Monthly Climate
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Best time to visit Gangneung

May is the best time to visit Gangneung for general sightseeing, with average highs of 20 °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 May comfort 89/100
A beach holiday August sea 24 °C
The least cloud December 39 % average cloud cover
The least rain December 36 mm
Warmth August 26 °C
Cooler weather January 2.5 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 May 89 20 °C 9 33
2 June 86 23 °C 11 53
3 October 85 18 °C 8 47
4 September 84 22 °C 13 63
5 April 71 15 °C 9 16
6 July 69 26 °C 16 68
7 August 65 26 °C 17 74
8 November 60 11 °C 7 23
9 March 46 9.1 °C 9 12
10 December 39 5.1 °C 5 21
11 January 37 2.5 °C 5 20
12 February 36 4.5 °C 6 19

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 10 °C 2.5 °C 43 % 20
February 9.0 °C 4.5 °C 46 % 19
March 9.4 °C 9.1 °C 51 % 12
April 12 °C 15 °C 53 % 16
May 14 °C 20 °C 57 % 33
June 18 °C 23 °C 66 % 53
July 22 °C 26 °C 74 % 68
August 24 °C 26 °C 70 % 74
September 22 °C 22 °C 63 % 63
October 19 °C 18 °C 48 % 47
November 16 °C 11 °C 44 % 23
December 13 °C 5.1 °C 39 % 21

When to think twice

February scores lowest with about 6 wet days and highs near 4.5 °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 2.5 °C 44 mm 43 %
February 4.5 °C 45 mm 46 %
March 9.1 °C 67 mm 51 %
April 14.9 °C 79 mm 53 %
May 19.6 °C 87 mm 57 %
June 22.6 °C 121 mm 66 %
July 25.6 °C 222 mm 74 %
August 26.2 °C 247 mm 70 %
September 22.3 °C 190 mm 63 %
October 17.9 °C 85 mm 48 %
November 11.5 °C 62 mm 44 %
December 5.1 °C 36 mm 39 %

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.