Highest temperature in Los Angeles on July 20?

Platform comparison

Market context

Los Angeles is set to record its peak July 20 temperature at the Los Angeles International Airport Station, with the market currently pricing the 80–81°F range as a near-certainty at 100% probability, while the 0% YES implied probability for any outcome below this suggests the crowd views lower bins as underdogs with no value. Historical data for mid-July in Los Angeles County shows typical highs around 29°C (84°F), aligning closely with the favoured 80–81°F bin, and recent market behaviour on July 4, 2026, where the 74–75°F outcome surged from 42% to 100%, demonstrates the crowd’s ability to lock in accurate single-bin pricing once conditions stabilise [1][2][3].

Traders should monitor the Southern California heat wave that struck the region on 14 July 2026, as prolonged extreme heat warnings often push temperatures above seasonal averages and could validate the 80–81°F favourite or create a contrarian angle if the heatwave breaks unexpectedly before 20 July [4]. The primary catalyst is the daily Wunderground temperature feed for KLAX, which will settle the market at 12:00 UTC on 20 July 2026, and any deviation from the 80–81°F range would represent a significant mispricing given the current 100% consensus on that bin [1]. With the settlement window closing soon, the value spot likely sits only if a rapid cool-down occurs, though current forecasts and recent heatwave patterns support the crowd’s heavy weighting on the upper range.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Los Angeles on July 20? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Who Will Win 2026, which mirrors the Polymarket order book at 0% fees.

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 Who Will Win 2026. 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.

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.

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 Who Will Win 2026 trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.