Sinp’o climate

Name: Sinp’o
Address: KP

Sinp’o is warmest in August, with average highs of 25 °C, and coldest in January, when nights average -7.4 °C. August is the wettest month (185 mm) and February the driest (26 mm). Figures are 1991–2020 climate normals.

Across a full year Sinp’o averages 872 mm of rain, 29 days above 25 °C and 109 days below freezing.

North Korea · population 152,759 · 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 25 °C
Coldest month January -7.4 °C
Driest month February 26 mm
Wettest month August 185 mm
Least cloud December 37 % cloud
Hottest on record August 34 °C
Coldest on record January -22 °C
Warmest sea August 23 °C

What to expectSinp’o through the year

Sinp’o has a clear annual cycle: average daily highs run from -0.5 °C in January to 25 °C in August, a swing of 26 °C in mean temperature across the year.

Counted across a normal year, 29 days a year reach 25 °C, 1 of them reach 30 °C, 109 nights drop below freezing. The warmest reading in the 1991–2020 record is 34 °C, in August.

Rain is strongly seasonal. August averages 185 mm against 26 mm in February — 7.2 times as much. Planning around the dry months matters more here than planning around temperature.

The sea off Sinp’o is warmest in August at 23 °C and coldest in February at 4.4 °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	-0.5 °C	29 mm	41 %
February	1.3 °C	26 mm	40 %
March	5.8 °C	29 mm	44 %
April	11.9 °C	46 mm	47 %
May	16.9 °C	73 mm	54 %
June	20.6 °C	74 mm	65 %
July	24.0 °C	173 mm	70 %
August	24.8 °C	185 mm	66 %
September	21.2 °C	98 mm	53 %
October	15.9 °C	50 mm	41 %
November	8.4 °C	55 mm	41 %
December	1.9 °C	34 mm	37 %

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	-0.5 °C	-7.4 °C	-3.6 °C	8.3 °C	-21.9 °C	0	0	30
February	1.3 °C	-5.8 °C	-1.9 °C	11.9 °C	-17.7 °C	0	0	26
March	5.8 °C	-0.7 °C	2.7 °C	18.2 °C	-13.0 °C	0	0	17
April	11.9 °C	5.3 °C	8.6 °C	25.4 °C	-2.9 °C	0	0	2
May	16.9 °C	10.9 °C	13.9 °C	27.8 °C	3.3 °C	0	0	0
June	20.6 °C	15.8 °C	18.2 °C	30.2 °C	8.9 °C	2	0	0
July	24.0 °C	20.0 °C	22.0 °C	33.3 °C	12.9 °C	11	1	0
August	24.8 °C	20.8 °C	22.8 °C	33.9 °C	12.5 °C	13	1	0
September	21.2 °C	16.2 °C	18.8 °C	28.9 °C	8.2 °C	2	0	0
October	15.9 °C	10.1 °C	13.0 °C	25.0 °C	-0.2 °C	0	0	0
November	8.4 °C	2.8 °C	5.6 °C	18.0 °C	-11.0 °C	0	0	8
December	1.9 °C	-4.3 °C	-1.0 °C	11.8 °C	-18.5 °C	0	0	26

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	29 mm	6	9.6 h/day	41 %	67 %	18 km/h	5.8 °C
February	26 mm	5	11 h/day	40 %	67 %	19 km/h	4.4 °C
March	29 mm	6	12 h/day	44 %	67 %	20 km/h	4.8 °C
April	46 mm	5	13 h/day	47 %	69 %	20 km/h	7.7 °C
May	73 mm	7	14 h/day	54 %	76 %	18 km/h	12.0 °C
June	74 mm	7	15 h/day	65 %	84 %	15 km/h	16.9 °C
July	173 mm	12	15 h/day	70 %	87 %	16 km/h	20.9 °C
August	185 mm	12	14 h/day	66 %	85 %	15 km/h	23.1 °C
September	98 mm	8	12 h/day	53 %	78 %	15 km/h	21.3 °C
October	50 mm	7	11 h/day	41 %	70 %	18 km/h	17.5 °C
November	55 mm	8	10.0 h/day	41 %	65 %	19 km/h	12.7 °C
December	34 mm	6	9.3 h/day	37 %	63 %	18 km/h	8.3 °C

How Sinp’o 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
Sinp’o	25 °C	-7.4 °C	872 mm	29
Hŭngnam · North Korea	26 °C	-7.9 °C	1,075 mm	42
Hamhŭng · North Korea	26 °C	-11 °C	1,131 mm	52
Changam-ch’on · North Korea	26 °C	-12 °C	836 mm	59
Wŏnsan · North Korea	27 °C	-7.9 °C	1,274 mm	65
Hyesan · North Korea	25 °C	-22 °C	774 mm	40
Tŏkch’ŏn · North Korea	27 °C	-15 °C	1,409 mm	75

Where Sinp’o ranks

Ranking	Position	Value
The coolest places in Asia in May	14th of 50	17 °C
The coolest places in Asia in June	15th of 50	21 °C
The coolest places in Asia in April	28th of 50	12 °C
The coolest places in Asia in July	34th of 50	24 °C
Places with the best weather in Asia in June	35th of 50	90/100

Planning a trip? See the best time to visit Sinp’o.

QuestionsCommon questions about Sinp’o’s climate

When is the best time to visit Sinp’o?

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

How hot does Sinp’o get?

In August, the warmest month, daily highs average 25 °C. About 1 days a year pass 30 °C. The highest value in the 1991–2020 record is 34 °C.

How cold does it get in winter?

Nights average -7.4 °C in January, the coldest month. A normal year has 109 nights below freezing.

Which month is wettest in Sinp’o?

August, averaging 185 mm over 12 days with rain. The driest month is February with 26 mm. The year as a whole averages 872 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 Sinp’o 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: 40.040°, 128.194° (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.