Tanjung Balai weather in January

In January, Tanjung Balai sees average daytime highs of 27°C and overnight lows near 26°C, with 174 mm of rain across 18.6 wet days and about 11.9 hours of daylight. It is the 12th-warmest and 9th-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 8% of the time in January, and the air most often feels oppressive.

Daylight stretches from about 11 h 54 min at the start of January to 12 hours by month's end. Set against the rest of the year, January is Tanjung Balai's 10th-clearest and 1st-windiest month. For the whole year in context, see Tanjung Balai's year-round climate.

Daytime high
27°
12th warmest
Overnight low
26°
1st coldest
Rainfall
174 mm
18.6 wet days
Daylight
11 h 54 min
6:17 AM – 6:14 PM
Cloud cover
82%
10th clearest
Wind
20 km/h
1st windiest
Solar energy
5.04 kWh/m²
Travel score
4.9
out of 10

Tanjung Balai is capital of Karimun Regency, Riau Islands, Indonesia.

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 Tanjung Balai reaches about 27°C in the afternoon and slips back to 26°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 28°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)
12726
22726
32726
42726
52726
62726
72726
82726
92726
102726
112726
122726
132726
142726
152726
162726
172726
182726
192726
202726
212726
222726
232726
242726
252726
262726
272726
282726
292726
302726
312726

How January really feels in Tanjung Balai

Once humidity and wind are folded in, January averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

January sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Tanjung Balai weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 26°17418.611.94.9
Feb28° / 26°9813.3125.5
Mar28° / 26°16721.3124.4
Apr29° / 26°22026.4123.4
May29° / 27°23226.7123.4
Jun29° / 27°19122.512.13.8
Jul29° / 27°18622.512.14.0
Aug28° / 26°17422.8124.0
Sep28° / 26°16721.5124.1
Oct28° / 26°22024.6123.7
Nov28° / 26°32928.1123.5
Dec27° / 26°31925.811.93.9

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 8% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 9% of January, with mostly cloudy or overcast conditions the remaining 84%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11486
21486
31585
41585
51684
61783
71882
81882
91882
101981
111981
121981
131882
141882
151882
161882
171882
181783
191684
201684
211684
221783
231684
241684
251684
261585
271585
281585
291585
301585
311684

Chance of precipitation in January

Any precipitation

Tanjung Balai gets around 174 mm of rain over 18.6 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 60% and peaks near 69% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
169
267
366
465
564
664
763
862
961
1060
1160
1259
1359
1459
1559
1658
1758
1858
1958
2057
2158
2258
2358
2458
2558
2659
2758
2858
2958
3057
3156

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 86% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
118316
218316
318316
418316
518316
618415
718415
818415
918514
1018514
1118514
1218613
1318613
1418712
1518712
1628711
1728711
1828711
1928810
2028810
2128810
2228810
2328711
2428711
2528711
2628711
2728711
2828711
2928711
3028810
3128810

Wind in January

Winds average 20 km/h in January, the windiest month of the year.

Across January, daily wind ranges from about 20 km/h on the calmest days to 20 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
120light breeze
220light breeze
320light breeze
420light breeze
520light breeze
620light breeze
720light breeze
820light breeze
920light breeze
1020light breeze
1120light breeze
1220light breeze
1320light breeze
1420light breeze
1520light breeze
1620light breeze
1720light breeze
1820light breeze
1920light breeze
2020light breeze
2120light breeze
2220light breeze
2320light breeze
2420breezy
2520breezy
2620breezy
2720breezy
2820breezy
2920breezy
3020breezy
3120breezy

Sunrise & sunset in January

DaylightNight

Daylight runs from about 11 h 54 min at the start of January to 12 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over January. Sunrise moves from 6:11 AM to 6:21 AM, and sunset from 6:08 PM to 6:18 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:116:08
211.96:126:08
311.96:126:09
411.96:126:09
511.96:136:10
611.96:136:10
711.96:146:10
811.96:146:11
911.96:156:11
1011.96:156:12
1111.96:156:12
1211.96:166:13
1311.96:166:13
1411.96:166:13
1511.96:176:14
1611.96:176:14
1711.96:176:14
1811.96:186:15
1911.96:186:15
2011.96:186:15
2112.06:196:16
2212.06:196:16
2312.06:196:16
2412.06:206:17
2512.06:206:17
2612.06:206:17
2712.06:206:17
2812.06:206:18
2912.06:216:18
3012.06:216:18
3112.06:216:18

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 5.04 kWh/m².

