Highest temperature in Wellington on July 28?

Platform comparison

Market context

The contract settles against the highest temperature recorded at Wellington International Airport on 28 July, with the payoff determined by which Celsius range Wunderground logs for the day. With the crowd currently pricing **0% YES**, the market is implying that the exact outcome has not yet attracted any visible conviction, which often happens when the event is still beyond the immediate forecast window and the terminal reading is not yet anchored by a late-day high.

Wellington’s July climate is typically cool, windy and rain-prone, with forecast and climatology sources pointing to highs around **12°C** and regular precipitation through the month.[1][2] That makes the upper part of the distribution relatively compressed: a 10–12°C outcome is more consistent with the prevailing winter pattern than a sharp warm spike, while a print above the mid-teens would require an unusually mild air mass or strong sunshine and offshore flow. Recent national conditions also show New Zealand winters can still generate isolated warm outliers, but the 2025 July summary’s top reading of **22.7°C** was far above what is normal for Wellington.[3]

For traders, the main watchpoints are the final Wellington forecast updates, any sudden shift in wind direction or cloud cover, and the timing of the day’s maximum temperature, which can arrive after local midday if sunshine breaks through later. Because settlement is on a specific Wunderground station reading, the relevant dependency is the airport observation rather than broader city forecasts. In crypto market terms, the position’s mark-to-market should remain closely tied to on-chain liquidity and USDC settlement mechanics, but there is no obvious BTC or ETH macro driver unless broader risk sentiment spills into venue-wide pricing; Polymarket-style contracts resolve directly against the published outcome, so late repricing is usually driven by updated weather data rather than spot crypto moves.[4]

Sources: 1 · 2 · 3 · 4

Methodology

This page reads Highest temperature in Wellington on July 28? 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.

How does UMA secure the resolution?

The UMA Optimistic Oracle uses a bond system: a proposer posts a bond, a two-hour challenge window opens. On dispute the losing side forfeits the bond — financial incentive for honest resolution.

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.

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.