Labuan weather in September

In September, Labuan sees average daytime highs of 29°C and overnight lows near 24°C, with 54 mm of rain across 8.6 wet days and about 12 hours of daylight. It is the 3rd-warmest and 11th-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 22% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 11 h 54 min at the start of September to 12 hours by month's end. Set against the rest of the year, September is Labuan's 4th-clearest and 1st-windiest month. For the whole year in context, see Labuan's year-round climate.

Daytime high
29°
3rd warmest
Overnight low
24°
2nd coldest
Rainfall
54 mm
8.6 wet days
Daylight
12 hours
5:52 AM – 5:50 PM
Cloud cover
63%
4th clearest
Wind
13 km/h
1st windiest
Solar energy
6.07 kWh/m²
Travel score
5.3
out of 10

Labuan is city in Banten district, Indonesia.

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 Labuan reaches about 29°C in the afternoon and slips back to 24°C overnight — a 5°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°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12924
22924
32924
42924
52924
62924
72924
82924
92924
102924
112924
122924
132924
142924
152924
162924
172924
182924
192924
202924
212924
223024
233024
243024
253024
263024
273024
283024
293024
303025

How September really feels in Labuan

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.

Labuan weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 25°35228.512.33.2
Feb28° / 25°29824.712.23.3
Mar29° / 25°29428.1123.1
Apr29° / 25°25826.511.93.1
May30° / 26°15721.311.73.8
Jun29° / 25°10615.911.64.5
Jul29° / 24°7311.411.75.4
Aug29° / 24°437.811.85.8
Sep29° / 24°548.6125.3
Oct30° / 25°12915.312.14.3
Nov29° / 25°25623.912.33.4
Dec28° / 25°4202812.43.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 24% of September, with mostly cloudy or overcast conditions the remaining 55%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14852
24852
34852
44852
54951
64951
74951
84852
94852
104753
114753
124753
134654
144555
154456
164456
174456
184456
194456
204456
214456
224357
234357
244357
254357
264357
274258
284258
294060
304060

Chance of precipitation in September

Any precipitation

Labuan gets around 54 mm of rain over 8.6 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 29% and peaks near 31% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
128
229
329
429
529
629
729
829
929
1029
1128
1228
1328
1428
1528
1628
1728
1828
1928
2028
2128
2228
2328
2429
2529
2629
2730
2830
2930
3031

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 84% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
111827
211827
310837
410846
510846
611836
711836
810846
910846
1010846
1110846
1210846
1310846
149856
159847
169847
178857
188857
198848
208848
217849
227849
2378310
2478310
2578310
2668311
2768311
2868311
2968311
3068311

Wind in September

Winds average 13 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
112calm
212calm
312calm
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze

Sunrise & sunset in September

DaylightNight

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

Days grow by about 6 minutes over September. Sunrise moves from 6:00 AM to 5:45 AM, and sunset from 5:53 PM to 5:47 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:005:53
211.96:005:53
311.95:595:52
411.95:595:52
511.95:585:52
611.95:575:52
711.95:575:52
811.95:565:51
911.95:565:51
1011.95:555:51
1111.95:555:51
1211.95:545:51
1311.95:545:51
1412.05:535:50
1512.05:535:50
1612.05:525:50
1712.05:515:50
1812.05:515:50
1912.05:505:49
2012.05:505:49
2112.05:495:49
2212.05:495:49
2312.05:485:49
2412.05:485:48
2512.05:475:48
2612.05:475:48
2712.05:465:48
2812.05:465:48
2912.05:455:48
3012.05:455:47

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.07 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.54 kWh/m² to a high of 6.07 kWh/m² in September across the year — September's 6.07 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
35.9Bright
45.9Bright
56.0Bright
66.0Bright
76.0Bright
86.0Intense
96.0Intense
106.0Intense
116.0Intense
126.1Intense
136.1Intense
146.1Intense
156.1Intense
166.1Intense
176.1Intense
186.1Intense
196.1Intense
206.1Intense
216.1Intense
226.1Intense
236.1Intense
246.1Intense
256.1Intense
266.1Intense
276.1Intense
286.1Intense
296.1Intense
306.1Intense
Planning a trip in September

Hazard calendar for Labuan

In seasonPeak

None of Labuan's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

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

Labuan's rainy season runs November–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 September a good time to visit Labuan?

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

5.3
Sightseeing
3rd-best month of the year
7.0
Beach & pool
2nd-best month of the year

September is a reasonable time to visit Labuan for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Labuan in September

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

In September, Labuan sees daytime highs around 29°C and nights near 24°C. Pack light clothes and sun protection. Worth having: rain gear. About 9 days see rain.

light clothessun protectionrain gear

Sea temperature near Labuan 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 offshore 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
Apr29Tropical
May30Tropical
Jun30Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec29Tropical

UV index in Labuan in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Labuan peaks around March 12 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 15 at about 7 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highVery highVery highExtremeMar 12UV 15Nov 15UV 7
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar16Extreme
Apr11Extreme
May9Very high
Jun8Very high
Jul9Very high
Aug10Extreme
Sep9Very high
Oct11Extreme
Nov6High
Dec12Extreme

Air quality in Labuan 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 Labuan is worst in May — around 35 µg/m³ PM2.5 (poor), about 2.5× the cleanest month (December, 14 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateMay 2335 µg/m³Dec 2215 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb18Moderate
Mar19Moderate
Apr24Moderate
May35Poor
Jun34Moderate
Jul35Moderate
Aug32Moderate
Sep30Moderate
Oct26Moderate
Nov21Moderate
Dec14Moderate
Location & terrain

Where is Labuan?

Labuan sits at 6.4°S, 105.8°E, 12 m above sea level, in Indonesia. The nearest listed city is Pandeglang, 32 km away.

Topography around Labuan

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

Within 3 km, the terrain around Labuan has only modest variations in elevation — a maximum elevation change of 54 m around an average of 11 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,115 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,908 m.

The land around Labuan is covered by trees (42%) and water (34%) within 3 km, water (46%) and trees (36%) within 16 km, and water (55%) and trees (36%) within 80 km.

3 km
54 m
16 km
1,115 m
80 km
1,908 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Pandeglang 32 km · Serang 46 km · Rangkasbitung 46 km · Cilegon 47 km · Kresek 67 km · Cikupa 77 km · Pasarkemis 81 km · Curug 81 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 Labuan (-6.3784°, 105.83°, elevation 12 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).