Highest temperature in Los Angeles on July 17?

Platform comparison

Market context

Los Angeles is expected to reach its peak daily heat on 17 July 2026, with the market currently pricing the highest temperature at the Los Angeles International Airport Station. On Polymarket, this contract trades with the 80–81°F range as the frontrunner at 75% probability, while the 78–79°F outcome sits at 12% [1]. The crowd-implied probability for a YES resolution on any specific unlisted range remains at 0%, reflecting the market’s focus on discrete temperature bands rather than a binary outcome.

Historical patterns in mid-July for KLAX show consistent warmth, with recent data confirming LA hit 74–75°F on 4 July 2026, a result the prediction market correctly anticipated [2]. Given the seasonal climb toward peak summer, temperatures in the 80s are statistically plausible, aligning with the 75% weighting on the 80–81°F band. This historical anchor helps traders assess whether the current pricing overstates or understates the likelihood of extreme heat.

Traders should monitor real-time weather feeds from Wunderground, the designated resolution source, as the settlement window closes at 12:00:00Z on 17 July 2026 [1]. Key catalysts include overnight low-pressure systems, humidity shifts, and any sudden marine layer breaks that could spike daytime highs. Since the market resolves on-chain using USDC on Polygon via conditional tokens, price movements will react instantly to forecast updates, making timing critical for entry or exit.

Sources: 1 · 2

Methodology

We track Highest temperature in Los Angeles on July 17? 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

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

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 Kalshi UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

Do I need to KYC for this market?

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