Seoul, South Korea All-Time Weather Extremes
The most extreme temperature, precipitation, and snowfall ever recorded in Seoul, from NOAA GHCN daily weather observations.
Station: INCHEON
| Temperature | ||
|---|---|---|
| Record High | 102°F (39°C) | August 16, 1949 |
| Record Low | -2.2°F (-19°C) | January 5, 1970 |
| Lowest High | 10.4°F (-12°C) | January 5, 1986 |
| Highest Low | 85.1°F (30°C) | August 7, 2026 |
| Highest Mean | 91°F (33°C) | August 7, 2026 |
| Lowest Mean | 4.7°F (-15°C) | January 5, 1986 |
| Precipitation | ||
| Max in One Calendar Day | 11.94" (303.3 mm) | August 22, 2026 |
| Max in One Month | 49.10" (1247.1 mm) | August 2026 |
| Least in One Month | 0.00" (0.0 mm) | February 1977 |
| Max in One Year | 79.21" (2012.0 mm) | 1990 |
| Least in One Year | 23.74" (603.0 mm) | 1949 |
| Period of Record | ||
| Temperature | January 1, 1949 – October 27, 2026 | |
| Precipitation | January 1, 1949 – October 27, 2026 | |
Note: Records compiled from NOAA GHCN-Daily observations at INCHEON (20 mi from Seoul, South Korea). Quality-flagged readings are excluded. Monthly and annual totals require substantially complete reporting for “least” records.
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Frequently Asked Questions
What is the hottest temperature ever recorded in Seoul, South Korea?
The all-time record high in Seoul, South Korea is 102°F (39°C), set on August 16, 1949.
What is the coldest temperature ever recorded in Seoul, South Korea?
The all-time record low in Seoul, South Korea is -2.2°F (-19°C), set on January 5, 1970.
What is the most rain Seoul, South Korea has ever had in one day?
The most precipitation recorded in one calendar day near Seoul, South Korea is 11.94 inches, on August 22, 2026.