Highest temperature in Shenzhen on August 18?

Platform comparison

Market context

This market resolves on the highest temperature recorded at Shenzhen Bao'an International Airport on 18 August 2026, measured in degrees Celsius and sourced from Weather Underground's Daily Observations table rather than summary figures.

Shenzhen's August climate is consistently hot and humid, with historical daily highs typically ranging between 32°C and 34°C during mid-August. The city experiences its peak summer season at this time, with occasional spikes above 35°C during particularly intense heat events. The current 0% probability assigned to the YES outcome suggests the market is pricing in a temperature threshold substantially above typical August conditions—likely in the 36°C+ range or higher. Examining Weather Underground's historical records for Shenzhen Bao'an from previous Augusts provides the most reliable baseline for assessing whether the specified temperature range represents an outlier event or a plausible occurrence.

Traders should monitor tropical weather systems and monsoon patterns developing across the South China Sea in the weeks preceding mid-August 2026, as these can either suppress temperatures through cloud cover and precipitation or intensify heat through stalled high-pressure systems. The China Meteorological Administration typically issues seasonal forecasts by late July that may indicate whether August 2026 is tracking toward above-normal or below-normal temperatures. Any El Niño or La Niña conditions active during that period could influence regional heat patterns. The settlement window closes at 12:00 UTC on 18 August, so traders will need confirmation from Weather Underground's Daily Observations table within hours of market close.

Methodology

Political prediction markets differ structurally from sports betting: thinner liquidity, longer settlement windows, higher sensitivity to single news events. This page shows the live Polymarket quote for Highest temperature in Shenzhen on August 18? plus platform attributes for the three reference venues, so you can see at a glance where the deepest market for this question sits.

Resolution & payout

Political markets typically settle on official candidate or agency confirmation. Polymarket uses UMA Optimistic Oracle: a proposer posts the outcome with a bond, the two-hour window opens, then the smart contract pays USDC.

Kalshi settles USD via CFTC clearinghouse, with clearly defined resolution sources (e.g. AP race calls for elections). Betfair settles after the official outcome is registered with the league or agency. Manifold is play-money.

UK Frequently Asked Questions

What resolution source is used for elections?

Polymarket defines the source per contract — usually Associated Press (AP Race Call), Reuters or the official electoral commission. The source is stated in contract details before the market opens.

Can prediction markets influence election outcomes?

Markets reflect expectations rather than create them. Studies show public-facing markets can anchor expectations, but don't influence the underlying outcome. Political markets are information, not advocacy.

Which platform has the deepest political liquidity?

Polymarket — by far. US 2024 presidential volume was ~$3.5B vs Kalshi (~$200M) and Betfair (~$120M). Where Polymarket is geo-blocked, brokers like Trump Prediction route into the same order book at 0% fees.

Why do Polymarket and Kalshi differ on elections?

Kalshi must follow CFTC compliance — strict definitions, clear resolution sources, US citizens only with KYC. Polymarket operates globally without CFTC oversight — deeper liquidity, but also higher regulatory risk.

Are UK election prediction markets available from the UK?

Yes. Betfair Exchange and Smarkets offer UKGC-regulated UK election markets (seat counts, party share, constituency results). Polymarket also lists UK election contracts with deeper global liquidity. Betfair winnings are typically tax-free for UK individuals; Polymarket profits are subject to HMRC CGT.