Bintulu climate

Name: Bintulu
Address: MY

Bintulu is warmest in May, with average highs of 31 °C, and coldest in January, when nights average 23 °C. December is the wettest month (392 mm) and July the driest (211 mm). Figures are 1991–2020 climate normals.

Across a full year Bintulu averages 3,355 mm of rain and 364 days above 25 °C.

Malaysia · population 151,617 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month May 31 °C
Coldest month January 23 °C
Driest month July 211 mm
Wettest month December 392 mm
Least cloud July 84 % cloud
Hottest on record February 39 °C
Coldest on record February 20 °C
Warmest sea May 30 °C

What to expectBintulu through the year

Bintulu changes little through the year. Average daily highs stay between 29 and 31 °C, so no month stands out as a season in the way it would further from the equator.

Counted across a normal year, 364 days a year reach 25 °C, 192 of them reach 30 °C. The warmest reading in the 1991–2020 record is 39 °C, in February.

Rain is spread fairly evenly through the year, from 211 mm in July to 392 mm in December. There is no dry season to aim for.

The sea off Bintulu is warmest in May at 30 °C and coldest in February at 28 °C. Sea temperature lags the air by a month or two, which is why late summer swims warmer than early summer at the same air temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	29.1 °C	341 mm	91 %
February	29.3 °C	255 mm	90 %
March	30.0 °C	241 mm	88 %
April	30.4 °C	257 mm	87 %
May	30.7 °C	259 mm	86 %
June	30.5 °C	223 mm	84 %
July	30.5 °C	211 mm	84 %
August	30.6 °C	240 mm	85 %
September	30.4 °C	265 mm	88 %
October	29.8 °C	322 mm	92 %
November	29.5 °C	348 mm	93 %
December	29.2 °C	392 mm	94 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	29.1 °C	23.2 °C	25.5 °C	32.0 °C	21.1 °C	31	7
February	29.3 °C	23.3 °C	25.7 °C	38.6 °C	20.0 °C	28	8
March	30.0 °C	23.5 °C	26.1 °C	32.9 °C	21.5 °C	31	16
April	30.4 °C	23.9 °C	26.5 °C	34.9 °C	21.4 °C	30	21
May	30.7 °C	24.2 °C	26.9 °C	34.1 °C	22.3 °C	31	23
June	30.5 °C	24.0 °C	26.7 °C	34.1 °C	22.3 °C	30	21
July	30.5 °C	23.8 °C	26.6 °C	34.4 °C	21.8 °C	31	20
August	30.6 °C	23.8 °C	26.6 °C	35.4 °C	21.8 °C	31	22
September	30.4 °C	23.6 °C	26.4 °C	34.2 °C	22.1 °C	30	20
October	29.8 °C	23.4 °C	26.0 °C	32.6 °C	22.0 °C	31	15
November	29.5 °C	23.4 °C	25.8 °C	32.2 °C	21.1 °C	30	11
December	29.2 °C	23.3 °C	25.6 °C	31.9 °C	21.8 °C	31	8

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	341 mm	27	12 h/day	91 %	89 %	10 km/h	28.3 °C
February	255 mm	23	12 h/day	90 %	88 %	11 km/h	28.0 °C
March	241 mm	26	12 h/day	88 %	88 %	9.8 km/h	28.5 °C
April	257 mm	27	12 h/day	87 %	88 %	8.8 km/h	29.5 °C
May	259 mm	26	12 h/day	86 %	88 %	8.3 km/h	30.1 °C
June	223 mm	23	12 h/day	84 %	87 %	8.3 km/h	30.1 °C
July	211 mm	22	12 h/day	84 %	86 %	8.5 km/h	30.0 °C
August	240 mm	24	12 h/day	85 %	86 %	8.9 km/h	30.1 °C
September	265 mm	25	12 h/day	88 %	87 %	9.0 km/h	29.8 °C
October	322 mm	29	12 h/day	92 %	89 %	9.4 km/h	29.6 °C
November	348 mm	29	12 h/day	93 %	90 %	9.3 km/h	29.3 °C
December	392 mm	29	12 h/day	94 %	90 %	9.6 km/h	29.0 °C

How Bintulu compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Bintulu	31 °C	23 °C	3,355 mm	364
Sibu · Malaysia	30 °C	23 °C	2,994 mm	364
Miri · Malaysia	30 °C	24 °C	2,631 mm	365
Bandar Seri Begawan · Brunei	30 °C	24 °C	2,363 mm	365
Kuching · Malaysia	31 °C	23 °C	3,507 mm	364
Kota Kinabalu · Malaysia	29 °C	23 °C	2,615 mm	364

Where Bintulu ranks

Ranking	Position	Value
Warmest sea temperatures in Asia year-round	23rd of 50	29 °C
Warmest sea temperatures in Asia in August	24th of 50	30 °C
Warmest sea temperatures in the world year-round	24th of 50	29 °C
Warmest sea temperatures in Asia in September	27th of 50	30 °C
Warmest sea temperatures in Asia in October	30th of 50	30 °C
Warmest sea temperatures in the world in August	30th of 50	30 °C

Planning a trip? See the best time to visit Bintulu.

QuestionsCommon questions about Bintulu’s climate

When is the best time to visit Bintulu?

That depends on what you want, so the honest answer is a comparison rather than a single month. January, February, December sit closest to 20 °C on average, May is the warmest month and July the driest. The month-by-month table above has the full picture.

How hot does Bintulu get?

In May, the warmest month, daily highs average 31 °C. About 192 days a year pass 30 °C. The highest value in the 1991–2020 record is 39 °C.

How cold does it get in winter?

Nights average 23 °C in January, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Bintulu?

December, averaging 392 mm over 29 days with rain. The driest month is July with 211 mm. The year as a whole averages 3,355 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Bintulu rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Data point: 3.167°, 113.033° (the coordinates the reanalysis values are taken for)
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. 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.