Pekalongan weather in January

In January, Pekalongan sees average daytime highs of 27°C and overnight lows near 23°C, with 411 mm of rain across 30.4 wet days and about 12.4 hours of daylight. It is the 10th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 1% of the time in January, and the air most often feels oppressive.

Daylight stretches from about 12 h 24 min at the start of January to 12 h 18 min by month's end. Set against the rest of the year, January is Pekalongan's 10th-clearest and 2nd-windiest month. For the whole year in context, see Pekalongan's year-round climate.

Daytime high
27°
10th warmest
Overnight low
23°
6th coldest
Rainfall
411 mm
30.4 wet days
Daylight
12 h 24 min
5:40 AM – 6:01 PM
Cloud cover
91%
10th clearest
Wind
7 km/h
2nd windiest
Solar energy
4.59 kWh/m²
Travel score
3.3
out of 10

Pekalongan is city in Central Java Province, Indonesia.

Density
7,173/km²
people per km²
Founded
1906

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 27°C through the month.

A typical January day in Pekalongan reaches about 27°C in the afternoon and slips back to 23°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 29°C. Set against its neighbours, January runs on par with December and on par with February.

20°23°25°28°30°151015202531
Avg high (°C)Avg low (°C)
12823
22823
32823
42823
52823
62823
72823
82823
92823
102823
112823
122823
132723
142723
152723
162723
172723
182723
192723
202723
212723
222723
232723
242723
252723
262723
272723
282723
292723
302723
312723

Pekalongan weather by month

How January compares with the rest of the year at a glance. January is the 10th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 23°41130.412.43.3
Feb27° / 23°38027.612.23.2
Mar28° / 23°41430.2123.2
Apr28° / 23°37728.411.93.2
May28° / 23°20223.311.74.0
Jun28° / 23°14817.211.65.1
Jul27° / 22°10314.411.65.8
Aug28° / 22°7611.811.86.1
Sep28° / 22°12314.8125.4
Oct28° / 23°29322.712.24.1
Nov28° / 23°46528.312.33.3
Dec28° / 23°51729.612.43.3

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 1% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 4% of January, with mostly cloudy or overcast conditions the remaining 95%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1595
2694
3694
4694
5694
6694
7694
8694
9694
10694
11694
12694
13694
14694
15694
16694
17595
18496
19496
20496
21397
22397
23397
24397
25298
26298
27298
28298
29199
30199
31199

Chance of precipitation in January

Any precipitation

Pekalongan gets around 411 mm of rain over 30.4 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 98% and peaks near 100% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
196
296
396
496
597
697
797
897
997
1097
1197
1297
1397
1498
1598
1698
1798
1898
1999
2099
2199
2299
2399
2499
2599
2699
2799
2899
29100
30100
31100

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

Most of January feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, January lands in the oppressive band about 98% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)
1298
2298
3397
4397
5397
6397
7397
8397
9397
10397
11397
12298
13298
14298
15298
16298
17298
18199
19199
20199
21199
22199
23199
24199
25199
26199
27199
280100
290100
300100
310100

Wind in January

Winds average 7 km/h in January.

Across January, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 12 h 24 min at the start of January to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over January. Sunrise moves from 5:33 AM to 5:46 AM, and sunset from 5:56 PM to 6:04 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:335:56
212.45:335:57
312.45:345:57
412.45:345:57
512.45:355:58
612.45:355:58
712.45:365:59
812.45:365:59
912.45:375:59
1012.45:376:00
1112.45:376:00
1212.45:386:00
1312.45:386:01
1412.45:396:01
1512.45:396:01
1612.45:406:01
1712.45:406:02
1812.45:416:02
1912.45:416:02
2012.35:426:02
2112.35:426:03
2212.35:426:03
2312.35:436:03
2412.35:436:03
2512.35:436:03
2612.35:446:03
2712.35:446:03
2812.35:456:03
2912.35:456:04
3012.35:456:04
3112.35:466:04

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 4.59 kWh/m².

For context, solar energy here swings from a low near 4.56 kWh/m² to a high of 5.99 kWh/m² in September across the year — January's 4.59 kWh/m² sits near the bottom.

