Monthly Climate
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Best time to visit Rui’an

October is the best time to visit Rui’an for general sightseeing, with average highs of 24 °C and about 8 wet days. The comfortable season runs roughly October to November. The sea stays above 20 °C from May to October.

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 October comfort 90/100
A beach holiday October sea 23 °C
The least cloud October 51 % average cloud cover
The least rain December 50 mm
Warmth July 30 °C
Cooler weather January 12 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 October 90 24 °C 8 81
2 November 87 19 °C 8 52
3 April 79 20 °C 14 29
4 May 76 24 °C 16 58
5 December 69 14 °C 7 24
6 March 65 15 °C 14 7
7 September 63 28 °C 15 74
8 February 59 13 °C 10 10
9 January 58 12 °C 9 14
10 June 56 27 °C 19 74
11 July 45 30 °C 19 71
12 August 44 30 °C 22 69

For a beach holiday

October scores highest, with a sea temperature of 23 °C and air temperatures around 24 °C. The sea is above 20 °C from May to October.

Month Sea Air Sunshine Beach score
January 14 °C 12 °C 60 % 14
February 13 °C 13 °C 67 % 10
March 14 °C 15 °C 72 % 7
April 16 °C 20 °C 76 % 29
May 21 °C 24 °C 79 % 58
June 24 °C 27 °C 88 % 74
July 27 °C 30 °C 75 % 71
August 28 °C 30 °C 70 % 69
September 27 °C 28 °C 65 % 74
October 23 °C 24 °C 51 % 81
November 20 °C 19 °C 58 % 52
December 16 °C 14 °C 52 % 24

When to think twice

August scores lowest with about 22 wet days and highs near 30 °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 11.8 °C 56 mm 60 %
February 12.7 °C 63 mm 67 %
March 15.3 °C 110 mm 72 %
April 19.6 °C 124 mm 76 %
May 23.7 °C 184 mm 79 %
June 27.0 °C 284 mm 88 %
July 30.0 °C 201 mm 75 %
August 30.0 °C 266 mm 70 %
September 27.5 °C 181 mm 65 %
October 23.6 °C 80 mm 51 %
November 19.1 °C 72 mm 58 %
December 14.0 °C 50 mm 52 %

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.