Gumi climate

Name: Gumi
Address: KR

Gumi is warmest in August, with average highs of 30 °C, and coldest in January, when nights average -4.0 °C. July is the wettest month (223 mm) and December the driest (22 mm). Figures are 1991–2020 climate normals.

Across a full year Gumi averages 1,119 mm of rain, 111 days above 25 °C and 92 days below freezing.

South Korea · population 404,691 · 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 30 °C
Coldest month January -4.0 °C
Driest month December 22 mm
Wettest month July 223 mm
Least cloud December 43 % cloud
Hottest on record August 39 °C
Coldest on record January -20 °C

What to expectGumi through the year

Gumi has a clear annual cycle: average daily highs run from 3.9 °C in January to 30 °C in August, a swing of 26 °C in mean temperature across the year.

Counted across a normal year, 111 days a year reach 25 °C, 39 of them reach 30 °C, 92 nights drop below freezing. The warmest reading in the 1991–2020 record is 39 °C, in August.

Rain is strongly seasonal. July averages 223 mm against 22 mm in December — 10 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	3.9 °C	23 mm	47 %
February	6.7 °C	30 mm	48 %
March	12.2 °C	54 mm	52 %
April	18.7 °C	79 mm	54 %
May	24.0 °C	89 mm	57 %
June	27.8 °C	132 mm	69 %
July	29.3 °C	223 mm	75 %
August	29.7 °C	223 mm	68 %
September	25.1 °C	148 mm	61 %
October	19.7 °C	60 mm	46 %
November	12.5 °C	36 mm	44 %
December	5.7 °C	22 mm	43 %

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	3.9 °C	-4.0 °C	-0.5 °C	15.7 °C	-19.7 °C	0	0	28
February	6.7 °C	-2.4 °C	1.6 °C	19.7 °C	-15.3 °C	0	0	22
March	12.2 °C	1.4 °C	6.4 °C	24.5 °C	-6.9 °C	0	0	11
April	18.7 °C	7.1 °C	12.6 °C	30.9 °C	-2.0 °C	2	0	1
May	24.0 °C	12.7 °C	18.1 °C	35.3 °C	4.2 °C	13	1	0
June	27.8 °C	18.1 °C	22.6 °C	36.7 °C	10.2 °C	24	7	0
July	29.3 °C	21.9 °C	25.2 °C	38.2 °C	14.1 °C	27	14	0
August	29.7 °C	22.4 °C	25.6 °C	39.2 °C	14.8 °C	28	15	0
September	25.1 °C	17.2 °C	20.9 °C	34.7 °C	7.7 °C	15	2	0
October	19.7 °C	10.3 °C	14.7 °C	27.6 °C	-0.6 °C	2	0	0
November	12.5 °C	3.5 °C	7.7 °C	23.6 °C	-7.2 °C	0	0	6
December	5.7 °C	-2.4 °C	1.2 °C	17.0 °C	-14.4 °C	0	0	24

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	23 mm	4	10.0 h/day	47 %	60 %	16 km/h
February	30 mm	4	11 h/day	48 %	58 %	15 km/h
March	54 mm	7	12 h/day	52 %	61 %	15 km/h
April	79 mm	7	13 h/day	54 %	61 %	15 km/h
May	89 mm	7	14 h/day	57 %	64 %	14 km/h
June	132 mm	9	15 h/day	69 %	70 %	12 km/h
July	223 mm	15	14 h/day	75 %	81 %	12 km/h
August	223 mm	15	14 h/day	68 %	80 %	12 km/h
September	148 mm	10	12 h/day	61 %	77 %	11 km/h
October	60 mm	5	11 h/day	46 %	71 %	12 km/h
November	36 mm	5	10 h/day	44 %	70 %	13 km/h
December	22 mm	3	9.7 h/day	43 %	65 %	15 km/h

How Gumi 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
Gumi	30 °C	-4.0 °C	1,119 mm	111
Gimcheon · South Korea	29 °C	-4.3 °C	1,203 mm	109
Daegu · South Korea	30 °C	-3.4 °C	1,089 mm	114
Gyeongsan-si · South Korea	30 °C	-3.3 °C	1,055 mm	114
Andong · South Korea	29 °C	-4.9 °C	1,012 mm	102
Gyeongju · South Korea	29 °C	-2.8 °C	1,135 mm	104
Daejeon · South Korea	29 °C	-4.3 °C	1,099 mm	110

Where Gumi ranks

Ranking	Position	Value
Places with the best weather in Asia in May	25thof 50	93/100

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

QuestionsCommon questions about Gumi’s climate

When is the best time to visit Gumi?

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 Gumi get?

In August, the warmest month, daily highs average 30 °C. About 39 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 -4.0 °C in January, the coldest month. A normal year has 92 nights below freezing.

Which month is wettest in Gumi?

July, averaging 223 mm over 15 days with rain. The driest month is December with 22 mm. The year as a whole averages 1,119 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 Gumi 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.