Highest temperature in Dallas on June 28?

Platform comparison

Market context

The real-world event hinges on the peak heat recorded at Dallas Love Field on 28 June 2026, where official guidance and private models suggest daily highs will likely sit between 96°F and 100°F. Historical data from comparable dates in mid-June 2026 shows consistent patterns: 17 June peaked at 90–91°F, 22 June clustered around 92–95°F, and 25 June settled at 92–93°F, all well above the 0% implied probability for the lowest range. This divergence highlights how Polymarket’s decimal odds (100% frontrunner) contrast with Kalshi’s implied probability framing, while fee structures and KYC requirements further separate these platforms for climate traders.

Traders should monitor the National Weather Service’s updated heat advisories and the Wunderground historical feed, which confirms a recorded 93.0°F on 28 June 2026 with muggy dew points of 69.1°F. Recent AccuWeather forecasts for Love Field’s June 2026 period reinforce this, projecting highs of 96–100°F and overnight lows of 77–83°F. The settlement window ending 12:00 UTC on 28 June 2026 means any late-morning temperature spikes will directly resolve the market, making real-time Wunderground updates critical. Unlike Betfair’s decimal odds or Smarkets’ low-fee model, Polymarket’s 100% frontrunner status here reflects a consensus that the lowest range is virtually impossible, a stance not universally mirrored across all prediction exchanges.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We read Highest temperature in Dallas on June 28? from four platform perspectives: Polymarket (on-chain CLOB), Kalshi (CFTC-regulated exchange), Betfair Exchange (sports book exchange), Smarkets (peer-to-peer betting exchange). Polymarket's live mid is the canonical probability; the side-by-side columns benchmark fees, KYC, settlement currency and deposit rails so you can choose the venue that fits your jurisdiction and trade size.

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

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.

Is Betfair a Polymarket alternative?

Only partially. Betfair Exchange is UK-focused with a sports-betting emphasis; they have politics markets but with thinner liquidity than Polymarket. Settlement in GBP/EUR, 2-5% commission on winnings.

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.

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.

Which platform supports Klarna/SOFORT?

Directly: none. Polymarket accepts only USDC on Polygon. Robinhood Prediction Markets offers a fiat on-ramp via Klarna or SOFORT (DE/AT/CH) and converts internally to USDC for the Polymarket order book. T+1 processing.