Highest temperature in Wellington on July 25?

Platform comparison

Market context

Wellington's maximum temperature on 25 July 2026 will be recorded at the international airport weather station and resolved against historical data from Wunderground. July falls within Wellington's winter season in the Southern Hemisphere, when daytime highs typically range between 10–13°C, though the city's exposed coastal location and variable weather patterns mean single-day extremes can deviate meaningfully from seasonal norms.

The 0% implied probability reflects the market's current state rather than genuine forecasting consensus. Wellington's winter temperatures have historically produced daily maxima below 15°C in roughly 80% of July observations, with readings above 18°C exceptionally rare during this month. However, the settlement window extends to mid-2026, leaving eighteen months for market participants to assess seasonal forecasts and climate patterns. The absence of trading activity suggests insufficient liquidity rather than certainty about temperature ranges; early traders typically establish positions across multiple brackets before the event window narrows.

Traders should monitor New Zealand's meteorological forecasts as mid-2026 approaches, particularly any signals from the National Institute of Water and Atmospheric Research regarding winter severity and anomalies. El Niño or La Niña conditions in the preceding months could shift Wellington's typical temperature distribution. The airport station's consistent measurement protocols and Wunderground's reliable historical archive provide transparent resolution criteria, reducing dispute risk. Value may emerge once seasonal outlooks crystallise and competing temperature brackets attract differentiated positioning.

Methodology

This page reviews Highest temperature in Wellington on July 25? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Who Will Win 2026, which mirrors the Polymarket order book at 0% fees.

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

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

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.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

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.