Iksan climate

Name: Iksan
Address: KR

Iksan is warmest in August, with average highs of 29 °C, and coldest in January, when nights average -3.7 °C. July is the wettest month (272 mm) and January the driest (24 mm). Figures are 1991–2020 climate normals.

Across a full year Iksan averages 1,195 mm of rain, 104 days above 25 °C and 93 days below freezing.

South Korea · population 307,000 · 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 -3.7 °C
Driest month January 24 mm
Wettest month July 272 mm
Least cloud October 46 % cloud
Hottest on record August 39 °C
Coldest on record January -17 °C

What to expectIksan through the year

Iksan has a clear annual cycle: average daily highs run from 3.6 °C in January to 29 °C in August, a swing of 26 °C in mean temperature across the year.

Counted across a normal year, 104 days a year reach 25 °C, 22 of them reach 30 °C, 93 nights drop below freezing. The warmest reading in the 1991–2020 record is 39 °C, in August.

Rain is strongly seasonal. July averages 272 mm against 24 mm in January — 11 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	3.6 °C	24 mm	61 %
February	6.0 °C	32 mm	56 %
March	11.1 °C	50 mm	54 %
April	17.3 °C	82 mm	53 %
May	22.6 °C	88 mm	57 %
June	26.5 °C	139 mm	69 %
July	28.3 °C	272 mm	74 %
August	29.0 °C	237 mm	65 %
September	25.2 °C	145 mm	57 %
October	19.6 °C	57 mm	46 %
November	12.6 °C	43 mm	50 %
December	5.7 °C	26 mm	56 %

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	3.6 °C	-3.7 °C	-0.2 °C	16.2 °C	-16.8 °C	0	0	28
February	6.0 °C	-2.4 °C	1.5 °C	20.0 °C	-11.8 °C	0	0	23
March	11.1 °C	1.3 °C	5.8 °C	23.4 °C	-6.6 °C	0	0	12
April	17.3 °C	6.7 °C	11.7 °C	28.8 °C	-2.5 °C	1	0	1
May	22.6 °C	12.3 °C	17.2 °C	31.0 °C	3.5 °C	8	0	0
June	26.5 °C	17.6 °C	21.7 °C	33.6 °C	9.8 °C	22	2	0
July	28.3 °C	22.0 °C	24.8 °C	37.1 °C	14.5 °C	28	7	0
August	29.0 °C	22.3 °C	25.5 °C	39.1 °C	14.6 °C	29	12	0
September	25.2 °C	17.0 °C	21.0 °C	32.6 °C	7.5 °C	16	1	0
October	19.6 °C	10.2 °C	14.7 °C	28.6 °C	0.3 °C	1	0	0
November	12.6 °C	3.8 °C	8.0 °C	24.9 °C	-5.9 °C	0	0	6
December	5.7 °C	-2.0 °C	1.7 °C	18.1 °C	-16.2 °C	0	0	23

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	24 mm	5	10.0 h/day	61 %	66 %	15 km/h
February	32 mm	5	11 h/day	56 %	65 %	16 km/h
March	50 mm	7	12 h/day	54 %	67 %	17 km/h
April	82 mm	7	13 h/day	53 %	68 %	17 km/h
May	88 mm	7	14 h/day	57 %	71 %	16 km/h
June	139 mm	9	15 h/day	69 %	77 %	14 km/h
July	272 mm	16	14 h/day	74 %	85 %	15 km/h
August	237 mm	15	14 h/day	65 %	83 %	14 km/h
September	145 mm	8	12 h/day	57 %	78 %	13 km/h
October	57 mm	5	11 h/day	46 %	72 %	13 km/h
November	43 mm	6	10 h/day	50 %	70 %	14 km/h
December	26 mm	5	9.7 h/day	56 %	68 %	15 km/h

How Iksan 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
Iksan	29 °C	-3.7 °C	1,195 mm	104
Jeonju · South Korea	29 °C	-3.8 °C	1,214 mm	105
Gunsan · South Korea	28 °C	-2.4 °C	1,159 mm	74
Daejeon · South Korea	29 °C	-4.3 °C	1,099 mm	110
Gwangju · South Korea	29 °C	-3.0 °C	1,246 mm	107
Cheongju-si · South Korea	29 °C	-4.9 °C	1,163 mm	110
Gimcheon · South Korea	29 °C	-4.3 °C	1,203 mm	109

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

QuestionsCommon questions about Iksan’s climate

When is the best time to visit Iksan?

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 Iksan get?

In August, the warmest month, daily highs average 29 °C. About 22 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 -3.7 °C in January, the coldest month. A normal year has 93 nights below freezing.

Which month is wettest in Iksan?

July, averaging 272 mm over 16 days with rain. The driest month is January with 24 mm. The year as a whole averages 1,195 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 Iksan 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: 35.944°, 126.954° (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.