Cheongju-si climate

Name: Cheongju-si
Address: KR

Cheongju-si is warmest in August, with average highs of 29 °C, and coldest in January, when nights average -4.9 °C. July is the wettest month (261 mm) and January the driest (23 mm). Figures are 1991–2020 climate normals.

Across a full year Cheongju-si averages 1,163 mm of rain, 110 days above 25 °C and 100 days below freezing.

South Korea · population 852,147 · 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 -4.9 °C
Driest month January 23 mm
Wettest month July 261 mm
Least cloud October 46 % cloud
Hottest on record August 39 °C
Coldest on record January -18 °C

What to expectCheongju-si through the year

Cheongju-si has a clear annual cycle: average daily highs run from 2.9 °C in January to 29 °C in August, a swing of 27 °C in mean temperature across the year.

Counted across a normal year, 110 days a year reach 25 °C, 33 of them reach 30 °C, 100 nights drop below freezing. The warmest reading in the 1991–2020 record is 39 °C, in August.

Rain is strongly seasonal. July averages 261 mm against 23 mm in January — 12 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	2.9 °C	23 mm	52 %
February	5.7 °C	32 mm	50 %
March	11.4 °C	49 mm	52 %
April	18.2 °C	81 mm	52 %
May	23.6 °C	91 mm	56 %
June	27.8 °C	130 mm	66 %
July	29.0 °C	261 mm	75 %
August	29.4 °C	233 mm	67 %
September	25.1 °C	141 mm	58 %
October	19.4 °C	56 mm	46 %
November	11.8 °C	43 mm	48 %
December	4.7 °C	24 mm	48 %

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	2.9 °C	-4.9 °C	-1.3 °C	15.8 °C	-18.2 °C	0	0	29
February	5.7 °C	-3.1 °C	0.8 °C	19.8 °C	-17.1 °C	0	0	23
March	11.4 °C	1.1 °C	5.8 °C	23.9 °C	-12.2 °C	0	0	13
April	18.2 °C	7.0 °C	12.2 °C	30.7 °C	-2.5 °C	1	0	1
May	23.6 °C	12.7 °C	17.9 °C	33.5 °C	4.1 °C	11	1	0
June	27.8 °C	18.1 °C	22.7 °C	35.8 °C	10.3 °C	25	7	0
July	29.0 °C	21.9 °C	25.1 °C	37.4 °C	13.8 °C	28	11	0
August	29.4 °C	22.3 °C	25.5 °C	39.2 °C	14.2 °C	28	14	0
September	25.1 °C	16.8 °C	20.8 °C	32.1 °C	8.3 °C	15	1	0
October	19.4 °C	9.9 °C	14.3 °C	27.3 °C	-1.4 °C	1	0	0
November	11.8 °C	3.0 °C	7.1 °C	24.0 °C	-8.9 °C	0	0	8
December	4.7 °C	-3.1 °C	0.5 °C	15.9 °C	-16.5 °C	0	0	26

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	23 mm	4	9.9 h/day	52 %	63 %	15 km/h
February	32 mm	4	11 h/day	50 %	61 %	16 km/h
March	49 mm	6	12 h/day	52 %	64 %	17 km/h
April	81 mm	7	13 h/day	52 %	62 %	17 km/h
May	91 mm	8	14 h/day	56 %	65 %	16 km/h
June	130 mm	9	15 h/day	66 %	69 %	13 km/h
July	261 mm	17	14 h/day	75 %	82 %	14 km/h
August	233 mm	16	14 h/day	67 %	81 %	13 km/h
September	141 mm	9	12 h/day	58 %	76 %	12 km/h
October	56 mm	5	11 h/day	46 %	71 %	13 km/h
November	43 mm	6	10 h/day	48 %	71 %	14 km/h
December	24 mm	5	9.7 h/day	48 %	67 %	14 km/h

How Cheongju-si 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
Cheongju-si	29 °C	-4.9 °C	1,163 mm	110
Daejeon · South Korea	29 °C	-4.3 °C	1,099 mm	110
Pyeongtaek · South Korea	29 °C	-5.4 °C	1,132 mm	106
Chungju · South Korea	29 °C	-6.2 °C	1,173 mm	101
Osan · South Korea	29 °C	-5.8 °C	1,148 mm	100
Icheon-si · South Korea	29 °C	-6.5 °C	1,232 mm	103
Gimcheon · South Korea	29 °C	-4.3 °C	1,203 mm	109

Where Cheongju-si ranks

Ranking	Position	Value
Places with the best weather in Asia in May	41stof 50	93/100

Planning a trip? See the best time to visit Cheongju-si.

QuestionsCommon questions about Cheongju-si’s climate

When is the best time to visit Cheongju-si?

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 Cheongju-si get?

In August, the warmest month, daily highs average 29 °C. About 33 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 -4.9 °C in January, the coldest month. A normal year has 100 nights below freezing.

Which month is wettest in Cheongju-si?

July, averaging 261 mm over 17 days with rain. The driest month is January with 23 mm. The year as a whole averages 1,163 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 Cheongju-si 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
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.