Highest temperature in Los Angeles on July 22?

Platform comparison

Market context

The key event is the highest temperature recorded at Los Angeles International Airport on 22 July 2026, and the market is already pricing in a very tight outcome band, with Polymarket showing **76-77°F** as the 100% frontrunner while the weakest bucket sits at 0%.[1] That is materially more specific than the broader “yes/no” style pricing seen in many weather contracts, and it implies traders expect a fairly ordinary summer high rather than a spike into the upper 80s or 90s. The 0% crowd-implied probability for “Yes” should therefore be read as an artefact of the contract’s range structure and current distribution across bins, not as a literal forecast that the airport could not print a different value.[1]

Historically, late-July temperatures at LAX are often shaped by the marine layer and onshore flow, which can keep the airport notably cooler than inland Los Angeles, especially when the coastal breeze arrives early.[2] That makes the current market lean consistent with a modest-to-warm airport afternoon rather than a basin-wide heat extreme. By contrast, some local coverage was already flagging a Southern California heat-up around 22 July, with a Heat Advisory in force from 10 a.m. and regional forecasters warning of hotter conditions through the day.[3] NBC Los Angeles also reported a broader summer heat wave with public advice centred on peak-afternoon demand, cooling centres and reduced energy use, which is the sort of setup that can push airport readings higher if the marine influence weakens.[4]

A trader should watch the forecast evolution for LAX specifically, not just downtown Los Angeles or inland stations, because the settlement source is Wunderground’s daily history page for KLAX.[1] The main catalyst is whether the morning marine layer clears slowly enough to cap the day’s maximum, or whether advisory-level heat reaches the coast more directly than expected.[3][4] In cross-platform terms, the available market data show a hard bullish skew towards the 76-77°F bin, while the news flow points to a warmer-than-average day; that combination leaves little visible disagreement between prediction-market pricing and the public weather narrative, although the contract’s binning means the final print can still move one range either side if the airport stalls a degree or two earlier or later than anticipated.[1][3]

Sources: 1 · 2 · 3 · 4

Methodology

We track Highest temperature in Los Angeles on July 22? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Best Prediction Markets. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Best Prediction Markets trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.