Highest temperature in Taipei on July 31?

Platform comparison

Market context

Taipei’s temperature is being decided by the day’s peak reading at Songshan Airport, and the immediate backdrop is already hot: Focus Taiwan reported the Central Weather Administration had issued an orange heat advisory for Taipei after daytime temperatures topped 36°C for a third straight day. That makes the market’s 0% crowd-implied YES price look detached from live conditions, because the settlement trigger is not a generic city average but the single highest Celsius reading recorded at the station through the close of the window.[1]

The historical frame still matters because late July in Taipei is normally warm to very hot, with typical highs around 33-36°C and published July records reaching about 38°C, so the relevant question is whether the day finishes in an ordinary upper-summer band or pushes into a rarer extreme. Comparable weather profiles show that 31 July often sits near the upper end of the monthly range, which means traders usually focus on whether the afternoon peak can exceed the low-to-mid 30s by enough to shift the settlement bucket.[4][10][12]

For catalysts, the key inputs are the midday and afternoon CWA updates, local convection or rain bands, and any late-day surge in heat before the station’s daily maximum is locked in. Because the market settles in USDC on-chain, there is no dependence on fiat rails, but the main risk remains basis between what the city feels like and what the Songshan Airport station records; in broader crypto terms, BTC and ETH direction only matters indirectly through market-wide risk appetite, not the weather outcome itself.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reads Highest temperature in Taipei on July 31? 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.

Why USDC and not ETH or USDT?

USDC is the Polygon standard — audited reserves (Circle, monthly attestation), deepest order book, low gas costs. ETH volatility would distort probability quotes; USDT has thinner Polygon liquidity than USDC.

What does a transaction cost on Polygon?

Polygon gas is typically under $0.01 per transaction. A full trade cycle (Approve + Order + Fill) totals around $0.03 — compared to $5-50 on Ethereum mainnet.

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.