024151015202531
Solar energy (kWh/m²)Level
14.6Bright
24.6Bright
34.6Bright
44.6Bright
54.6Bright
64.6Bright
74.6Bright
84.7Bright
94.7Bright
104.7Bright
114.7Bright
124.6Bright
134.6Bright
144.6Bright
154.6Bright
164.6Bright
174.6Bright
184.6Bright
194.6Bright
204.5Bright
214.5Bright
224.5Bright
234.5Bright
244.5Bright
254.5Bright
264.5Bright
274.5Bright
284.5Bright
294.5Bright
304.5Bright
314.5Bright
Planning a trip in January

Hazard calendar for Pekalongan

In seasonPeak

In January, Pekalongan sits inside its cyclone and rainy season season. The full year is below, with each hazard's peak months called out.

Pekalongan sits in the South Indian Ocean cyclone belt; the season peaks January–March.

Pekalongan's rainy season runs October–April, when most of the year's rain falls.

Cyclone
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is January a good time to visit Pekalongan?

Our two travel scores rate January for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

3.3
Sightseeing
7th-best month of the year
3.4
Beach & pool
11th-best month of the year

January is a weaker month for outdoor sightseeing in Pekalongan.

What to pack for Pekalongan in January

From January's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In January, Pekalongan sees daytime highs around 27°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 30 days see rain.

light clothesrain gearsun protection

Sea temperature near Pekalongan in January

The nearest coast averages about 29°C in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in May at about 30°C and coldest in February near 29°C.

The water stays above 20°C all year — warm enough for a swim any month.

28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb29Tropical
Mar29Tropical
Apr30Tropical
May30Tropical
Jun30Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov30Tropical
Dec30Tropical

UV index in Pekalongan in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Pekalongan peaks around March 13 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 15 at about 6 (high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 13UV 14Nov 15UV 6
UV index (midday)Level
Jan11Extreme
Feb13Extreme
Mar14Extreme
Apr11Extreme
May8Very high
Jun7Very high
Jul9Very high
Aug11Extreme
Sep12Extreme
Oct11Extreme
Nov6High
Dec12Extreme

Air quality in Pekalongan in January

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where January falls, not just the annual average.

Air quality in Pekalongan is worst in May — around 42 µg/m³ PM2.5 (poor), and holds fairly steady the rest of the year.

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModeratePoorModerateMay 1641 µg/m³Feb 1231 µg/m³
PM2.5 (µg/m³)Level
Jan33Moderate
Feb31Moderate
Mar37Poor
Apr38Poor
May42Poor
Jun38Poor
Jul35Moderate
Aug35Moderate
Sep36Poor
Oct37Poor
Nov34Moderate
Dec33Moderate
Location & terrain

Where is Pekalongan?

Pekalongan sits at 6.9°S, 109.7°E, 10 m above sea level, in Indonesia. The nearest listed city is Wiradesa, 6.0 km away.

Topography around Pekalongan

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Pekalongan.

Within 3 km, the terrain around Pekalongan has only modest variations in elevation — a maximum elevation change of 15 m around an average of 4 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 254 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,396 m.

The land around Pekalongan is covered by artificial surfaces (60%) within 3 km, water (42%) and trees (24%) within 16 km, and trees (47%) and water (35%) within 80 km.

3 km
15 m
16 km
254 m
80 km
3,396 m
treesgrasslandcroplandartificial surfaceswaterwetland
January weather nearby: Wiradesa 6.0 km · Kedungwuni 10 km · Wonopringgo 12 km · Comal 16 km · Buaran 23 km · Pemalang 32 km · Weleri 44 km · Randudongkal 45 km

Indonesia travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 29% of US
price level, 2025
GDP per capita
$5,060
2025
Happiness
5.6 / 10
World Happiness, 2025
Safe drinking water
30%
of population, 2024
Homicide rate
0.3
per 100k, 2022
Road deaths
11.3
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 471
Religion
Muslim 87%Protestant 8%Roman Catholic 3%Hindu 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Pekalongan (-6.8886°, 109.6753°, elevation 10 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).