Gunpo climate

Name: Gunpo
Address: KR

Gunpo is warmest in August, with average highs of 28 °C, and coldest in January, when nights average -6.1 °C. July is the wettest month (284 mm) and January the driest (20 mm). Figures are 1991–2020 climate normals.

Across a full year Gunpo averages 1,139 mm of rain, 85 days above 25 °C and 104 days below freezing.

South Korea · population 286,485 · 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 28 °C
Coldest month January -6.1 °C
Driest month January 20 mm
Wettest month July 284 mm
Least cloud October 44 % cloud
Hottest on record August 37 °C
Coldest on record January -22 °C
Warmest sea August 24 °C

What to expectGunpo through the year

Gunpo has a clear annual cycle: average daily highs run from 1.5 °C in January to 28 °C in August, a swing of 27 °C in mean temperature across the year.

Counted across a normal year, 85 days a year reach 25 °C, 10 of them reach 30 °C, 104 nights drop below freezing. The warmest reading in the 1991–2020 record is 37 °C, in August.

Rain is strongly seasonal. July averages 284 mm against 20 mm in January — 14 times as much. Planning around the dry months matters more here than planning around temperature.

The sea off Gunpo is warmest in August at 24 °C and coldest in February at 4.0 °C. Sea temperature lags the air by a month or two, which is why late summer swims warmer than early summer at the same air temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	1.5 °C	20 mm	50 %
February	4.1 °C	28 mm	47 %
March	9.3 °C	38 mm	49 %
April	15.6 °C	68 mm	51 %
May	20.9 °C	89 mm	55 %
June	25.1 °C	125 mm	64 %
July	27.2 °C	284 mm	73 %
August	28.1 °C	240 mm	64 %
September	24.3 °C	125 mm	56 %
October	18.4 °C	54 mm	44 %
November	10.7 °C	46 mm	47 %
December	3.6 °C	23 mm	46 %

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	1.5 °C	-6.1 °C	-2.3 °C	13.4 °C	-21.6 °C	0	0	29
February	4.1 °C	-3.9 °C	-0.1 °C	16.4 °C	-19.7 °C	0	0	25
March	9.3 °C	0.5 °C	4.6 °C	19.4 °C	-7.4 °C	0	0	15
April	15.6 °C	6.3 °C	10.6 °C	26.3 °C	-2.4 °C	0	0	1
May	20.9 °C	12.0 °C	16.1 °C	30.7 °C	5.0 °C	3	0	0
June	25.1 °C	17.3 °C	20.9 °C	32.4 °C	11.1 °C	16	0	0
July	27.2 °C	21.6 °C	24.1 °C	35.3 °C	16.0 °C	26	3	0
August	28.1 °C	22.2 °C	24.9 °C	36.7 °C	14.8 °C	27	7	0
September	24.3 °C	17.1 °C	20.5 °C	31.6 °C	7.8 °C	12	0	0
October	18.4 °C	10.2 °C	14.1 °C	27.0 °C	-1.2 °C	1	0	0
November	10.7 °C	2.9 °C	6.7 °C	23.1 °C	-11.3 °C	0	0	9
December	3.6 °C	-3.9 °C	-0.2 °C	14.7 °C	-17.1 °C	0	0	26

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	20 mm	4	9.9 h/day	50 %	61 %	16 km/h	5.5 °C
February	28 mm	4	11 h/day	47 %	62 %	17 km/h	4.0 °C
March	38 mm	5	12 h/day	49 %	67 %	18 km/h	4.9 °C
April	68 mm	7	13 h/day	51 %	69 %	18 km/h	7.9 °C
May	89 mm	7	14 h/day	55 %	73 %	16 km/h	11.9 °C
June	125 mm	8	15 h/day	64 %	78 %	15 km/h	16.6 °C
July	284 mm	15	14 h/day	73 %	86 %	15 km/h	20.7 °C
August	240 mm	15	14 h/day	64 %	84 %	14 km/h	23.6 °C
September	125 mm	8	12 h/day	56 %	77 %	13 km/h	23.2 °C
October	54 mm	5	11 h/day	44 %	71 %	14 km/h	19.7 °C
November	46 mm	7	10 h/day	47 %	70 %	15 km/h	14.9 °C
December	23 mm	5	9.6 h/day	46 %	64 %	16 km/h	9.5 °C

How Gunpo 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
Gunpo	28 °C	-6.1 °C	1,139 mm	85
Anyang-si · South Korea	28 °C	-6.1 °C	1,209 mm	84
Suwon · South Korea	28 °C	-6.2 °C	1,146 mm	93
Seongnam-si · South Korea	28 °C	-6.6 °C	1,294 mm	95
Bucheon-si · South Korea	28 °C	-6.4 °C	1,153 mm	83
Hwaseong-si · South Korea	27 °C	-4.4 °C	1,224 mm	68
Seoul · South Korea	29 °C	-7.1 °C	1,206 mm	97

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

QuestionsCommon questions about Gunpo’s climate

When is the best time to visit Gunpo?

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 Gunpo get?

In August, the warmest month, daily highs average 28 °C. About 10 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 -6.1 °C in January, the coldest month. A normal year has 104 nights below freezing.

Which month is wettest in Gunpo?

July, averaging 284 mm over 15 days with rain. The driest month is January with 20 mm. The year as a whole averages 1,139 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 Gunpo 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: 37.367°, 126.947° (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.