Highest temperature in Seoul (Incheon) on August 6?

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Market context

A sharp heat build-up over the last 24–48 hours leaves Seoul and the airport corridor under a severe heat warning, with forecasters pointing to around 39°C for the capital area and 38°C for Incheon today. That is the key change for this market: the near-term pattern has shifted from simply warm August weather to an extreme heat episode, which makes a high outcome far more plausible than the current 0% implied probability suggests.[2][3]

For context, early August is normally one of Seoul’s hottest periods, and climatology already leans towards elevated highs around the mid-30s Celsius in Fahrenheit terms. WeatherSpark notes that the highest daily average high in Seoul falls on 6 August at about 85°F, while AccuWeather’s August forecast shows highs clustered in the low-to-upper 80s Fahrenheit, reinforcing that this is a seasonally hot window even before any heatwave signal.[1][13] In that setting, a reading near or above 38°C at Incheon is not a fringe outcome if inland heat mixes down to the coast.

Traders should watch the official short-range guidance from the Korea Meteorological Administration, plus any updates on heatwave warnings, coastal cloud cover, sea breeze strength, or afternoon showers that could cap the daily maximum. SBS and Asiae both report that the current hot spell is expected to persist through today, with only a modest easing later in the week, so the main risk to the upper end is a localised cooling influence rather than a broad change in the synoptic pattern.[2][3][4]

Sources: 1 · 2 · 3 · 4 · 5

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