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Weather extremes

How extreme does Haeju's weather get?

The hottest, coldest, wettest and snowiest days Haeju 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 Haeju station 2 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 Haeju has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
98°F Aug 1, 2018

That is about 14°F hotter than a normal August afternoon in Haeju (typical high near 84°F).

The three most extreme on record

1 98°F Aug 1, 2018
2 96°F Jul 24, 2021
3 96°F Aug 2, 2014
❄️ Coldest night
-2°F Jan 30, 1997

About 21°F colder than a normal January night in Haeju (typical low near 19°F).

The three most extreme on record

1 -2°F Jan 30, 1997
2 -2°F Feb 3, 1996
3 -1°F Jan 14, 2001
🌧️ Most rain in one day
8.78 in Jul 26, 1996

About 73% of a typical July's rain in a single day (Haeju averages roughly 12.0 in across the month).

The three most extreme on record

1 8.78 in Jul 26, 1996
2 8.03 in Aug 5, 2015
3 7.68 in Aug 20, 2017

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° all-time high 98°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Haeju's record heat sits well above even a hot day for the season — August's 98°F is about 14°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, Haeju's warmest days reach the mid-80s°F and its coldest nights drop to the high 10s°F. But across the record it has gone as high as 98°F and as low as −2°F. A single day has delivered over 9 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 Haeju, a weather station, about 2 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →