Monthly Climate
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Best time to visit Dalian

September is the best time to visit Dalian for general sightseeing, with average highs of 23 °C and about 5 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 90/100
A beach holiday August sea 24 °C
The least cloud October 38 % average cloud cover
The least rain January 7 mm
Warmth August 27 °C
Cooler weather January -0.2 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 September 90 23 °C 5 83
2 June 86 22 °C 7 57
3 October 83 17 °C 5 47
4 May 81 17 °C 7 29
5 July 72 26 °C 10 78
6 August 70 27 °C 9 86
7 April 61 12 °C 5 20
8 November 51 9.5 °C 4 22
9 March 37 6.0 °C 3 25
10 February 33 1.6 °C 2 25
11 January 33 -0.2 °C 2 25
12 December 32 2.8 °C 3 25

For a beach holiday

August scores highest, with a sea temperature of 24 °C and air temperatures around 27 °C. The sea is above 20 °C from July to September.

Month Sea Air Sunshine Beach score
January 5.1 °C -0.2 °C 43 % 25
February 3.3 °C 1.6 °C 40 % 25
March 3.9 °C 6.0 °C 40 % 25
April 7.1 °C 12 °C 43 % 20
May 12 °C 17 °C 48 % 29
June 17 °C 22 °C 55 % 57
July 22 °C 26 °C 58 % 78
August 24 °C 27 °C 52 % 86
September 23 °C 23 °C 44 % 83
October 19 °C 17 °C 38 % 47
November 14 °C 9.5 °C 42 % 22
December 9.3 °C 2.8 °C 46 % 25

When to think twice

December scores lowest with about 3 wet days and highs near 2.8 °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 7 mm 43 %
February 1.6 °C 11 mm 40 %
March 6.0 °C 16 mm 40 %
April 11.9 °C 38 mm 43 %
May 17.5 °C 62 mm 48 %
June 22.3 °C 84 mm 55 %
July 25.7 °C 141 mm 58 %
August 26.5 °C 141 mm 52 %
September 23.1 °C 53 mm 44 %
October 16.9 °C 30 mm 38 %
November 9.5 °C 27 mm 42 %
December 2.8 °C 12 mm 46 %

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.