Hyesan climate

Name: Hyesan
Address: KP

Hyesan is warmest in July, with average highs of 25 °C, and coldest in January, when nights average -22 °C. July is the wettest month (168 mm) and January the driest (10 mm). Figures are 1991–2020 climate normals.

Across a full year Hyesan averages 774 mm of rain, 40 days above 25 °C and 173 days below freezing.

North Korea · population 192,680 · 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 July 25 °C
Coldest month January -22 °C
Driest month January 10 mm
Wettest month July 168 mm
Least cloud October 46 % cloud
Hottest on record August 36 °C
Coldest on record December -39 °C

What to expectHyesan through the year

Hyesan has a clear annual cycle: average daily highs run from -8.2 °C in January to 25 °C in July, a swing of 35 °C in mean temperature across the year.

Counted across a normal year, 40 days a year reach 25 °C, 3 of them reach 30 °C, 173 nights drop below freezing. The warmest reading in the 1991–2020 record is 36 °C, in August.

Rain is strongly seasonal. July averages 168 mm against 10 mm in January — 16 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	-8.2 °C	10 mm	47 %
February	-4.4 °C	18 mm	48 %
March	2.3 °C	32 mm	53 %
April	11.2 °C	56 mm	56 %
May	18.1 °C	93 mm	61 %
June	22.5 °C	99 mm	68 %
July	25.1 °C	168 mm	74 %
August	24.6 °C	132 mm	68 %
September	19.8 °C	69 mm	55 %
October	12.2 °C	42 mm	46 %
November	2.5 °C	37 mm	49 %
December	-6.3 °C	18 mm	49 %

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	-8.2 °C	-21.9 °C	-14.4 °C	5.0 °C	-36.6 °C	0	0	31
February	-4.4 °C	-17.9 °C	-10.6 °C	12.5 °C	-33.8 °C	0	0	28
March	2.3 °C	-8.9 °C	-3.3 °C	20.4 °C	-27.8 °C	0	0	29
April	11.2 °C	-0.1 °C	5.4 °C	27.6 °C	-15.1 °C	0	0	14
May	18.1 °C	5.9 °C	12.0 °C	32.1 °C	-3.1 °C	2	0	1
June	22.5 °C	11.5 °C	17.0 °C	32.7 °C	1.5 °C	7	0	0
July	25.1 °C	15.6 °C	20.2 °C	36.0 °C	6.7 °C	16	2	0
August	24.6 °C	15.1 °C	19.7 °C	36.2 °C	2.5 °C	13	1	0
September	19.8 °C	8.7 °C	14.1 °C	28.1 °C	-0.4 °C	1	0	0
October	12.2 °C	1.4 °C	6.3 °C	25.5 °C	-14.8 °C	0	0	11
November	2.5 °C	-7.7 °C	-2.8 °C	17.2 °C	-32.4 °C	0	0	26
December	-6.3 °C	-18.7 °C	-12.1 °C	8.0 °C	-39.0 °C	0	0	31

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	10 mm	3	9.5 h/day	47 %	64 %	12 km/h
February	18 mm	5	11 h/day	48 %	63 %	14 km/h
March	32 mm	7	12 h/day	53 %	59 %	17 km/h
April	56 mm	10	13 h/day	56 %	60 %	17 km/h
May	93 mm	15	15 h/day	61 %	68 %	15 km/h
June	99 mm	16	15 h/day	68 %	76 %	11 km/h
July	168 mm	18	15 h/day	74 %	82 %	10 km/h
August	132 mm	14	14 h/day	68 %	81 %	10.0 km/h
September	69 mm	8	13 h/day	55 %	73 %	11 km/h
October	42 mm	8	11 h/day	46 %	66 %	13 km/h
November	37 mm	8	9.9 h/day	49 %	64 %	13 km/h
December	18 mm	5	9.2 h/day	49 %	65 %	12 km/h

How Hyesan 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
Hyesan	25 °C	-22 °C	774 mm	40
Changam-ch’on · North Korea	26 °C	-12 °C	836 mm	59
Chongjin · North Korea	24 °C	-12 °C	1,021 mm	18
Kanggye · North Korea	27 °C	-20 °C	1,103 mm	68
Sinp’o · North Korea	25 °C	-7.4 °C	872 mm	29
Baishan · China	26 °C	-21 °C	1,059 mm	55
Hamhŭng · North Korea	26 °C	-11 °C	1,131 mm	52

Where Hyesan ranks

Ranking	Position	Value
The coolest places in Asia in April	21st of 50	11 °C
The coolest places in Asia in May	24th of 50	18 °C
The coolest places in Asia year-round	27th of 50	9.9 °C
The coolest places in Asia in March	28th of 50	2.3 °C
The coolest places in Asia in February	30th of 50	-4.4 °C
The coolest places in Asia in September	32nd of 50	20 °C

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

QuestionsCommon questions about Hyesan’s climate

When is the best time to visit Hyesan?

That depends on what you want, so the honest answer is a comparison rather than a single month. June, July, August sit closest to 20 °C on average, July is the warmest month and January the driest. The month-by-month table above has the full picture.

How hot does Hyesan get?

In July, the warmest month, daily highs average 25 °C. About 3 days a year pass 30 °C. The highest value in the 1991–2020 record is 36 °C.

How cold does it get in winter?

Nights average -22 °C in January, the coldest month. A normal year has 173 nights below freezing.

Which month is wettest in Hyesan?

July, averaging 168 mm over 18 days with rain. The driest month is January with 10 mm. The year as a whole averages 774 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 Hyesan 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: 41.402°, 128.178° (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.