Highest temperature in Wellington on July 8?

Platform comparison

Market context

The real-world event concerns the highest temperature recorded at Wellington International Airport on 8 July 2026, measured in degrees Celsius, with settlement tied to Wunderground data. Current crowd-implied probability for a "YES" outcome sits at 0%, suggesting the market expects the temperature to fall outside the specific range being bet on, likely due to typical early-July conditions in Wellington.

Historical patterns frame this probability clearly: early July in Wellington typically sees daytime highs between 11°C and 15°C, with summer averages rising from 65°F to 69°F (roughly 18°C to 21°C) by peak season[3][4]. Given that the settlement date is in mid-winter for New Zealand, temperatures are unlikely to exceed 16°C, making ranges above that effectively impossible and explaining the 0% implied probability for higher outcomes[4].

Traders should monitor real-time weather updates from the National Weather Service and BBC Weather for shifts in wind speed, rain intensity, or pressure trends that could briefly elevate temperatures[1][2]. Recent forecasts indicate strong winds and rain with a current reading of 15°C and rising pressure, which may suppress any unexpected warmth[2]. No major announcements are scheduled, but continuous observation of Wunderground’s hourly logs will be critical as the settlement window approaches[5].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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.