Monthly Climate
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Best time to visit Chongjin

September is the best time to visit Chongjin for general sightseeing, with average highs of 20 °C and about 11 wet days.

It depends what you are going for

One month rarely wins on everything. These are the best months on each measure taken on its own.

If you want Best month On that measure
Sightseeing and walking September comfort 86/100
A beach holiday August sea 22 °C
The least cloud February 40 % average cloud cover
The least rain February 26 mm
Warmth August 24 °C
Cooler weather January -4.0 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 September 86 20 °C 11 52
2 June 77 19 °C 13 20
3 July 74 23 °C 17 48
4 August 72 24 °C 18 62
5 October 69 15 °C 9 23
6 May 65 15 °C 13 9
7 April 50 10 °C 9 13
8 February 36 -1.7 °C 6 19
9 March 35 3.6 °C 6 18
10 November 35 6.2 °C 9 13
11 January 33 -4.0 °C 8 14
12 December 31 -1.3 °C 10 11

For a beach holiday

August scores highest, with a sea temperature of 22 °C and air temperatures around 24 °C. The sea never reaches 20 °C here.

Month Sea Air Sunshine Beach score
January 4.3 °C -4.0 °C 42 % 14
February 3.0 °C -1.7 °C 40 % 19
March 3.2 °C 3.6 °C 43 % 18
April 5.5 °C 10 °C 52 % 13
May 9.0 °C 15 °C 63 % 9
June 14 °C 19 °C 72 % 20
July 19 °C 23 °C 77 % 48
August 22 °C 24 °C 70 % 62
September 20 °C 20 °C 52 % 52
October 16 °C 15 °C 41 % 23
November 12 °C 6.2 °C 43 % 13
December 7.4 °C -1.3 °C 44 % 11

When to think twice

December scores lowest with about 10 wet days and highs near -1.3 °C. That does not make it a bad month — it depends entirely on what you are travelling for. The numbers are all here; the judgement is yours.

The full year

Month Avg high Rainfall Cloud
January -4.0 °C 38 mm 42 %
February -1.7 °C 26 mm 40 %
March 3.6 °C 33 mm 43 %
April 10.4 °C 51 mm 52 %
May 15.2 °C 91 mm 63 %
June 18.9 °C 104 mm 72 %
July 22.5 °C 190 mm 77 %
August 23.8 °C 208 mm 70 %
September 20.4 °C 112 mm 52 %
October 14.5 °C 56 mm 41 %
November 6.2 °C 59 mm 43 %
December -1.3 °C 51 mm 44 %

Data sources and method

Normal period
1991–2020
Dataset version
era5-1991-2020-scores1.1
Last processed

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: comfort score, beach score, season boundaries. 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.