Monthly Climate
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Best time to visit Sunch’ŏn

September is the best time to visit Sunch’ŏn for general sightseeing, with average highs of 24 °C and about 8 wet days. The comfortable season runs roughly May to June.

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 90/100
The least cloud January 37 % average cloud cover
The least rain January 14 mm
Warmth August 28 °C
Cooler weather January -1.5 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days
1 September 90 24 °C 8
2 May 89 22 °C 9
3 June 80 26 °C 12
4 October 80 17 °C 6
5 April 71 16 °C 8
6 August 65 28 °C 15
7 July 62 28 °C 18
8 March 46 8.8 °C 6
9 November 42 8.3 °C 8
10 February 40 2.5 °C 4
11 January 39 -1.5 °C 3
12 December 38 0.4 °C 6

When to think twice

December scores lowest with about 6 wet days and highs near 0.4 °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 -1.5 °C 14 mm 37 %
February 2.5 °C 24 mm 40 %
March 8.8 °C 31 mm 47 %
April 15.9 °C 63 mm 50 %
May 21.6 °C 105 mm 55 %
June 25.8 °C 131 mm 65 %
July 27.5 °C 341 mm 76 %
August 27.8 °C 265 mm 68 %
September 23.9 °C 111 mm 54 %
October 17.2 °C 56 mm 43 %
November 8.3 °C 59 mm 46 %
December 0.4 °C 29 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.