Weather in Seoul for June 2025

Seoul, South Korea, experiences a transition in weather during June, marking the shift from late spring to early summer. At the beginning of the month, the weather is generally mild and pleasant.

Daytime temperatures typically range from 18° to 24°, while nighttime temperatures can drop to around 14° to 18°. The skies are often clear or partly cloudy, making it an ideal time for outdoor activities and sightseeing.

As the month progresses, the weather starts to warm up significantly. By mid-June, daytime temperatures can rise to between 22° and 28°, with nighttime temperatures hovering around 18° to 22°. Humidity levels also begin to increase, making the air feel warmer and more humid.

Towards the end of June, Seoul starts to experience the onset of the East Asian monsoon season, known locally as "jangma." This brings a noticeable increase in rainfall and humidity. Daytime temperatures can reach up to 30°, while nighttime temperatures remain relatively warm, around 22° to 25°.

Rain showers become more frequent, and occasional thunderstorms are not uncommon. The increased humidity can make the weather feel quite muggy, so it's advisable to carry an umbrella and wear light, breathable clothing.

Overall, June in Seoul offers a mix of pleasant early summer weather and the beginning of the monsoon season, providing a diverse range of experiences for visitors.

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