Highest temperature in Wellington on June 30?

Platform comparison

Market context

Wellington is currently under a tight, dry southwesterly flow with cloud-free skies and light winds, suppressing daytime heating as the settlement clock ticks down for the 30 June high-temperature resolution. The crowd-implied 0% probability for any temperature above the frontrunner reflects a near-lock on late June climatology, where typical daily highs hover near 12°C under average seasonal conditions with no strong signals for significant warmth[2].

Historical patterns from NIWA’s April–June 2026 outlook confirm temperatures are most likely near average (45% chance), with cold snaps more common in the latter outlook period and onshore airflows occasionally suppressing daytime peaks in eastern regions like Wellington[3]. This aligns with the current market frontrunner of 12°C at 100% probability, while outcomes below 6°C or above 16°C remain negligible, mirroring the low volatility seen in comparable late-June cases[2][5].

Traders should monitor MetService’s daily updates for any sudden shift to northerly rainmakers or storm systems, as recent storm activity in Wellington already caused hundreds of flight cancellations and disrupted weather patterns[7]. The Southern Oscillation Index has just crossed into weak La Niña territory, but models forecast a return to ENSO-neutral conditions, meaning short-term variability will dominate temperature outcomes[3]. Watch for any announcement of a dominant weather pattern change expected in winter, which could alter confidence in the 12°C resolution[3].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Prediction Today, which mirrors the Polymarket order book directly.

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

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Prediction Today. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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.

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.