Highest temperature in Shenzhen on August 5?

Platform comparison

Market context

Shenzhen’s **highest temperature on 5 August** is being priced as a near-certainty for the *under* side, with the market’s implied probability of **YES at 0%** and the crowd effectively assuming no upside surprise. In handicapper terms, that makes the favourite the outcome landing in one of the lower Celsius bands, while any **YES** requires an unusually hot reading at Shenzhen Bao’an International Airport Station by the settlement cut-off. August in Shenzhen is normally hot and humid, but not a place where extreme daytime spikes are the base case: long-run August highs are around 89–91°F, or roughly 32–33°C, with some forecasts pointing to daily highs in the low 30s Celsius and heavy rain risk rather than heat extremes.[1][2][14][20]

Historically, that leaves the value discussion focused on whether the consensus is underestimating a brief clear-sky surge or overpricing the downside after recent rainfall expectations. Comparable August guidance for Shenzhen consistently clusters around low-30s Celsius highs, with multiple climatology sources showing typical daily highs near 31–33°C and frequent rain through the month, which usually caps runaway maximum temperatures.[2][6][16][19] On that framing, the crowd’s 0% YES looks like an aggressive favourite on the “no extreme heat” view; the contrarian angle is not a broad heatwave call, but a specific bet on a single hot afternoon if cloud cover breaks and the day turns sunnier than model guidance suggests.[1][2][14]

For traders, the main catalysts are the same ones that move any Shenzhen summer temperature tape: cloud cover, rain timing, and whether convection or typhoon-adjacent moisture keeps afternoon highs suppressed. Today’s published forecasts lean towards rain or patchy rain with highs around 31–33°C, which supports the consensus that the upside is limited rather than explosive.[2][7][19] The real watchlist is the day-of evolution in forecast highs on local weather services and the Wunderground station readout, because a small change in sunshine or rainfall timing can decide which Celsius bucket settles first.[1][13]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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. 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.

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.

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.