Climate-Zone.com

HomeCitiesSouth KoreaHongseongTools › Weather extremes

Weather extremes

How extreme does Hongseong's weather get?

The hottest, coldest, wettest and snowiest days Hongseong has recorded — the outer limits of what its weather can do, and how far they sit beyond a normal day.

Based on 34 years of daily weather observations (1991–present), from the Seosan station 24 km away. Updated through August 2025 — an all-time extreme only changes when a more extreme day actually occurs, so some dates are old. That is normal, not stale data.

The four kinds of extreme

The hottest, coldest, wettest and snowiest single days Hongseong has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
104°F Aug 24, 2006

That is about 19°F hotter than a normal August afternoon in Hongseong (typical high near 85°F).

The three most extreme on record

1 104°F Aug 24, 2006
2 100°F Aug 6, 1995
3 99°F Jul 26, 1994
❄️ Coldest night
-5°F Jan 20, 2004

About 24°F colder than a normal January night in Hongseong (typical low near 20°F).

The three most extreme on record

1 -5°F Jan 20, 2004
2 -4°F Jan 9, 2021
3 -2°F Jan 7, 2005
🌧️ Most rain in one day
12.64 in Aug 26, 2000

More rain in a single day than Hongseong usually gets in the whole month of August (typical August total about 12.6 in).

The three most extreme on record

1 12.64 in Aug 26, 2000
2 11.22 in Sep 2, 1992
3 11.15 in Aug 3, 1999

How hot and cold it gets, month by month

The shaded band is the normal range of daily temperatures for each month. The dots show the most extreme it has ever been — so you can see how far beyond a normal day the records really sit.

-30°-10°10°30°50°70°90°110°130° all-time high 104°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Hongseong's record heat sits well above even a hot day for the season — August's 104°F is about 19°F beyond a normal hot afternoon. Its record cold is just as far below a normal winter night — the dots mark how rare each extreme really is.

In plain terms

In a normal year, Hongseong's warmest days reach the mid-80s°F and its coldest nights drop to the low 20s°F. But across the record it has gone as high as 104°F and as low as −4°F. A single day has delivered over 13 inches of rain. Those are the outer edges worth knowing if you are moving here, planning a trip, or thinking about a house.
Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Seosan, a weather station, about 24 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →