Highest temperature in Hong Kong on July 11?

Platform comparison

Market context

Forecasts from the Hong Kong Observatory and climate models now point to a maximum temperature of 32–35°C for 11 July 2026, driven by typical midsummer conditions and an emerging El Niño event that is pushing regional temperatures above normal[1][4]. The current crowd-implied probability of 0% YES appears misaligned with this outlook, as the market’s frontrunner outcome is 34°C at 40%, with 35°C next at 27%[1]. This suggests traders are pricing in a high likelihood of temperatures reaching the upper end of the summer range rather than ruling out heat entirely.

Historically, July and August are Hong Kong’s hottest months, with average temperatures around 32°C and frequent peaks into the mid-30s during periods of above-normal warmth[5]. The ongoing rise in equatorial Pacific sea surface temperatures is forecast to develop into a strong El Niño by late summer, a pattern that has consistently correlated with higher July temperatures in Hong Kong over recent decades[4]. Given this backdrop, a 0% probability for any meaningful heat outcome contradicts both seasonal norms and the current seasonal forecast indicating normal to above-normal temperatures[4].

Traders should monitor the Hong Kong Observatory’s daily weather outlook updates, particularly the forecast issued for 11 July, which currently predicts a range of 29–35°C with low rain probability[10]. The key catalyst is the finalisation of the “Daily Extract” data from the Observatory, which will provide the official “Absolute Daily Max” needed for settlement[1]. Any shift in the 48-hour forecast toward the upper end of the 32–35°C band, or confirmation of stronger El Niño intensity, could rapidly reprice the market away from the current 0% implied probability[1][4].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Hong Kong on July 11? 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 Prediction Today, which mirrors the Polymarket order book at 0% fees.

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

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's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

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 Prediction Today 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.