Wellington July 27 High Temperature Market: Eleven Degrees Favored

Wellington’s weather market has made up its mind. The contract pricing an eleven-degree Celsius high for July 27 sits at seventy-seven cents, implying a seventy-six-and-a-half percent probability. That is not a tentative lean. That is a market that has done the meteorological math and landed firmly on one outcome. The interesting question now is what would have to go wrong for it to miss.

The market question asks: what will the highest temperature in Wellington be on July 27? The eleven-degree outcome trades at $0.77 YES and $0.24 NO. Alternative outcomes include ten degrees, twelve degrees, nine degrees, eight degrees, thirteen degrees, and a range of others from five degrees or below up to fifteen degrees or higher. The market resolves on July 27 at 12:00 UTC. Total volume stands at $58,942, with $35,827 traded in the last twenty-four hours.

How the Eleven-Degree Contract Works

A YES resolution requires Wellington’s official highest temperature on July 27 to hit exactly eleven degrees Celsius, as determined by the resolution source. Nothing above or below satisfies this contract. Wellington sits at approximately forty-one degrees south latitude, and late July is deep Southern Hemisphere winter. Daily highs in the range of nine to thirteen degrees are typical for this time of year. The market has concentrated probability on eleven degrees as the single most likely outcome in that band.

• YES ($0.77): Wellington records a high of exactly eleven degrees Celsius on July 27.
• NO ($0.24): Wellington records any temperature other than eleven degrees as its daily high on July 27.

The NO side covers every other outcome on the board, from five degrees or below through fifteen or higher. A high of ten degrees would be enough. So would twelve. The NO contract pays when the actual high lands anywhere outside the eleven-degree mark. Wellington’s winter highs can shift by two or three degrees based on frontal passage or a break in cloud cover. That residual uncertainty is what keeps the NO price above zero.

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Momentum and Market Signals

The momentum picture here is hard to ignore. The eleven-degree contract gained eighteen-and-a-half percent over the last twenty-four hours, with the trend score sitting at 48.01. That kind of sustained directional move, concentrated in a single day, points to fresh meteorological data driving conviction. A weather model update or forecast revision toward eleven degrees would explain this price action cleanly. The market is pricing updated forecast information, not lingering uncertainty.

Total volume of $58,942 is modest for a prediction market, and $35,827 of that landed in the last twenty-four hours alone. Liquidity sits at $59,678. With volume below one million dollars, a single large trade can move this price meaningfully. The market is thin. The strong directional signal is real, but the price is more sensitive to new information than a deep-liquidity market would be.

• The one-hour price change of zero percent suggests the market has stabilized after yesterday’s large move, with no new data disrupting the current consensus.
• The twenty-four-hour gain of eighteen-and-a-half percent reflects a sharp repricing event, most likely tied to a forecast model update narrowing the range toward eleven degrees.
• The trend score of 48.01 sits in moderate territory, consistent with a market that has moved decisively but is not yet at maximum conviction.
• Thin liquidity means any new forecast data pointing toward ten or twelve degrees could push the NO side quickly.
• The thirty-dollar-high-thirty-day-price matches the current price, confirming this is the peak of market confidence so far.

Lines Analysis: Wellington in Winter

Wellington in late July averages daily highs in the ten-to-twelve degree range. The market’s concentration on eleven degrees reflects the statistical center of that distribution, sharpened by recent forecast data. New Zealand’s MetService issues hourly-updated forecasts for Wellington. When those models converge on a specific temperature, prediction markets respond exactly as this one has, with a sharp repricing toward the most probable outcome. The data right now points to eleven degrees as the forecast consensus.

What makes the NO side real is Wellington’s notorious wind variability. The city sits at the southern tip of the North Island, exposed to Cook Strait. A northerly wind shift can push temperatures a degree or two higher than forecast. A southerly surge can knock them down just as fast. The twelve-degree and ten-degree contracts are absorbing the probability mass that eleven degrees cannot claim. Those alternatives are not long shots. They are the tails of a tight forecast distribution.

• MetService Wellington forecast updates in the next twelve to eighteen hours will be the primary price driver for this contract.
• A southerly front accelerating through Cook Strait before noon on July 27 would push the high toward nine or ten degrees and reprice the NO side sharply.
• Clear conditions and a northerly component could lift the high to twelve degrees, benefiting that alternative contract at the expense of eleven degrees.
• The resolution timestamp of 12:00 UTC (midnight local New Zealand time, effectively end of the calendar day) means the full day’s temperature range is captured.
• Any significant deviation in the GFS or ECMWF model runs tonight would likely move this contract before resolution.

The $58,942 in total volume, with more than sixty percent arriving in the last twenty-four hours, confirms traders are actively updating on new information. The data favors the eleven-degree outcome as of July 26. The remaining twenty-four percent on the NO side represents genuine meteorological uncertainty, not market error.

LINES VERDICT

FAVORED BUT WATCH THE FORECAST

The eleven-degree contract has absorbed the majority of conviction in this market because the forecast data points there. Here’s what the measurements are telling us: Wellington’s winter high is tightly bounded, and the models have spoken.

What the market says: A seventy-six-and-a-half percent implied probability reflects strong but not overwhelming consensus on eleven degrees. Thin liquidity means this price can shift fast if MetService updates the forecast before July 27 noon resolution.

Key unknown: The next MetService Wellington forecast update is the single event that could reprice this contract. A one-degree shift in the predicted high, toward ten or twelve degrees, would drain probability from the eleven-degree outcome immediately.