Wellington July 6 High Temp: Thirteen Degrees at 51%

Wellington’s winter forecast for July 6 has produced one of the tightest prediction market splits you’ll find in a weather contract. The 13°C outcome sits at 51% implied probability, a near coin-flip against a field of ten competing temperature bands. With two days until resolution, the market is pricing genuine meteorological uncertainty rather than a settled forecast. Here’s what the measurements are telling us.

The market asks: what will be the highest temperature in Wellington on July 6? The 13°C outcome trades at $0.51 YES and $0.49 NO. The contract resolves at noon on July 6, 2026. Total volume stands at $8,117, all of it placed in the last 24 hours, which tells you this market opened recently and traders moved quickly.

How the Wellington Temperature Contract Works

YES pays out if Wellington’s official maximum temperature on July 6 lands exactly at 13°C. NO pays out if any other temperature band resolves as the winner. The remaining ten outcomes (8°C or below through 18°C or higher) each carry their own YES/NO markets, so this is a multi-outcome format where capital disperses across bands.

• YES at $0.51 implies a 51% chance the July 6 high lands at 13°C.
• NO at $0.49 implies a 49% chance any other temperature wins.

A NO outcome here doesn’t require a dramatic cold snap or heat surge. Wellington’s July daily maximum only needs to land at 12°C or 14°C to invalidate the 13°C contract. The margin is a single degree in either direction. That’s a thin band for a city known for rapid weather shifts driven by the Cook Strait.

Momentum and Market Signals

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The momentum composite is essentially flat. The 1-hour price change is zero, and the trend score of 44.08 sits just below neutral. The entire $8,117 in total volume moved in the 24 hours before this writing, which means the market opened cold and attracted a burst of early positioning. No sustained directional pressure has emerged since.

Liquidity of $54,082 is strong relative to the $8,117 traded so far. The order book can absorb new capital without significant price slippage. Volume remains well below $1 million, though, so a single informed trader acting on a fresh weather model update could shift the price sharply before the July 6 noon resolution.

• The 1-hour price change is flat at zero, with no fresh catalyst driving movement.
• The 24-hour price move is not available, but volume data confirms all $8,117 entered the market in the last 24 hours.
• A trend score of 44.08 reflects mild bearish lean relative to neutral 50, despite the YES price holding above $0.50.
• Liquidity at $54,082 exceeds volume by a factor of nearly seven, meaning the market has depth but not yet conviction.
• Wellington’s weather during July is governed by Southern Ocean fronts. A single frontal passage can swing the daily maximum by 3°C to 5°C.

Lines Analysis: Wellington Winter Temperatures

The 13°C band wins this market if Wellington’s July 6 maximum sits at a moderately mild winter day. Wellington’s July average high runs close to 12°C based on historical climatology for the city. A 13°C reading sits one degree above that average, which is achievable under light northerly flow but not the default outcome. The market pricing it at 51% reflects a reasonable meteorological prior: slightly above-average days occur frequently, but no single degree band dominates Wellington’s winter distribution.

The competing bands are the real threat here. The 12°C outcome is the most logical rival, sitting at the statistical center of Wellington’s July range. A colder southerly outbreak pushes toward 11°C or 10°C. A stronger-than-expected northerly surge could deliver 14°C or 15°C. The data doesn’t care about the politics of which band wins. What matters is that Wellington’s Cook Strait exposure means forecast uncertainty at the two-day range is genuinely high.

• Any shift in the GFS or ECMWF model runs for July 6 pointing toward 12°C or 14°C would reprice the competing contracts and pull capital away from the 13°C band.
• A southerly front arriving earlier than forecast could push the 12°C, 11°C, or 10°C bands higher.
• A ridge of high pressure holding over the North Island longer than expected would favor 14°C or 15°C outcomes.
• MetService New Zealand’s official July 5 forecast update will be the single most important data point before resolution.

The $8,117 in total volume is thin for a two-day weather contract. The market is pricing uncertainty, not science. The data currently available favors 13°C as the modal outcome, but the margin over the next most likely band is too narrow to call settled. Any trader here is essentially betting on a one-degree forecast window 48 hours out in one of the windiest capitals in the world.

LINES VERDICT

TOO CLOSE TO CALL

Wellington’s meteorological profile makes the 13°C band a defensible favorite, but a one-degree margin against a ten-outcome field is razor thin with 48 hours of forecast uncertainty remaining.

What the market says: At 51% implied probability, the market has essentially no edge priced into 13°C over its nearest rivals. Volume is thin and liquidity is deep, meaning a single weather model shift before the July 6 noon resolution could reprice this contract sharply.

Key unknown: MetService New Zealand’s updated July 5 point forecast for Wellington’s maximum temperature is the single data release that will settle directional conviction in this market before resolution.