Wellington July 9 High Temp: 11°C at Nearly Even Odds

Wellington in July is notoriously hard to pin down. The New Zealand capital sits at the southern tip of the North Island, exposed to Cook Strait winds that can swing daily highs by several degrees within a single weather system. The market has priced the 11°C outcome at 47.5% for July 9, but with a one-hour drop of 3.5% and a trend score of 40.43, conviction is thin and sliding.

The market question asks: what will Wellington’s highest temperature be on July 9, 2026? The 11°C contract trades at $0.48 YES and $0.53 NO. The market closes July 9 at 12:00 UTC. Total volume sits at $8,251, all of it traded in the last 24 hours. That thin activity means a single new forecast or a sharp weather update can move this price fast.

How the Wellington July 9 Temperature Contract Works

This is a winner-take-all market against a specific temperature outcome. YES on 11°C pays out only if Wellington’s official highest temperature on July 9 lands exactly at 11°C. Any other reading, whether 10°C, 12°C, or outside that range, means the 11°C contract expires worthless. The full outcome ladder runs from 5°C or below through 15°C or higher, covering every plausible winter reading.

• YES on 11°C: $0.48, implying a 47.5% chance the daily high lands exactly at that mark.
• NO on 11°C: $0.53, implying a 52.5% chance any other temperature takes the day.

The NO side wins when Wellington’s maximum temperature registers anything other than 11°C. That covers nine other active outcomes. Wellington’s July climate centers on a daily high range of roughly 10°C to 13°C, meaning the probability mass is spread across several adjacent contracts, not concentrated in one. The 11°C contract competes directly with 10°C and 12°C for the same trading capital.

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Momentum and Market Signals

The momentum composite points modestly negative. A 3.5% one-hour price drop with a trend score of 40.43 suggests traders are trimming the 11°C position, possibly in response to updated forecast models shifting the expected high slightly warmer or cooler. No 24-hour baseline is available, so the one-hour move is the clearest directional signal right now.

Total volume is $8,251, all within the past 24 hours. Liquidity sits at $79,073, which is deep relative to volume. That liquidity depth means the order book can absorb larger bets without dramatic price swings, but the current thin trading volume means this market is still price-discovering. Volume under $1 million signals that price can move sharply on any new meteorological input before July 9 closes.

• The 1-hour price change of -3.5% and trend score of 40.43 combine into a mild bearish signal for 11°C, likely tracking a forecast model update.
• Total volume of $8,251 is low, making this contract sensitive to any single large trade or updated weather guidance.
• Liquidity of $79,073 is healthy relative to volume, so the spread reflects genuine uncertainty rather than illiquidity.
• The 47.5% YES price reflects a market pricing uncertainty across a tight temperature band, not a confident directional call.
• No whale trades have entered this market, leaving sentiment driven by smaller retail-scale positions.

Lines Analysis: Wellington’s Winter Range Is the Story

Wellington’s July climatology is the core driver here. The city’s winter daily highs cluster between 10°C and 13°C, with 11°C sitting near the center of that range. That positioning gives 11°C a natural probability advantage over the more extreme outcomes, which is why it carries the highest single-outcome price on the board. MetService, New Zealand’s national weather agency, issues daily forecasts for Wellington that traders are almost certainly tracking in real time.

The risk for 11°C holders is not an extreme weather event. The risk is a routine miss, one or two degrees in either direction. A 12°C outcome or a 10°C outcome would both resolve the 11°C contract as NO. Wellington’s exposure to northerly warm flows and southerly polar blasts means adjacent outcomes are genuinely competitive. The 11°C contract does not need unusual weather to lose. It just needs ordinary variability.

• A MetService forecast shift toward 12°C or 13°C before July 9 would likely push capital toward warmer contracts and reprice 11°C lower.
• A southerly outbreak bringing colder air would shift probability toward 9°C or 10°C outcomes, again at the expense of 11°C.
• Stable anticyclonic conditions over New Zealand would keep the high in the 11°C to 12°C band, supporting the current pricing.
• Any large trade entering the adjacent 12°C or 10°C contracts would signal that informed traders are shifting their temperature call.
• The July 9 resolution deadline means forecast confidence will increase sharply in the final 24 to 48 hours before close.

Total volume of $8,251 reflects a market still in price-discovery mode. The data favors neither side decisively. The 11°C outcome is climatologically central, but the spread across adjacent contracts means every other outcome collectively outweighs it. Here’s what the measurements are telling us: this is a coin-flip priced correctly, not a mispriced certainty.

LINES VERDICT

GENUINE TOSS-UP

The 11°C outcome sits at the climatological center of Wellington’s July range, which earns it the top single-outcome price. But Wellington’s variability and the competitive adjacent contracts make this a genuinely open question with no strong directional edge.

What the market says: At 47.5%, the market treats 11°C as the single most likely outcome while acknowledging it is still more likely to miss than hit. Thin volume means price can move sharply as the July 9 resolution date approaches and forecast precision increases.

Key unknown: The MetService 48-hour forecast for Wellington issued on July 7 and July 8 is the single data point that will reprice this contract. Any forecast landing at 12°C or 10°C will drain capital away from the 11°C position before close.

Scientific Context: Wellington’s Winter Temperature Profile

Wellington’s climate is classified as oceanic temperate. July mean daily highs run near 11°C to 12°C, with standard deviations of roughly two degrees either way. The Cook Strait channeling effect amplifies wind-driven temperature swings that do not appear in many other New Zealand cities. A single synoptic shift, a northerly bringing subtropical air or a southerly bringing subantarctic air, can move the daily high by three to four degrees relative to the mean. The data doesn’t care about the politics of which contract holds the most open interest. It cares about which pressure system dominates Cook Strait on July 9.

No significant climate anomaly data is available for this specific short-range forecast window. The market is pricing uncertainty, not science, at this resolution. The relevant input before July 9 is operational numerical weather prediction output, not climatological baselines.