Kualakapuas weather in September

In September, Kualakapuas sees average daytime highs of 33°C and overnight lows near 24°C, with 68 mm of rain across 10.8 wet days and about 12 hours of daylight. It is the 1st-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 33°C through the month. The sky is clear or mostly clear about 14% 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 Kualakapuas's 3rd-clearest and 2nd-windiest month. For the whole year in context, see Kualakapuas's year-round climate.

Daytime high
33°
1st warmest
Overnight low
24°
3rd coldest
Rainfall
68 mm
10.8 wet days
Daylight
12 hours
5:17 AM – 5:16 PM
Cloud cover
71%
3rd clearest
Wind
8 km/h
2nd windiest
Solar energy
5.5 kWh/m²
Travel score
3.3
out of 10

Kualakapuas is capital of Kapuas Regency, Central Kalimantan, 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 33°C through the month.

A typical September day in Kualakapuas reaches about 33°C in the afternoon and slips back to 24°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 31°C and 35°C. Set against its neighbours, September runs about 1°C warmer than August and on par with October.

20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13324
23324
33324
43324
53324
63324
73324
83324
93324
103324
113324
123324
133324
143324
153324
163324
173324
183324
193324
203324
213324
223324
233324
243324
253324
263324
273324
283324
293324
303324

How September really feels in Kualakapuas

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.

Kualakapuas weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 24°24328.112.22.5
Feb31° / 24°21024.912.12.5
Mar31° / 24°24827.8122.4
Apr32° / 25°21927.311.92.4
May32° / 25°1392211.92.9
Jun31° / 24°10917.611.83.4
Jul31° / 24°8214.211.83.8
Aug32° / 23°559.911.93.8
Sep33° / 24°6810.8123.3
Oct33° / 24°16018.312.12.8
Nov32° / 24°24027.712.12.3
Dec31° / 24°26529.112.22.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 14% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 68%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13664
23664
33565
43565
53466
63367
73367
83367
93268
103268
113268
123268
133367
143268
153268
163268
173268
183367
193367
203367
213367
223367
233367
243367
253268
263268
273070
282971
292971
302872

Chance of precipitation in September

Any precipitation

Kualakapuas gets around 68 mm of rain over 10.8 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 37% and peaks near 43% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
137
237
338
438
538
638
738
838
937
1037
1137
1236
1336
1436
1535
1635
1735
1834
1934
2034
2134
2235
2335
2436
2536
2637
2738
2840
2941
3043

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 63% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
1226414
2236314
3236314
4236314
5236314
6246313
7246313
8246313
9246313
10246313
11246313
12236413
13236314
14226414
15216415
16216316
17206416
18196417
19186418
20186319
21176419
22166420
23156421
24156322
25146422
26146323
27146224
28136225
29136126
30136126

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
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

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 5:24 AM to 5:11 AM, and sunset from 5:20 PM to 5:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.95:245:20
211.95:235:20
311.95:235:20
412.05:235:20
512.05:225:19
612.05:225:19
712.05:215:19
812.05:215:19
912.05:205:18
1012.05:205:18
1112.05:205:18
1212.05:195:17
1312.05:195:17
1412.05:185:17
1512.05:185:17
1612.05:175:16
1712.05:175:16
1812.05:165:16
1912.05:165:15
2012.05:155:15
2112.05:155:15
2212.05:155:15
2312.05:145:14
2412.05:145:14
2512.05:135:14
2612.05:135:13
2712.05:125:13
2812.05:125:13
2912.05:115:13
3012.05:115:12

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.5 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.12 kWh/m² to a high of 5.5 kWh/m² in September across the year — September's 5.5 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.3Bright
25.4Bright
35.4Bright
45.4Bright
55.4Bright
65.4Bright
75.4Bright
85.4Bright
95.4Bright
105.5Bright
115.5Bright
125.5Bright
135.5Bright
145.5Bright
155.5Bright
165.5Bright
175.5Bright
185.5Bright
195.5Bright
205.5Bright
215.5Bright
225.5Bright
235.5Bright
245.5Bright
255.5Bright
265.5Bright
275.5Bright
285.5Bright
295.5Bright
305.5Bright
Planning a trip in September

Is September a good time to visit Kualakapuas?

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

3.3
Sightseeing
4th-best month of the year
5.8
Beach & pool
3rd-best month of the year

September is a weaker month for outdoor sightseeing in Kualakapuas.

What to pack for Kualakapuas in September

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

In September, Kualakapuas sees daytime highs around 33°C and nights near 24°C. Pack light clothes. Worth having: rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

Sea temperature near Kualakapuas in September

The nearest coast averages about 28°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 50 km away) is warmest in April at about 30°C and coldest in August 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
Jan29Tropical
Feb29Tropical
Mar30Tropical
Apr30Tropical
May30Tropical
Jun29Tropical
Jul29Tropical
Aug28Tropical
Sep28Tropical
Oct29Tropical
Nov30Tropical
Dec29Tropical

UV index in Kualakapuas 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 Kualakapuas peaks around February 17 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeFeb 17UV 15Jun 23UV 10
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar14Extreme
Apr14Extreme
May12Extreme
Jun10Extreme
Jul10Extreme
Aug12Extreme
Sep13Extreme
Oct12Extreme
Nov13Extreme
Dec13Extreme

Air quality in Kualakapuas 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 Kualakapuas is worst in September — around 89 µg/m³ PM2.5 (unhealthy), about 4.4× the cleanest month (January, 20 µg/m³).

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

0306090JanFebMarAprMayJunJulAugSepOctNovDecModerateUnhealthyModerateSep 2287 µg/m³Jan 1520 µg/m³
PM2.5 (µg/m³)Level
Jan20Moderate
Feb23Moderate
Mar26Moderate
Apr27Moderate
May28Moderate
Jun28Moderate
Jul28Moderate
Aug39Poor
Sep89Unhealthy
Oct82Unhealthy
Nov44Poor
Dec22Moderate
Location & terrain

Where is Kualakapuas?

Kualakapuas sits at 3.0°S, 114.4°E, 9 m above sea level, in Indonesia. The nearest listed city is Banjarmasin, 41 km away.

Topography around Kualakapuas

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

Within 3 km, the terrain around Kualakapuas has only modest variations in elevation — a maximum elevation change of 15 m around an average of 2 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 19 m; within 80 km, only modest variations in elevation — a maximum elevation change of 186 m.

The land around Kualakapuas is covered by trees (33%) and water (21%) within 3 km, trees (58%) and grassland (20%) within 16 km, and trees (49%) within 80 km.

3 km
15 m
16 km
19 m
80 km
186 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Banjarmasin 41 km · Banjarbaru 69 km · Martapura 69 km · Palangkaraya 103 km · Amuntai 116 km · Barabai 120 km · Tanjung 147 km · Sampit 168 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 Kualakapuas (-3.0091°, 114.3876°, 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).