Daejeon climate

Name: Daejeon
Address: KR

Daejeon is warmest in August, with average highs of 29 °C, and coldest in January, when nights average -4.3 °C. July is the wettest month (238 mm) and January the driest (24 mm). Figures are 1991–2020 climate normals.

Across a full year Daejeon averages 1,099 mm of rain, 110 days above 25 °C and 95 days below freezing.

South Korea · population 1,441,203 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month August 29 °C
Coldest month January -4.3 °C
Driest month January 24 mm
Wettest month July 238 mm
Least cloud October 46 % cloud
Hottest on record August 39 °C
Coldest on record January -19 °C

What to expectDaejeon through the year

Daejeon has a clear annual cycle: average daily highs run from 3.3 °C in January to 29 °C in August, a swing of 26 °C in mean temperature across the year.

Counted across a normal year, 110 days a year reach 25 °C, 32 of them reach 30 °C, 95 nights drop below freezing. The warmest reading in the 1991–2020 record is 39 °C, in August.

Rain is strongly seasonal. July averages 238 mm against 24 mm in January — 9.8 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	3.3 °C	24 mm	56 %
February	6.1 °C	33 mm	52 %
March	11.6 °C	52 mm	53 %
April	18.2 °C	78 mm	53 %
May	23.6 °C	86 mm	57 %
June	27.6 °C	129 mm	67 %
July	28.8 °C	238 mm	74 %
August	29.4 °C	201 mm	66 %
September	25.2 °C	139 mm	58 %
October	19.6 °C	54 mm	46 %
November	12.2 °C	40 mm	47 %
December	5.2 °C	25 mm	51 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C	Days below 0 °C
January	3.3 °C	-4.3 °C	-0.8 °C	16.6 °C	-19.3 °C	0	0	29
February	6.1 °C	-2.7 °C	1.2 °C	19.9 °C	-15.3 °C	0	0	23
March	11.6 °C	1.3 °C	6.0 °C	23.8 °C	-11.1 °C	0	0	12
April	18.2 °C	7.1 °C	12.3 °C	30.5 °C	-2.6 °C	1	0	1
May	23.6 °C	12.8 °C	17.9 °C	33.4 °C	4.4 °C	11	1	0
June	27.6 °C	18.1 °C	22.5 °C	35.6 °C	9.8 °C	24	6	0
July	28.8 °C	22.0 °C	25.1 °C	36.6 °C	13.7 °C	28	10	0
August	29.4 °C	22.3 °C	25.5 °C	38.6 °C	15.1 °C	28	13	0
September	25.2 °C	17.0 °C	20.8 °C	32.9 °C	8.9 °C	15	1	0
October	19.6 °C	10.1 °C	14.5 °C	27.8 °C	-1.2 °C	1	0	0
November	12.2 °C	3.5 °C	7.5 °C	24.3 °C	-7.7 °C	0	0	7
December	5.2 °C	-2.5 °C	1.0 °C	17.2 °C	-14.2 °C	0	0	24

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	24 mm	5	10.0 h/day	56 %	64 %	15 km/h
February	33 mm	5	11 h/day	52 %	61 %	16 km/h
March	52 mm	7	12 h/day	53 %	64 %	17 km/h
April	78 mm	7	13 h/day	53 %	63 %	17 km/h
May	86 mm	8	14 h/day	57 %	66 %	15 km/h
June	129 mm	9	15 h/day	67 %	71 %	13 km/h
July	238 mm	16	14 h/day	74 %	82 %	15 km/h
August	201 mm	15	14 h/day	66 %	81 %	13 km/h
September	139 mm	9	12 h/day	58 %	76 %	13 km/h
October	54 mm	6	11 h/day	46 %	71 %	13 km/h
November	40 mm	6	10 h/day	47 %	70 %	14 km/h
December	25 mm	5	9.7 h/day	51 %	67 %	14 km/h

How Daejeon compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Daejeon	29 °C	-4.3 °C	1,099 mm	110
Cheongju-si · South Korea	29 °C	-4.9 °C	1,163 mm	110
Iksan · South Korea	29 °C	-3.7 °C	1,195 mm	104
Jeonju · South Korea	29 °C	-3.8 °C	1,214 mm	105
Gimcheon · South Korea	29 °C	-4.3 °C	1,203 mm	109
Gunsan · South Korea	28 °C	-2.4 °C	1,159 mm	74
Pyeongtaek · South Korea	29 °C	-5.4 °C	1,132 mm	106

Where Daejeon ranks

Ranking	Position	Value
Places with the best weather in Asia in May	47th of 50	93/100

Planning a trip? See the best time to visit Daejeon.

QuestionsCommon questions about Daejeon’s climate

When is the best time to visit Daejeon?

That depends on what you want, so the honest answer is a comparison rather than a single month. May, June, September sit closest to 20 °C on average, August is the warmest month and January the driest. The month-by-month table above has the full picture.

How hot does Daejeon get?

In August, the warmest month, daily highs average 29 °C. About 32 days a year pass 30 °C. The highest value in the 1991–2020 record is 39 °C.

How cold does it get in winter?

Nights average -4.3 °C in January, the coldest month. A normal year has 95 nights below freezing.

Which month is wettest in Daejeon?

July, averaging 238 mm over 16 days with rain. The driest month is January with 24 mm. The year as a whole averages 1,099 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Daejeon rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Data point: 36.349°, 127.385° (the coordinates the reanalysis values are taken for)
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.