Malinau weather in September

In September, Malinau sees average daytime highs of 31°C and overnight lows near 22°C, with 284 mm of rain across 28.2 wet days and about 12 hours of daylight. It is the 1st-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 6% 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 Malinau's 4th-clearest and 4th-windiest month. For the whole year in context, see Malinau's year-round climate.

Daytime high
31°
1st warmest
Overnight low
22°
3rd coldest
Rainfall
284 mm
28.2 wet days
Daylight
12 hours
6:07 AM – 6:08 PM
Cloud cover
79%
4th clearest
Wind
3 km/h
4th windiest
Solar energy
5.34 kWh/m²
Travel score
2.4
out of 10

Malinau is capital of Malinau Regency, North Kalimantan Province, 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 31°C through the month.

A typical September day in Malinau reaches about 31°C in the afternoon and slips back to 22°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 33°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)
13122
23122
33122
43122
53122
63122
73122
83122
93122
103122
113122
123122
133122
143122
153122
163122
173122
183122
193122
203122
213122
223122
233122
243122
253122
263122
273122
283122
293122
303122

How September really feels in Malinau

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.

Malinau weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 22°25027.411.82.8
Feb31° / 22°22024.711.92.7
Mar31° / 22°27528.9122.5
Apr31° / 23°28228.512.12.4
May31° / 23°31529.712.22.3
Jun31° / 22°26727.612.22.5
Jul31° / 22°26627.812.22.6
Aug31° / 22°27428.112.12.5
Sep31° / 22°28428.2122.4
Oct31° / 22°3042911.92.4
Nov31° / 22°28828.711.82.3
Dec31° / 22°30829.311.82.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 6% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 13% of September, with mostly cloudy or overcast conditions the remaining 81%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12377
22377
32377
42377
52377
62278
72179
82179
91981
101981
111981
121783
131783
141783
151783
161684
171684
181684
191684
201783
211882
221882
231882
241981
251981
261981
271981
281981
291783
301783

Chance of precipitation in September

Any precipitation

Malinau gets around 284 mm of rain over 28.2 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 94% and peaks near 95% on the wettest days.

0%20%40%60%80%100%151015202530
Rain chance (%)
195
295
394
494
594
694
794
894
994
1094
1195
1295
1395
1495
1595
1695
1794
1894
1994
2094
2194
2294
2394
2494
2594
2694
2793
2893
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 89% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
1919
2919
3919
4919
5919
6919
7919
8919
99010
109010
119010
128911
138911
148812
158812
168812
178812
188812
198713
208713
218713
228713
238713
248713
258713
268713
278812
288812
298812
308812

Wind in September

Winds average 3 km/h in September.

Across September, daily wind ranges from about 3 km/h on the calmest days to 3 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
13calm
23calm
33calm
43calm
53calm
63calm
73calm
83calm
93calm
103calm
113calm
123calm
133calm
143calm
153calm
163calm
173calm
183calm
193calm
203calm
213calm
223calm
233calm
243calm
253calm
263calm
273calm
283calm
293calm
303calm

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 6:11 AM to 6:04 AM, and sunset from 6:15 PM to 6:02 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.16:116:15
212.16:116:15
312.16:116:14
412.16:106:14
512.16:106:14
612.16:106:13
712.06:106:13
812.06:096:12
912.06:096:12
1012.06:096:11
1112.06:096:11
1212.06:086:10
1312.06:086:10
1412.06:086:09
1512.06:086:09
1612.06:076:08
1712.06:076:08
1812.06:076:07
1912.06:066:07
2012.06:066:07
2112.06:066:06
2212.06:066:06
2312.06:056:05
2412.06:056:05
2512.06:056:04
2612.06:056:04
2712.06:046:03
2812.06:046:03
2912.06:046:02
3012.06:046:02

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.34 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.45 kWh/m² to a high of 5.34 kWh/m² in September across the year — September's 5.34 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.3Bright
55.3Bright
65.3Bright
75.3Bright
85.3Bright
95.3Bright
105.3Bright
115.3Bright
125.3Bright
135.3Bright
145.3Bright
155.3Bright
165.3Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.3Bright
225.3Bright
235.3Bright
245.3Bright
255.3Bright
265.3Bright
275.3Bright
285.3Bright
295.2Bright
305.2Bright
Planning a trip in September

Hazard calendar for Malinau

In seasonPeak

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

Malinau 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 Malinau?

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

2.4
Sightseeing
8th-best month of the year
3.6
Beach & pool
9th-best month of the year

September is a weaker month for outdoor sightseeing in Malinau.

What to pack for Malinau in September

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

In September, Malinau sees daytime highs around 31°C and nights near 22°C. Pack light clothes and rain gear. Worth having: sun protection. About 28 days see rain.

light clothesrain gearsun protection

UV index in Malinau 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 Malinau peaks around February 22 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 14 at about 12 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeFeb 22UV 15Jul 14UV 12
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar15Extreme
Apr15Extreme
May14Extreme
Jun12Extreme
Jul11Extreme
Aug13Extreme
Sep13Extreme
Oct13Extreme
Nov12Extreme
Dec12Extreme
Location & terrain

Where is Malinau?

Malinau sits at 3.6°N, 116.6°E, 5 m above sea level, in Indonesia. The nearest listed city is Tarakan, 112 km away.

Topography around Malinau

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

Within 3 km, the terrain around Malinau has only modest variations in elevation — a maximum elevation change of 91 m around an average of 9 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 555 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,829 m.

The land around Malinau is covered by trees (64%) within 3 km, trees (95%) within 16 km, and trees (96%) within 80 km.

3 km
91 m
16 km
555 m
80 km
1,829 m
treesgrasslandcroplandartificial surfaceswatermangroves
September weather nearby: Tarakan 112 km · Tanjung Selor 117 km · Nunukan 129 km · Tawau 158 km · Bandar Nabawan 163 km · Lawas 195 km · Keningau 201 km · Sipitang 204 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 Malinau (3.5886°, 116.6239°, elevation 5 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). UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).