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Best time to visit Bukit Mertajam

December is the best time to visit Bukit Mertajam for general sightseeing, with average highs of 29 °C and about 23 wet days.

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 December comfort 51/100
A beach holiday December sea 29 °C
The least cloud February 69 % average cloud cover
The least rain February 131 mm
Warmth March 31 °C
Cooler weather November 29 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 December 51 29 °C 23 68
2 February 51 31 °C 18 63
3 January 51 30 °C 20 66
4 November 50 29 °C 28 68
5 October 50 29 °C 29 67
6 September 49 29 °C 25 65
7 July 48 30 °C 19 62
8 August 47 30 °C 22 63
9 June 46 30 °C 20 61
10 March 46 31 °C 24 61
11 April 46 30 °C 28 62
12 May 46 30 °C 26 61

For a beach holiday

December scores highest, with a sea temperature of 29 °C and air temperatures around 29 °C. The sea never reaches 20 °C here.

Month Sea Air Sunshine Beach score
January 29 °C 30 °C 74 % 66
February 30 °C 31 °C 69 % 63
March 30 °C 31 °C 73 % 61
April 30 °C 30 °C 81 % 62
May 30 °C 30 °C 87 % 61
June 30 °C 30 °C 83 % 61
July 30 °C 30 °C 85 % 62
August 30 °C 30 °C 86 % 63
September 30 °C 29 °C 88 % 65
October 30 °C 29 °C 90 % 67
November 29 °C 29 °C 88 % 68
December 29 °C 29 °C 83 % 68

When to think twice

May scores lowest with about 26 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 29.6 °C 168 mm 74 %
February 30.5 °C 131 mm 69 %
March 30.7 °C 199 mm 73 %
April 30.3 °C 241 mm 81 %
May 30.1 °C 229 mm 87 %
June 30.2 °C 139 mm 83 %
July 30.0 °C 132 mm 85 %
August 30.0 °C 172 mm 86 %
September 29.4 °C 215 mm 88 %
October 28.8 °C 337 mm 90 %
November 28.8 °C 368 mm 88 %
December 28.9 °C 259 mm 83 %

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.