA Optimistic Oracle as the on-chain dispute mechanism. With a clearly defined outcome the USDC payout lands within minutes of the final confirmation.
UK Frequently Asked Questions
- 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.
- How fast do political markets react to news?
- High-liquidity markets move within seconds to minutes. A Trump tweet on the economy can shift the "Trump 2024" market 2-5 points before mainstream media has written anything.
- Are UK election prediction markets available from the UK?
- Yes. Betfair Exchange and Smarkets offer UKGC-regulated UK election markets (seat counts, party share, constituency results). Polymarket also lists UK election contracts with deeper global liquidity. Betfair winnings are typically tax-free for UK individuals; Polymarket profits are subject to HMRC CGT.
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