Highest temperature in Los Angeles on July 22?

Platform comparison

Market context

The relevant event is the highest temperature recorded at Los Angeles International Airport on 22 July 2026, and the market is effectively asking which Wunderground temperature band that daily peak will fall into. At the time of settlement, Polymarket is already assigning the full 100% to **76–77°F**, which leaves no visible disagreement in the crowd price on that venue.[1]

That 0% crowd-implied view should be read against Los Angeles summer climatology, where late-July highs at LAX are often in the mid-70s to low-80s rather than extreme heat. Recent hot spells in the region have still produced advisories and cooling-centre coverage, but the airport itself is moderated by the marine layer and coastal influence, so temperature bands just above 75°F are typically the base case unless a stronger inland surge reaches the coast.[2][3]

For platform comparison, this is the kind of weather market where the pricing language matters: Polymarket shows a simple probability, while Kalshi and Smarkets usually express the same view as decimal-style contract prices or odds, which makes tiny moves around a narrow temperature band look different even when the underlying expectation is similar. Betfair adds another layer because exchange fees and liquidity conditions can matter more than the headline price, and KYC access is not uniform across these venues, so the same Los Angeles temperature forecast may be tradable on one platform but not another depending on jurisdiction and verification status.

Sources: 1 · 2 · 3

Methodology

This page compares Highest temperature in Los Angeles on July 22? specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. The live probability is the Polymarket mid; the comparison columns summarise each venue's fee structure, KYC, settlement currency and payment rails. Every CTA routes to Robinhood Prediction Markets, which mirrors the Polymarket order book at 0% fees.

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

Polymarket vs Kalshi — which is better?

Depends on your location. Kalshi is CFTC-regulated, US-only with full KYC. Polymarket is global, on-chain, no KYC up to $1,500. Polymarket has ~10x higher liquidity but higher regulatory risk.

What does Polymarket cost vs Kalshi?

Polymarket: 0% fees, only Polygon network costs (~$0.01/trade). Kalshi: up to 7% per trade plus spread. For high-frequency traders, Polymarket is dramatically cheaper.

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.

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.