Highest temperature in Wellington on August 9?

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Market context

A wet, breezy start has kept Wellington pinned close to its cool August baseline, with current forecasts clustered around 10–12°C and only limited daytime warming expected. That matters for this market because the settlement depends on the **highest observation recorded at Wellington International Airport** in the Weather Underground Daily Observations table, not the higher or lower summary figure shown elsewhere, so the intraday peak is the number to watch rather than the day’s headline range.[2][3][13]

For context, Wellington’s August climate is usually stable and cool, with average highs around 12°C and many forecasts this week sitting only a degree or two above or below that mark.[1][7][10][18] AccuWeather’s August outlook shows daily highs in the low teens Celsius, and current day-ahead forecasts point to rain or drizzle early, then cloud breaks or partial clearing later, which is the kind of pattern that can still produce a brief midday maximum even when the day feels unsettled.[1][4][6] Weather Underground’s own history page for 9 August shows a high around 54°F, which is roughly 12°C, broadly consistent with the wider seasonal norm.[8]

Traders should watch the airport observation feed through the local afternoon, when temperature maxima are usually set, alongside any short-lived sun breaks, wind shifts or drying after morning rain that could nudge the reading above 12°C.[4][5][13] The main dependencies are straightforward: if the cloud deck holds and onshore wind stays brisk, the ceiling for the day’s high is limited; if skies open earlier than forecast, a one- to two-degree overshoot becomes more plausible.[3][9][17]

Sources: 1 · 2 · 3 · 4 · 5

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