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Weather extremes

How extreme does Daejeon's weather get?

The hottest, coldest, wettest and snowiest days Daejeon 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 Taejon station 6 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 Daejeon has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
102°F Aug 15, 2018

That is about 16°F hotter than a normal August afternoon in Daejeon (typical high near 86°F).

The three most extreme on record

1 102°F Aug 15, 2018
2 102°F Aug 1, 2018
3 101°F Aug 2, 2018
❄️ Coldest night
-9°F Jan 29, 2003

About 29°F colder than a normal January night in Daejeon (typical low near 20°F).

The three most extreme on record

1 -9°F Jan 29, 2003
2 -8°F Jan 7, 2021
3 -6°F Jan 8, 2021
🌧️ Most rain in one day
12.24 in Aug 4, 1997

About 96% of a typical August's rain in a single day (Daejeon averages roughly 12.8 in across the month).

The three most extreme on record

1 12.24 in Aug 4, 1997
2 12.09 in Aug 14, 1992
3 9.41 in Sep 13, 1992

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

Daejeon's record heat sits well above even a hot day for the season — August's 102°F is about 16°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, Daejeon'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 102°F and as low as −9°F. A single day has delivered over 12 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 Taejon, a weather station, about 6 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →