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Weather extremes

How extreme does Hŭngnam's weather get?

The hottest, coldest, wettest and snowiest days Hŭngnam 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 Hamheung station 12 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 Hŭngnam has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
102°F Aug 4, 2018

That is about 19°F hotter than a normal August afternoon in Hŭngnam (typical high near 82°F).

The three most extreme on record

1 102°F Aug 4, 2018
2 102°F Jul 21, 2014
3 101°F Jul 25, 1995
❄️ Coldest night
-10°F Dec 31, 2020

About 29°F colder than a normal December night in Hŭngnam (typical low near 19°F).

The three most extreme on record

1 -10°F Dec 31, 2020
2 -10°F Jan 14, 1997
3 -8°F Jan 8, 2021
🌧️ Most rain in one day
10.71 in Jun 12, 2015

More rain in a single day than Hŭngnam usually gets in the whole month of June (typical June total about 3.6 in).

The three most extreme on record

1 10.71 in Jun 12, 2015
2 7.80 in Jul 10, 2004
3 6.34 in Aug 2, 2021

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 102°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Hŭngnam's record heat sits well above even a hot day for the season — August's 102°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, Hŭngnam's warmest days reach the low 80s°F and its coldest nights drop to the mid-10s°F. But across the record it has gone as high as 102°F and as low as −10°F. A single day has delivered over 11 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 Hamheung, a weather station, about 12 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →