Martapura weather in September

In September, Martapura sees average daytime highs of 33°C and overnight lows near 23°C, with 74 mm of rain across 9 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 16% 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 Martapura's 3rd-clearest and 2nd-windiest month. For the whole year in context, see Martapura's year-round climate.

Daytime high
33°
1st warmest
Overnight low
23°
3rd coldest
Rainfall
74 mm
9 wet days
Daylight
12 hours
6:15 AM – 6:14 PM
Cloud cover
68%
3rd clearest
Wind
8 km/h
2nd windiest
Solar energy
5.7 kWh/m²
Travel score
3.5
out of 10

Martapura is capital of Banjar Regency, South 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 33°C through the month.

A typical September day in Martapura reaches about 33°C in the afternoon and slips back to 23°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 35°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)
13323
23323
33323
43323
53323
63323
73323
83323
93323
103323
113323
123323
133323
143323
153323
163323
173323
183323
193323
203323
213323
223323
233323
243323
253323
263323
273323
283323
293323
303323

How September really feels in Martapura

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.

Martapura 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
Jan30° / 24°33728.912.22.6
Feb31° / 24°26725.112.12.6
Mar31° / 24°29427.4122.6
Apr31° / 24°28427.311.92.5
May32° / 24°18521.911.83.0
Jun31° / 24°13818.111.83.5
Jul31° / 23°10013.511.84.0
Aug32° / 23°628.911.93.9
Sep33° / 23°749123.5
Oct33° / 24°17216.912.12.9
Nov31° / 24°3042712.22.4
Dec30° / 24°39029.712.22.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 16% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 20% of September, with mostly cloudy or overcast conditions the remaining 64%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14258
24258
34060
44060
54060
64060
73961
83961
93763
103763
113763
123664
133664
143664
153664
163664
173664
183664
193664
203664
213664
223565
233466
243466
253367
263367
273268
283169
293070
302872

Chance of precipitation in September

Any precipitation

Martapura gets around 74 mm of rain over 9 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 31% and peaks near 38% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
129
229
329
428
528
628
728
828
928
1028
1128
1229
1329
1430
1530
1630
1731
1831
1932
2032
2132
2233
2333
2434
2534
2635
2735
2836
2937
3038

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 64% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
130628
230628
330637
430637
530637
631627
731627
831627
930637
1030628
1129638
1229638
1328639
1427649
15266410
16256510
17256411
18246511
19236512
20226612
21216613
22216613
23206614
24206614
25196615
26196516
27196516
28186517
29186418
30186418

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.

051015151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
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 6:22 AM to 6:09 AM, and sunset from 6:18 PM to 6:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:226:18
211.96:226:18
311.96:216:18
411.96:216:18
511.96:206:17
611.96:206:17
712.06:206:17
812.06:196:17
912.06:196:16
1012.06:186:16
1112.06:186:16
1212.06:176:15
1312.06:176:15
1412.06:166:15
1512.06:166:15
1612.06:156:14
1712.06:156:14
1812.06:146:14
1912.06:146:13
2012.06:146:13
2112.06:136:13
2212.06:136:13
2312.06:126:12
2412.06:126:12
2512.06:116:12
2612.06:116:12
2712.06:106:11
2812.06:106:11
2912.06:096:11
3012.06:096:11

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.7 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.14 kWh/m² to a high of 5.7 kWh/m² in September across the year — September's 5.7 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.6Bright
55.6Bright
65.6Bright
75.6Bright
85.6Bright
95.6Bright
105.7Bright
115.7Bright
125.7Bright
135.7Bright
145.7Bright
155.7Bright
165.7Bright
175.7Bright
185.8Bright
195.8Bright
205.8Bright
215.8Bright
225.8Bright
235.8Bright
245.7Bright
255.7Bright
265.7Bright
275.7Bright
285.7Bright
295.7Bright
305.7Bright
Planning a trip in September

Is September a good time to visit Martapura?

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

3.5
Sightseeing
3rd-best month of the year
6.1
Beach & pool
2nd-best month of the year

September is a weaker month for outdoor sightseeing in Martapura. The water and warmth also suit a beach or pool day.

What to pack for Martapura in September

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

In September, Martapura sees daytime highs around 33°C and nights near 23°C. Pack light clothes. Worth having: rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

Sea temperature near Martapura 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 36 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
Jul28Tropical
Aug28Tropical
Sep28Tropical
Oct29Tropical
Nov30Tropical
Dec29Tropical

UV index in Martapura 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 Martapura peaks around February 16 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 16UV 15Jun 23UV 10
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar14