Highest temperature in Hong Kong on July 16?

Platform comparison

Market context

Heavy rain and a thunderstorm warning issued just before 5:20 am HKT have already capped early morning temperatures at 26°C, making the current 0% YES probability for high-temperature outcomes a direct reflection of today’s unsettled start. Widespread rainfall across districts like Sham Shui Po (11–22 mm) and Kwai Tsing (5–21 mm) confirms active cloud cover that will suppress peak heat, aligning with the Hong Kong Observatory’s forecast of a maximum around 29°C in urban areas [1][4].

Historically, July 16 days with similar pre-dawn thunderstorm activity in Hong Kong rarely exceed 30°C, with the 9-day forecast explicitly capping today’s range at 26–29°C and noting “mainly cloudy with occasional showers” [4]. The market’s frontrunner of 29°C at 39% probability and 30°C at 28% reflects this thermal ceiling, as El Niño conditions expected later in summer have not yet overridden the current southwesterly airstream that brings persistent showers [5][2].

Traders should monitor the thunderstorm warning’s expiry at 7:30 am and the Observatory’s 16:15 HKT forecast update for any shift toward “very hot” conditions later in the day [1][3]. The key dependency is whether the outer subsiding air of Severe Typhoon Bavi, currently 790 km southeast of Taipei, weakens sufficiently to allow sunny intervals and a temperature rise beyond 29°C [3]. If the warning lifts cleanly and cloud cover breaks by midday, the 30°C outcome could gain traction, but heavy initial showers suggest the 29°C cap remains the most probable resolution.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Hong Kong on July 16? 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 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.

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 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.