Lundu weather in September

In September, Lundu sees average daytime highs of 30°C and overnight lows near 24°C, with 246 mm of rain across 25.4 wet days and about 12 hours of daylight. It is the 5th-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 2% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 hours at the start of September to 12 hours by month's end. Set against the rest of the year, September is Lundu's 6th-clearest and 8th-windiest month. For the whole year in context, see Lundu's year-round climate.

Daytime high
30°
5th warmest
Overnight low
24°
8th coldest
Rainfall
246 mm
25.4 wet days
Daylight
12 hours
6:35 AM – 6:35 PM
Cloud cover
85%
6th clearest
Wind
4 km/h
8th windiest
Solar energy
4.95 kWh/m²
Travel score
2.9
out of 10

Lundu is town in Sarawak, Malaysia.

Density
13/km²
people per km²

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 30°C through the month.

A typical September day in Lundu reaches about 30°C in the afternoon and slips back to 24°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 32°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)
13024
23024
33024
43024
53024
63024
73024
83024
93024
103024
113024
123024
133024
143024
153024
163024
173024
183024
193024
203024
213024
223024
233024
243024
253024
263024
273024
283024
293024
303024

How September really feels in Lundu

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.

Lundu weather by month

How September compares with the rest of the year at a glance. September is the 5th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 24°38628.811.93.2
Feb28° / 24°26524.111.93.4
Mar29° / 24°24127.7123.0
Apr30° / 24°24727.7122.7
May31° / 25°24627.212.12.8
Jun31° / 24°19823.112.13.1
Jul31° / 24°19122.312.13.3
Aug31° / 24°20022.812.13.2
Sep30° / 24°24625.4122.9
Oct30° / 24°31629.1122.8
Nov29° / 24°35629.411.92.7
Dec29° / 24°41629.211.92.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 2% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 8% of September, with mostly cloudy or overcast conditions the remaining 90%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11288
21288
31288
41288
51189
61189
71189
81189
91189
101189
111189
121189
131090
141090
151090
161090
171090
181090
191090
201090
21991
22991
23991
24991
25991
26991
27892
28892
29892
30892

Chance of precipitation in September

Any precipitation

Lundu gets around 246 mm of rain over 25.4 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 85% and peaks near 89% on the wettest days.

0%20%40%60%80%100%151015202530
Rain chance (%)
184
284
384
484
584
684
784
884
984
1084
1184
1284
1384
1484
1584
1684
1784
1884
1985
2085
2185
2285
2386
2486
2587
2687
2787
2888
2988
3089

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 54% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
16040
25941
35941
45941
55842
65842
75842
85743
95743
105644
115644
125545
135545
145446
155347
165248
175248
185149
195149
205149
215149
225149
235149
245149
255149
265149
275149
285149
295149
305149

Wind in September

Winds average 4 km/h in September.

Across September, daily wind ranges from about 4 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 hours 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 0 minutes over September. Sunrise moves from 6:39 AM to 6:30 AM, and sunset from 6:41 PM to 6:30 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:396:41
212.06:396:41
312.06:396:41
412.06:386:40
512.06:386:40
612.06:386:39
712.06:386:39
812.06:376:39
912.06:376:38
1012.06:376:38
1112.06:366:37
1212.06:366:37
1312.06:366:36
1412.06:356:36
1512.06:356:36
1612.06:356:35
1712.06:346:35
1812.06:346:34
1912.06:346:34
2012.06:336:34
2112.06:336:33
2212.06:336:33
2312.06:326:32
2412.06:326:32
2512.06:326:31
2612.06:316:31
2712.06:316:31
2812.06:316:30
2912.06:316:30
3012.06:306:30

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.95 kWh/m².

For context, solar energy here swings from a low near 3.79 kWh/m² to a high of 5.11 kWh/m² in August across the year — September's 4.95 kWh/m² sits near the top of that range.

024151015202530
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
34.9Bright
44.9Bright
54.9Bright
64.9Bright
75.0Bright
85.0Bright
95.0Bright
105.0Bright
115.0Bright
125.0Bright
135.0Bright
145.0Bright
155.0Bright
165.0Bright
175.0Bright
185.0Bright
195.0Bright
205.0Bright
215.0Bright
224.9Bright
234.9Bright
244.9Bright
254.9Bright
264.9Bright
274.9Bright
284.8Bright
294.8Bright
304.8Bright
Planning a trip in September

Is September a good time to visit Lundu?

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

2.9
Sightseeing
7th-best month of the year
4.1
Beach & pool
4th-best month of the year

September is a weaker month for outdoor sightseeing in Lundu.

What to pack for Lundu in September

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

In September, Lundu sees daytime highs around 30°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 25 days see rain.

light clothesrain gearsun protection

Sea temperature near Lundu in September

The nearest coast averages about 30°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 22 km away) is warmest in June at about 30°C and coldest in February 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
Aug30Tropical
Sep30Tropical
Oct30Tropical
Nov29Tropical
Dec29Tropical

UV index in Lundu in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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 Lundu peaks around February 18 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 13 at about 11 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeFeb 18UV 15Jul 13UV 11
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar15Extreme
Apr15Extreme
May13Extreme
Jun11Extreme
Jul11Extreme
Aug12Extreme
Sep13Extreme
Oct14Extreme
Nov12Extreme
Dec11Extreme

Air quality in Lundu 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 Lundu is worst in September — around 39 µg/m³ PM2.5 (poor), about 4.1× the cleanest month (January, 9 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodModeratePoorModerateGoodSep 938 µg/m³Jan 129 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb11Good
Mar12Moderate
Apr13Moderate
May15Moderate
Jun13Moderate
Jul18Moderate
Aug38Poor
Sep39Poor
Oct21Moderate
Nov11Good
Dec10Good
Location & terrain

Where is Lundu?

Lundu sits at 1.7°N, 109.9°E, 9 m above sea level, in Malaysia. The nearest listed city is Bau, 44 km away.

Topography around Lundu

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

Within 3 km, the terrain around Lundu has large variations in elevation — a maximum elevation change of 673 m around an average of 70 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 894 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,649 m.

The land around Lundu is covered by trees (77%) within 3 km, trees (67%) and water (21%) within 16 km, and trees (58%) and water (37%) within 80 km.

3 km
673 m
16 km
894 m
80 km
1,649 m
treesgrasslandcroplandartificial surfacesbare terrainwatermangroves
September weather nearby: Bau 44 km · Kuching 55 km · Siburan 70 km · Kota Sambas 70 km · Tebedu 92 km · Serian 97 km · Bengkayang 104 km · Simunjan 105 km

Malaysia travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / G / M
230 V · 50 Hz
Prices
≈ 32% of US
price level, 2025
GDP per capita
$13,125
2025
Happiness
6.0 / 10
World Happiness, 2025
Safe drinking water
95%
of population, 2024
Homicide rate
0.7
per 100k, 2023
Road deaths
22.5
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
High
EF EPI 581
Religion
Muslim 64%Buddhist 19%Christian 9%Hindu 6%

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 Lundu (1.6744°, 109.8517°, 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).