Highest temperature in Beijing on August 4?

Platform comparison

Market context

Beijing’s high on 4 August will be set by the *single highest reading* recorded at Beijing Capital International Airport Station, not by the citywide average, so short-lived heat spikes matter more than the day’s “feels like” temperature. That makes a 0% implied probability for the YES band unusually conservative for a late-summer Beijing session, because August is typically hot enough for midday maxima in the low-to-mid 30s Celsius, with some forecasts and climate guides placing early-August highs around 31–36°C and noting humidity, showers and thunderstorms can either cap or delay the peak.[1][3][4][11][16][17]

Comparable August forecasts for Beijing commonly cluster around 30–32°C for the daytime maximum, with some models pointing higher on hotter days and others cutting back temperatures when rain is expected.[1][3][4][6][7][13][15][16] In market terms, that means the current price needs to be read against a weather distribution that is broad rather than fixed: a cool, cloudy, rainy outcome can keep the print in the high 20s, but a break in cloud cover or delayed convection can still produce a 33–35°C airport high, which is the kind of range that tends to drive settlement in these banded temperature contracts.[2][3][12][17]

Traders should watch the latest airport-area forecast updates, not just the city forecast, because convective timing and precipitation intensity can change the eventual peak temperature by several degrees. The contract settles in USDC on-chain, so the main mechanics are binary exposure to the recorded Wunderground station value rather than a discretionary oracle narrative; for broader crypto context, BTC and ETH spot direction, funding rates, and whale flows can still affect risk appetite and liquidity in the market book, but they do not change the weather outcome itself. Any late revision to the observation feed before the settlement window closes is the operational catalyst most likely to matter.[12]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reads Highest temperature in Beijing on August 4? on-chain. Polymarket's quote comes directly from the Polygon order book — the only comparable venue with on-chain settlement. Kalshi (USD, off-chain), Betfair (GBP/EUR, off-chain) and Manifold (play-money) are listed alongside for venue context. Every CTA routes to BTC Prediction, which mirrors the Polymarket order book directly.

Resolution & payout

Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.

Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.

FAQ

What are crypto prediction markets?

Crypto prediction markets are on-chain smart contracts where you buy YES or NO shares on a future crypto event (e.g. "BTC above $100k by year-end"). The market price between 0¢ and 100¢ is the implied probability.

Can I use Bitcoin directly?

No, Polymarket operates exclusively in USDC on Polygon. You can bridge BTC to USDC via an exchange or bridge service and deposit on Polygon — typically 10-30 minutes processing time.

How volatile are crypto prediction markets?

Crypto markets react to spot prices — a 5% BTC move typically shifts a "BTC above X by date" market 10-20%. Polymarket crypto market liquidity is usually six-figure USD, sufficient for active trading.

Which crypto markets exist on Polymarket?

Currently active markets include BTC/ETH/SOL price targets, halving dates, ETF approvals, hard-fork outcomes and Layer-2 TVL thresholds. The list updates weekly; biggest volume sits on BTC and ETH price forecasts.

Are crypto prediction markets taxable in the US?

In the US, prediction market gains are typically treated as ordinary income or short-term capital gains depending on holding period. Consult a tax professional for your specific situation — we cannot provide tax advice.