Historical Weather in Seoul, South Korea
See 55+ years of weather history for any date in Seoul going back to 1970.
Look Up a Specific Date
Monthly Climate Averages
Historical temperature and precipitation averages for Seoul, South Korea, based on 55+ years of weather data.
Temperatures shown in Celsius with Fahrenheit in parentheses. Rainfall in millimetres, snowfall in centimetres.
Seoul Weather by Month
The coldest January reading, -19°C (-2°F) on January 5, 1986, has not been matched in 40 years.
On average, 23 nights in February drop below freezing.
The coldest March reading, -11°C (12°F) on March 4, 1977, has not been matched in 49 years.
The warmest April in the record was 2022; the coldest was 2010.
5 of the 10 warmest Mays on record in Seoul have come since 2012.
June in Seoul has become 1.9°C (3.4°F) warmer on average: the 2012–2026 average against 1970–1989.
July in Seoul has become 1.8°C (3.2°F) warmer on average: the 2012–2026 average against 1970–1989.
August 2026 was the 2nd warmest August in 49 years of records, 2.2°C (4.0°F) above the long-run average.
September 2025 was the warmest September in 48 years of records, 1.9°C (3.4°F) above the long-run average.
The October heat record, 29°C (84°F) on October 1, 1977, has stood for 49 years.
The coldest November reading, -11°C (12°F) on November 14, 1979, has not been matched in 47 years.
The coldest December reading, -18°C (0°F) on December 27, 1976, has not been matched in 50 years.
Source: NOAA GHCN-Daily, Seoul City (1973–2025); Incheon (1971–2026). Records through 2026.