Tarakan weather in September

In September, Tarakan sees average daytime highs of 29°C and overnight lows near 25°C, with 227 mm of rain across 27.2 wet days and about 12 hours of daylight. It is the 3rd-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 15% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 06 min at the start of September to 12 hours by month's end. Set against the rest of the year, September is Tarakan's 3rd-clearest and 7th-windiest month. For the whole year in context, see Tarakan's year-round climate.

Daytime high
29°
3rd warmest
Overnight low
25°
6th coldest
Rainfall
227 mm
27.2 wet days
Daylight
12 hours
6:03 AM – 6:04 PM
Cloud cover
70%
3rd clearest
Wind
8 km/h
7th windiest
Solar energy
5.54 kWh/m²
Travel score
3.3
out of 10

Tarakan is city in North Kalimantan Province, Indonesia.

Density
1,018/km²
people per km²
Founded
1997

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 29°C through the month.

A typical September day in Tarakan reaches about 29°C in the afternoon and slips back to 25°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 30°C. Set against its neighbours, September runs on par with August and on par with October.

20°23°25°28°30°151015202530
Avg high (°C)Avg low (°C)
12925
22925
32925
42925
52925
62925
72925
82925
92925
102925
112925
122925
132925
142925
152925
162926
172926
182926
192926
202926
212926
222926
232926
242926
252926
262926
272926
282926
292926
302926

How September really feels in Tarakan

Once humidity and wind are folded in, September averages 30 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
30
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Tarakan weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 25°26026.811.83.7
Feb28° / 25°20924.911.93.7
Mar28° / 25°23528.5123.4
Apr29° / 26°22627.912.13.3
May29° / 26°24929.312.13.1
Jun29° / 26°21726.912.23.3
Jul29° / 26°21026.812.23.4
Aug29° / 26°21126.512.13.4
Sep29° / 25°22727.2123.3
Oct29° / 26°26029.411.93.1
Nov29° / 25°2782911.83.1
Dec28° / 25°29829.911.83.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 15% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 67%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13961
23961
33862
43862
53862
63862
73565
83565
93466
103466
113367
123268
133268
143169
153169
163169
173070
183070
193070
203070
213169
223169
233169
243169
253169
263268
273268
283169
293169
303169

Chance of precipitation in September

Any precipitation

Tarakan gets around 227 mm of rain over 27.2 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 91% and peaks near 93% on the wettest days.

0%20%40%60%80%100%151015202530
Rain chance (%)
192
292
392
491
591
691
791
891
991
1091
1191
1291
1390
1490
1590
1690
1790
1890
1990
2090
2190
2291
2391
2491
2591
2692
2792
2892
2993
3093

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 51% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
15644
25644
35644
45644
55644
65644
75545
85545
95545
105446
115446
125347
135347
145248
155149
165149
175050
184951
194951
204852
214852
224753
234753
244753
254753
264654
274654
284654
294654
304654

Wind in September

Winds average 8 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 06 min at the start of September to 12 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over September. Sunrise moves from 6:07 AM to 6:00 AM, and sunset from 6:11 PM to 5:58 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.16:076:11
212.16:076:11
312.16:076:10
412.16:076:10
512.16:066:10
612.06:066:09
712.06:066:09
812.06:066:08
912.06:056:08
1012.06:056:07
1112.06:056:07
1212.06:056:06
1312.06:046:06
1412.06:046:05
1512.06:046:05
1612.06:036:04
1712.06:036:04
1812.06:036:04
1912.06:036:03
2012.06:026:03
2112.06:026:02
2212.06:026:02
2312.06:016:01
2412.06:016:01
2512.06:016:00
2612.06:016:00
2712.06:005:59
2812.06:005:59
2912.06:005:59
3012.06:005:58

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.54 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.6 kWh/m² to a high of 5.54 kWh/m² in September across the year — September's 5.54 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.6Bright
55.6Bright
65.6Bright
75.6Bright
85.6Bright
95.6Bright
105.6Bright
115.6Bright
125.6Bright
135.6Bright
145.6Bright
155.6Bright
165.6Bright
175.6Bright
185.5Bright
195.5Bright
205.5Bright
215.5Bright
225.5Bright
235.5Bright
245.5Bright
255.5Bright
265.5Bright
275.5Bright
285.4Bright
295.4Bright
305.4Bright
Planning a trip in September

Hazard calendar for Tarakan

In seasonPeak

In September, Tarakan sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.

Tarakan sits in the Pacific typhoon belt; the season peaks July–October.

Pacific typhoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Tarakan?

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

3.3
Sightseeing
6th-best month of the year
4.1
Beach & pool
4th-best month of the year

September is a weaker month for outdoor sightseeing in Tarakan.

What to pack for Tarakan in September

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

In September, Tarakan sees daytime highs around 29°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 27 days see rain.

light clothesrain gearsun protection

Sea temperature near Tarakan in September

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

The sea at the nearest coast (about 21 km away) is warmest in May at about 30°C and coldest in January 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
Nov29Tropical
Dec29Tropical

UV index in Tarakan in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Tarakan peaks around March 15 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 11 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 15UV 15Dec 15UV 11
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar15Extreme
Apr15Extreme
May14Extreme
Jun12Extreme
Jul11Extreme
Aug13Extreme
Sep14Extreme
Oct13Extreme
Nov12Extreme
Dec11Extreme

Air quality in Tarakan in September

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Tarakan is worst in September — around 28 µg/m³ PM2.5 (moderate), about 3.8× the cleanest month (January, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1327 µg/m³Jan 137 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb8Good
Mar10Good
Apr11Good
May9Good
Jun10Good
Jul13Moderate
Aug22Moderate
Sep28Moderate
Oct15Moderate
Nov8Good
Dec8Good
Location & terrain

Where is Tarakan?

Tarakan sits at 3.3°N, 117.6°E, 29 m above sea level, in Indonesia. The nearest listed city is Tanjung Selor, 59 km away.

Topography around Tarakan

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

Within 3 km, the terrain around Tarakan has only modest variations in elevation — a maximum elevation change of 107 m around an average of 18 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 116 m; within 80 km, large variations in elevation — a maximum elevation change of 1,016 m.

The land around Tarakan is covered by trees (37%) and artificial surfaces (36%) within 3 km, water (64%) and trees (22%) within 16 km, and water (47%) and trees (40%) within 80 km.

3 km
107 m
16 km
116 m
80 km
1,016 m
treesgrasslandartificial surfacesbare terrainwatermangroves
September weather nearby: Tanjung Selor 59 km · Nunukan 92 km · Tawau 109 km · Malinau 112 km · Semporna 172 km · Lahad Datu 207 km · Bandar Nabawan 231 km · Sitangkai 250 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 Tarakan (3.3133°, 117.5915°, elevation 29 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).