Monthly Climate
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Best time to visit Namp’o

September is the best time to visit Namp’o for general sightseeing, with average highs of 24 °C and about 6 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 91/100
A beach holiday September sea 22 °C
The least cloud February 43 % average cloud cover
The least rain January 13 mm
Warmth August 28 °C
Cooler weather January -0.2 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 September 91 24 °C 6 84
2 May 91 22 °C 8 42
3 October 84 18 °C 6 52
4 June 83 26 °C 9 60
5 April 73 16 °C 6 25
6 August 64 28 °C 14 74
7 July 63 28 °C 15 64
8 November 49 9.6 °C 7 18
9 March 45 8.6 °C 4 23
10 January 37 -0.2 °C 3 25
11 February 37 2.8 °C 4 24
12 December 36 2.2 °C 5 21

For a beach holiday

September scores highest, with a sea temperature of 22 °C and air temperatures around 24 °C. The sea is above 20 °C from July to September.

Month Sea Air Sunshine Beach score
January 3.4 °C -0.2 °C 47 % 25
February 1.2 °C 2.8 °C 43 % 24
March 2.5 °C 8.6 °C 44 % 23
April 6.6 °C 16 °C 48 % 25
May 11 °C 22 °C 53 % 42
June 16 °C 26 °C 62 % 60
July 21 °C 28 °C 72 % 64
August 23 °C 28 °C 65 % 74
September 22 °C 24 °C 56 % 84
October 19 °C 18 °C 46 % 52
November 14 °C 9.6 °C 50 % 18
December 8.4 °C 2.2 °C 50 % 21

When to think twice

December scores lowest with about 5 wet days and highs near 2.2 °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 -0.2 °C 13 mm 47 %
February 2.8 °C 18 mm 43 %
March 8.6 °C 24 mm 44 %
April 15.9 °C 48 mm 48 %
May 21.6 °C 89 mm 53 %
June 26.0 °C 104 mm 62 %
July 28.0 °C 250 mm 72 %
August 28.2 °C 208 mm 65 %
September 24.3 °C 91 mm 56 %
October 17.9 °C 41 mm 46 %
November 9.6 °C 43 mm 50 %
December 2.2 °C 23 mm 50 %

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.