Gwangyang climate

Name: Gwangyang
Address: KR

Gwangyang is warmest in August, with average highs of 29 °C, and coldest in January, when nights average -2.5 °C. July is the wettest month (305 mm) and December the driest (28 mm). Figures are 1991–2020 climate normals.

Across a full year Gwangyang averages 1,527 mm of rain, 95 days above 25 °C and 71 days below freezing.

South Korea · population 154,266 · 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 -2.5 °C
Driest month December 28 mm
Wettest month July 305 mm
Least cloud December 41 % cloud
Hottest on record July 37 °C
Coldest on record January -14 °C

What to expectGwangyang through the year

Gwangyang has a clear annual cycle: average daily highs run from 5.6 °C in January to 29 °C in August, a swing of 25 °C in mean temperature across the year.

Counted across a normal year, 95 days a year reach 25 °C, 17 of them reach 30 °C, 71 nights drop below freezing. The warmest reading in the 1991–2020 record is 37 °C, in July.

Rain is strongly seasonal. July averages 305 mm against 28 mm in December — 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	5.6 °C	32 mm	48 %
February	7.9 °C	44 mm	50 %
March	12.4 °C	82 mm	54 %
April	17.7 °C	128 mm	57 %
May	22.3 °C	143 mm	61 %
June	25.2 °C	208 mm	73 %
July	27.8 °C	305 mm	76 %
August	28.8 °C	280 mm	66 %
September	25.4 °C	164 mm	60 %
October	20.6 °C	68 mm	43 %
November	14.0 °C	46 mm	42 %
December	7.7 °C	28 mm	41 %

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	5.6 °C	-2.5 °C	1.0 °C	16.0 °C	-13.8 °C	0	0	25
February	7.9 °C	-1.0 °C	2.9 °C	18.5 °C	-10.7 °C	0	0	19
March	12.4 °C	3.1 °C	7.3 °C	21.9 °C	-4.7 °C	0	0	6
April	17.7 °C	8.6 °C	12.8 °C	26.0 °C	-0.2 °C	0	0	0
May	22.3 °C	13.8 °C	17.7 °C	33.8 °C	6.3 °C	6	0	0
June	25.2 °C	18.4 °C	21.5 °C	31.9 °C	11.5 °C	16	0	0
July	27.8 °C	22.6 °C	24.9 °C	36.5 °C	15.7 °C	26	6	0
August	28.8 °C	23.2 °C	25.7 °C	36.4 °C	17.1 °C	29	10	0
September	25.4 °C	18.5 °C	21.6 °C	32.7 °C	10.5 °C	17	1	0
October	20.6 °C	12.0 °C	15.9 °C	27.6 °C	1.7 °C	1	0	0
November	14.0 °C	5.3 °C	9.2 °C	24.7 °C	-4.4 °C	0	0	2
December	7.7 °C	-0.6 °C	3.0 °C	16.9 °C	-9.5 °C	0	0	19

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	32 mm	4	10 h/day	48 %	65 %	15 km/h
February	44 mm	5	11 h/day	50 %	64 %	15 km/h
March	82 mm	7	12 h/day	54 %	69 %	16 km/h
April	128 mm	8	13 h/day	57 %	72 %	16 km/h
May	143 mm	8	14 h/day	61 %	77 %	15 km/h
June	208 mm	11	14 h/day	73 %	84 %	14 km/h
July	305 mm	18	14 h/day	76 %	89 %	15 km/h
August	280 mm	17	13 h/day	66 %	87 %	14 km/h
September	164 mm	10	12 h/day	60 %	81 %	13 km/h
October	68 mm	5	11 h/day	43 %	75 %	13 km/h
November	46 mm	5	10 h/day	42 %	73 %	13 km/h
December	28 mm	3	9.8 h/day	41 %	68 %	14 km/h

How Gwangyang 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
Gwangyang	29 °C	-2.5 °C	1,527 mm	95
Suncheon · South Korea	29 °C	-2.2 °C	1,520 mm	106
Yeosu · South Korea	28 °C	-0.2 °C	1,406 mm	67
Chinju · South Korea	29 °C	-3.7 °C	1,432 mm	105
Gwangju · South Korea	29 °C	-3.0 °C	1,246 mm	107
Geoje · South Korea	27 °C	1.6 °C	1,349 mm	52
Changwon · South Korea	29 °C	-1.5 °C	1,323 mm	92

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

QuestionsCommon questions about Gwangyang’s climate

When is the best time to visit Gwangyang?

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 December the driest. The month-by-month table above has the full picture.

How hot does Gwangyang get?

In August, the warmest month, daily highs average 29 °C. About 17 days a year pass 30 °C. The highest value in the 1991–2020 record is 37 °C.

How cold does it get in winter?

Nights average -2.5 °C in January, the coldest month. A normal year has 71 nights below freezing.

Which month is wettest in Gwangyang?

July, averaging 305 mm over 18 days with rain. The driest month is December with 28 mm. The year as a whole averages 1,527 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 Gwangyang 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.