Singkawang weather in September

In September, Singkawang sees average daytime highs of 29°C and overnight lows near 25°C, with 203 mm of rain across 21.8 wet days and about 12 hours of daylight. It is the 6th-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 3% 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 Singkawang's 7th-clearest and 6th-windiest month. For the whole year in context, see Singkawang's year-round climate.

Daytime high
29°
6th warmest
Overnight low
25°
7th coldest
Rainfall
203 mm
21.8 wet days
Daylight
12 hours
5:38 AM – 5:39 PM
Cloud cover
85%
7th clearest
Wind
8 km/h
6th windiest
Solar energy
5.11 kWh/m²
Travel score
3.5
out of 10

Singkawang is city in West Kalimantan Province, Indonesia.

Density
504/km²
people per km²
Founded
1771

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 Singkawang reaches about 29°C in the afternoon and slips back to 25°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 31°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)
12925
22925
32925
42925
52925
62925
72925
82925
92925
102925
112925
122925
132925
142925
152925
162925
172925
182925
192925
202925
212925
222925
232925
242925
252925
262925
272925
282925
292925
302925

How September really feels in Singkawang

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.

Singkawang weather by month

How September compares with the rest of the year at a glance. September is the 6th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 24°28325.5123.5
Feb29° / 24°17719.7123.8
Mar29° / 25°18722.1123.6
Apr30° / 25°21225123.2
May30° / 25°22124.7123.2
Jun30° / 25°19420.612.13.6
Jul30° / 25°17819.1123.9
Aug30° / 25°16319.1123.8
Sep29° / 25°20321.8123.5
Oct29° / 25°30327123.2
Nov29° / 25°39528.9122.9
Dec28° / 24°39928.211.93.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 3% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 7% of September, with mostly cloudy or overcast conditions the remaining 89%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11486
21486
31486
41486
51387
61387
71387
81387
91288
101288
111288
121288
131189
141189
151189
161090
171090
181090
191090
201090
211090
22991
23892
24892
25892
26892
27892
28892
29694
30694

Chance of precipitation in September

Any precipitation

Singkawang gets around 203 mm of rain over 21.8 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 73% and peaks near 79% on the wettest days.

0%20%40%60%80%151015202530
Rain chance (%)
174
274
374
473
573
673
772
872
971
1071
1170
1270
1370
1470
1570
1670
1770
1870
1971
2072
2172
2273
2374
2475
2575
2676
2777
2878
2978
3079

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 58% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
15941
26040
36139
46238
56238
66337
76337
86337
96337
106238
116139
126139
136040
145941
155842
165743
175644
185644
195545
205446
215446
225347
235347
245347
255347
265347
275347
285347
295347
305347

Wind in September

Winds average 8 km/h in September.

Across September, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

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 5:43 AM to 5:34 AM, and sunset from 5:44 PM to 5:33 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.05:435:44
212.05:435:44
312.05:435:44
412.05:425:43
512.05:425:43
612.05:425:42
712.05:415:42
812.05:415:42
912.05:415:41
1012.05:405:41
1112.05:405:41
1212.05:405:40
1312.05:395:40
1412.05:395:39
1512.05:395:39
1612.05:385:39
1712.05:385:38
1812.05:385:38
1912.05:375:37
2012.05:375:37
2112.05:375:37
2212.05:365:36
2312.05:365:36
2412.05:365:35
2512.05:355:35
2612.05:355:35
2712.05:355:34
2812.05:345:34
2912.05:345:34
3012.05:345:33

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.11 kWh/m².

For context, solar energy here swings from a low near 4.14 kWh/m² to a high of 5.28 kWh/m² in March across the year — September's 5.11 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.1Bright
45.1Bright
55.1Bright
65.1Bright
75.1Bright
85.1Bright
95.1Bright
105.1Bright
115.1Bright
125.1Bright
135.1Bright
145.2Bright
155.2Bright
165.2Bright
175.2Bright
185.2Bright
195.2Bright
205.2Bright
215.1Bright
225.1Bright
235.1Bright
245.1Bright
255.1Bright
265.1Bright
275.0Bright
285.0Bright
295.0Bright
305.0Bright
Planning a trip in September

Is September a good time to visit Singkawang?

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

3.5
Sightseeing
6th-best month of the year
4.7
Beach & pool
6th-best month of the year

September is a weaker month for outdoor sightseeing in Singkawang.

What to pack for Singkawang in September

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

In September, Singkawang sees daytime highs around 29°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 22 days see rain.

light clothesrain gearsun protection

Sea temperature near Singkawang 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 13 km away) is warmest in May 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
Sep29Tropical
Oct29Tropical
Nov30Tropical
Dec29Tropical

UV index in Singkawang 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 Singkawang peaks around February 18 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 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 16Jul 12UV 11
UV index (midday)Level
Jan14Extreme
Feb16Extreme
Mar15Extreme
Apr14Extreme
May13Extreme
Jun11Extreme
Jul11Extreme
Aug13Extreme
Sep13Extreme
Oct14Extreme
Nov12Extreme
Dec11Extreme

Air quality in Singkawang 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 Singkawang is worst in September — around 42 µg/m³ PM2.5 (poor), about 4.2× the cleanest month (January, 10 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodModeratePoorModerateGoodSep 1440 µg/m³Jan 1110 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb11Good
Mar13Moderate
Apr14Moderate
May13Moderate
Jun13Moderate
Jul15Moderate
Aug31Moderate
Sep42Poor
Oct23Moderate
Nov12Moderate
Dec10Good
Location & terrain

Where is Singkawang?

Singkawang sits at 0.9°N, 109.0°E, 2 m above sea level, in Indonesia. The nearest listed city is Sungai Raya, 25 km away.

Topography around Singkawang

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

Within 3 km, the terrain around Singkawang has significant variations in elevation — a maximum elevation change of 301 m around an average of 9 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 928 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,381 m.

The land around Singkawang is covered by trees (37%) and artificial surfaces (36%) within 3 km, trees (55%) and water (30%) within 16 km, and trees (58%) and water (37%) within 80 km.

3 km
301 m
16 km
928 m
80 km
1,381 m
treesshrubsgrasslandcroplandartificial surfaceswatermangroves
September weather nearby: Sungai Raya 25 km · Pemangkat 29 km · Bengkayang 51 km · Kota Sambas 61 km · Pontianak 111 km · Lundu 129 km · Bau 141 km · Tebedu 154 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 Singkawang (0.9093°, 108.9846°, elevation 2 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).