Highest temperature in Hong Kong on July 2?

Platform comparison

Market context

Hong Kong is expected to hit a daily maximum of 28–33°C today under sunny periods, with the Hong Kong Observatory confirming this range for 2 July 2026[6]. The crowd-implied probability of 0% for a “YES” outcome on a specific high-temperature range appears inconsistent with Polymarket data, which currently assigns 45% to 32°C and 28% to 33°C as the frontrunners[1]. This divergence suggests the market is actively pricing in a high chance of temperatures reaching at least 32°C, not ruling it out.

Historically, July in Hong Kong averages 32°C, with daily highs typically ranging from 28°C to 32°C during summer months[5]. The 2026 seasonal forecast from the Hong Kong Observatory indicates normal to above-normal temperatures for July–September, driven by rising sea surface temperatures in the equatorial Pacific and an emerging El Niño event expected by late summer[4]. This climate backdrop supports the likelihood of temperatures exceeding the 30°C threshold, aligning with the 45% Polymarket probability for 32°C[1].

Traders should monitor the Hong Kong Observatory’s finalised “Daily Extract” for the absolute daily maximum temperature, which will be published after 2 July data is confirmed[4]. The key catalyst is the official release of the “Absolute Daily Max (deg. C)” figure, expected once the relevant daily extract is finalized. No new weather announcements are scheduled, but the El Niño development and long-term warming trend remain critical contextual factors influencing temperature outcomes[4]. The settlement window ends 12:00 UTC on 2 July 2026, so timely access to the finalised data is essential[4].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Hong Kong on July 2? 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 Prediction Today. 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'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.

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.