Monthly Climate
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Best time to visit Hamhŭng

September is the best time to visit Hamhŭng for general sightseeing, with average highs of 22 °C and about 9 wet days. The comfortable season runs roughly May to June. The sea stays above 20 °C from July to September.

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 89/100
A beach holiday August sea 24 °C
The least cloud December 35 % average cloud cover
The least rain February 35 mm
Warmth August 26 °C
Cooler weather January -0.6 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 September 89 22 °C 9 68
2 May 87 19 °C 8 33
3 June 87 23 °C 10 53
4 October 77 17 °C 8 38
5 July 72 26 °C 15 67
6 August 70 26 °C 16 73
7 April 68 14 °C 7 18
8 November 45 8.7 °C 8 14
9 March 38 7.1 °C 7 16
10 December 38 1.8 °C 6 19
11 February 37 1.7 °C 6 19
12 January 37 -0.6 °C 7 18

For a beach holiday

August scores highest, with a sea temperature of 24 °C and air temperatures around 26 °C. The sea is above 20 °C from July to September.

Month Sea Air Sunshine Beach score
January 5.3 °C -0.6 °C 37 % 18
February 4.0 °C 1.7 °C 38 % 19
March 4.5 °C 7.1 °C 44 % 16
April 7.7 °C 14 °C 48 % 18
May 12 °C 19 °C 55 % 33
June 18 °C 23 °C 66 % 53
July 22 °C 26 °C 73 % 67
August 24 °C 26 °C 69 % 73
September 22 °C 22 °C 56 % 68
October 18 °C 17 °C 42 % 38
November 13 °C 8.7 °C 42 % 14
December 8.1 °C 1.8 °C 35 % 19

When to think twice

January scores lowest with about 7 wet days and highs near -0.6 °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 -0.6 °C 39 mm 37 %
February 1.7 °C 35 mm 38 %
March 7.1 °C 43 mm 44 %
April 14.2 °C 59 mm 48 %
May 19.5 °C 85 mm 55 %
June 23.0 °C 103 mm 66 %
July 25.7 °C 222 mm 73 %
August 26.0 °C 241 mm 69 %
September 22.1 °C 125 mm 56 %
October 16.6 °C 65 mm 42 %
November 8.7 °C 72 mm 42 %
December 1.8 °C 42 mm 35 %

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.