For context, solar energy here swings from a low near 4.45 kWh/m² to a high of 5.79 kWh/m² in March across the year — January's 5.04 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
14.6Bright
24.7Bright
34.7Bright
44.7Bright
54.8Bright
64.8Bright
74.8Bright
84.9Bright
94.9Bright
104.9Bright
115.0Bright
125.0Bright
135.0Bright
145.1Bright
155.1Bright
165.1Bright
175.1Bright
185.1Bright
195.2Bright
205.2Bright
215.2Bright
225.2Bright
235.2Bright
245.2Bright
255.2Bright
265.2Bright
275.2Bright
285.2Bright
295.3Bright
305.3Bright
315.3Bright
Planning a trip in January

Is January a good time to visit Tanjung Balai?

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

4.9
Sightseeing
2nd-best month of the year
5.1
Beach & pool
2nd-best month of the year

January is a reasonable time to visit Tanjung Balai for sightseeing.

What to pack for Tanjung Balai in January

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

In January, Tanjung Balai sees daytime highs around 27°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 19 days see rain.

light clothesrain gearsun protection

Sea temperature near Tanjung Balai in January

The nearest coast averages about 28°C in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 15 km away) is warmest in May at about 30°C and coldest in January near 28°C.

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

26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan28Tropical
Feb28Tropical
Mar29Tropical
Apr30Tropical
May30Tropical
Jun30Tropical
Jul30Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec29Tropical

UV index in Tanjung Balai in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Tanjung Balai peaks around February 18 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeExtremeFeb 18UV 15Jun 22UV 10
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar14Extreme
Apr13Extreme
May12Extreme
Jun10Very high
Jul10Extreme
Aug13Extreme
Sep12Extreme
Oct13Extreme
Nov11Extreme
Dec11Extreme

Air quality in Tanjung Balai 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 Tanjung Balai is worst in September — around 45 µg/m³ PM2.5 (poor), about 1.8× the cleanest month (January, 26 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModeratePoorModerateSep 1845 µg/m³Jan 1026 µg/m³
PM2.5 (µg/m³)Level
Jan26Moderate
Feb29Moderate
Mar39Poor
Apr35Moderate
May29Moderate
Jun26Moderate
Jul31Moderate
Aug37Poor
Sep45Poor
Oct40Poor
Nov31Moderate
Dec26Moderate
Location & terrain

Where is Tanjung Balai?

Tanjung Balai sits at 1.0°N, 103.4°E, 9 m above sea level, in Indonesia. The nearest listed city is Boon Lay, 46 km away.

Topography around Tanjung Balai

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

Within 3 km, the terrain around Tanjung Balai has only modest variations in elevation — a maximum elevation change of 37 m around an average of 6 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 480 m; within 80 km, large variations in elevation — a maximum elevation change of 656 m.

The land around Tanjung Balai is covered by water (47%) and artificial surfaces (25%) within 3 km, water (72%) within 16 km, and water (60%) and trees (28%) within 80 km.

3 km
37 m
16 km
480 m
80 km
656 m
treesshrubsgrasslandartificial surfacesbare terrainwatermangroves
January weather nearby: Boon Lay 46 km · Iskandar Puteri 49 km · Jurong Town 50 km · Jurong East 51 km · Jurong West 51 km · Clementi Housing Estate 52 km · Hong Kah 52 km · Telok Blangah 53 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 Tanjung Balai (1.0001°, 103.4219°, elevation 9 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. 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).