Highest temperature in Milan on August 17?

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Market context

Milan's weather on 17 August 2026 will be assessed using the highest temperature recorded at Malpensa International Airport's weather station, with data sourced from Weather Underground's Daily Observations table rather than summary figures. The settlement window closes at midday UTC on that date, meaning afternoon temperature spikes after 12:00 will not factor into the resolution.

August temperatures at Malpensa typically range between 24–30°C, with extreme heat events pushing above 32°C occurring roughly once per decade in the Lombardy region. The current 4% implied probability suggests the market is pricing in a notably high threshold—likely above 35°C—which would represent a significant departure from typical late-summer conditions. Historical data from the past fifteen years shows only three instances where Milan recorded temperatures exceeding 34°C in mid-August, each coinciding with sustained high-pressure systems from North Africa.

Traders should monitor European weather models from mid-August onwards, particularly the position of the Azores high-pressure system and any tropical air masses moving northward from the Mediterranean. The UK Met Office and ECMWF forecasts typically become reliable five to seven days ahead of the target date. Any early-August heat waves affecting southern Europe would serve as an indicator of whether atmospheric conditions favour extreme temperatures by mid-month, though August weather patterns can shift rapidly. Real-time station data from Malpensa will become the definitive reference once the date approaches, superseding all forecast models at settlement.

Methodology

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