Monthly Climate
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Best time to visit Keelung

April is the best time to visit Keelung for general sightseeing, with average highs of 24 °C and about 15 wet days. The comfortable season runs roughly November to April.

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 April comfort 75/100
A beach holiday May sea 25 °C
The least cloud August 62 % average cloud cover
The least rain April 134 mm
Warmth July 31 °C
Cooler weather January 18 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 April 75 24 °C 15 67
2 March 74 21 °C 18 53
3 February 71 19 °C 17 43
4 December 69 19 °C 20 50
5 November 68 23 °C 19 64
6 January 66 18 °C 20 40
7 October 61 25 °C 19 73
8 May 61 27 °C 17 75
9 September 52 28 °C 18 73
10 June 51 29 °C 17 73
11 July 49 31 °C 14 69
12 August 46 30 °C 17 68

For a beach holiday

May scores highest, with a sea temperature of 25 °C and air temperatures around 27 °C. The sea never reaches 20 °C here.

Month Sea Air Sunshine Beach score
January 21 °C 18 °C 79 % 40
February 21 °C 19 °C 78 % 43
March 22 °C 21 °C 74 % 53
April 24 °C 24 °C 73 % 67
May 25 °C 27 °C 75 % 75
June 27 °C 29 °C 81 % 73
July 28 °C 31 °C 65 % 69
August 28 °C 30 °C 62 % 68
September 27 °C 28 °C 64 % 73
October 26 °C 25 °C 70 % 73
November 24 °C 23 °C 74 % 64
December 23 °C 19 °C 78 % 50

When to think twice

August scores lowest with about 17 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 18.0 °C 185 mm 79 %
February 18.7 °C 164 mm 78 %
March 20.9 °C 146 mm 74 %
April 24.0 °C 134 mm 73 %
May 26.8 °C 190 mm 75 %
June 29.3 °C 183 mm 81 %
July 30.6 °C 151 mm 65 %
August 30.2 °C 228 mm 62 %
September 28.4 °C 262 mm 64 %
October 25.3 °C 327 mm 70 %
November 22.8 °C 275 mm 74 %
December 19.5 °C 226 mm 78 %

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.