Pekalongan climate

Name: Pekalongan
Address: ID

Pekalongan is warmest in September, with average highs of 31 °C, and coldest in July, when nights average 23 °C. December is the wettest month (496 mm) and August the driest (74 mm). Figures are 1991–2020 climate normals.

Across a full year Pekalongan averages 3,350 mm of rain and 365 days above 25 °C.

Indonesia · population 324,564 · 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 September 31 °C
Coldest month July 23 °C
Driest month August 74 mm
Wettest month December 496 mm
Least cloud August 60 % cloud
Hottest on record October 36 °C
Coldest on record July 19 °C
Warmest sea May 30 °C

What to expectPekalongan through the year

Pekalongan 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, 365 days a year reach 25 °C, 96 of them reach 30 °C. The warmest reading in the 1991–2020 record is 36 °C, in October.

Rain is strongly seasonal. December averages 496 mm against 74 mm in August — 6.7 times as much. Planning around the dry months matters more here than planning around temperature.

The sea off Pekalongan is warmest in May at 30 °C and coldest in February at 29 °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	28.3 °C	413 mm	92 %
February	28.2 °C	391 mm	94 %
March	28.7 °C	392 mm	88 %
April	29.1 °C	349 mm	83 %
May	29.4 °C	183 mm	70 %
June	29.3 °C	134 mm	64 %
July	29.4 °C	98 mm	61 %
August	30.0 °C	74 mm	60 %
September	30.8 °C	117 mm	65 %
October	30.6 °C	273 mm	74 %
November	29.4 °C	430 mm	86 %
December	28.8 °C	496 mm	92 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	28.3 °C	23.7 °C	25.6 °C	32.2 °C	21.7 °C	31	3
February	28.2 °C	23.7 °C	25.5 °C	31.8 °C	22.0 °C	28	1
March	28.7 °C	23.9 °C	26.0 °C	32.5 °C	21.1 °C	31	3
April	29.1 °C	24.2 °C	26.4 °C	31.8 °C	21.5 °C	30	4
May	29.4 °C	24.1 °C	26.5 °C	33.0 °C	20.4 °C	31	6
June	29.3 °C	23.5 °C	26.2 °C	33.1 °C	20.3 °C	30	5
July	29.4 °C	22.9 °C	26.0 °C	33.5 °C	18.6 °C	31	7
August	30.0 °C	23.0 °C	26.3 °C	33.5 °C	18.7 °C	31	14
September	30.8 °C	23.6 °C	27.0 °C	35.1 °C	19.7 °C	30	20
October	30.6 °C	24.3 °C	27.2 °C	35.7 °C	20.8 °C	31	18
November	29.4 °C	24.3 °C	26.5 °C	35.0 °C	22.0 °C	30	9
December	28.8 °C	24.0 °C	26.0 °C	33.1 °C	21.5 °C	31	5

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	413 mm	30	12 h/day	92 %	89 %	12 km/h	28.9 °C
February	391 mm	28	12 h/day	94 %	89 %	13 km/h	28.6 °C
March	392 mm	29	12 h/day	88 %	88 %	10 km/h	29.0 °C
April	349 mm	27	12 h/day	83 %	87 %	8.2 km/h	29.7 °C
May	183 mm	21	12 h/day	70 %	85 %	7.8 km/h	29.8 °C
June	134 mm	16	12 h/day	64 %	83 %	7.9 km/h	29.5 °C
July	98 mm	14	12 h/day	61 %	79 %	8.0 km/h	29.0 °C
August	74 mm	11	12 h/day	60 %	75 %	8.3 km/h	28.7 °C
September	117 mm	14	12 h/day	65 %	74 %	8.2 km/h	28.9 °C
October	273 mm	21	12 h/day	74 %	78 %	8.3 km/h	29.2 °C
November	430 mm	27	12 h/day	86 %	85 %	7.9 km/h	29.8 °C
December	496 mm	29	13 h/day	92 %	87 %	10.0 km/h	29.5 °C

How Pekalongan 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
Pekalongan	31 °C	23 °C	3,350 mm	365
Pemalang · Indonesia	31 °C	23 °C	3,084 mm	365
Tegal · Indonesia	32 °C	23 °C	2,945 mm	365
Purwokerto · Indonesia	30 °C	21 °C	2,989 mm	365
Semarang · Indonesia	32 °C	23 °C	2,324 mm	365
Ungaran · Indonesia	31 °C	21 °C	2,896 mm	358
Salatiga · Indonesia	30 °C	20 °C	2,934 mm	356

Where Pekalongan ranks

Ranking	Position	Value
Warmest sea temperatures in Asia in November	8th of 50	30 °C
Warmest sea temperatures in the world in November	8th of 50	30 °C
Warmest sea temperatures in Asia in December	15th of 50	30 °C
Warmest sea temperatures in the world in December	18th of 50	30 °C
Warmest sea temperatures in Asia in January	24th of 50	29 °C
Warmest sea temperatures in the world in January	36th of 50	29 °C

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

QuestionsCommon questions about Pekalongan’s climate

When is the best time to visit Pekalongan?

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, September is the warmest month and August the driest. The month-by-month table above has the full picture.

How hot does Pekalongan get?

In September, the warmest month, daily highs average 31 °C. About 96 days a year pass 30 °C. The highest value in the 1991–2020 record is 36 °C.

How cold does it get in winter?

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

Which month is wettest in Pekalongan?

December, averaging 496 mm over 29 days with rain. The driest month is August with 74 mm. The year as a whole averages 3,350 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 Pekalongan 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: -6.889°, 109.675° (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.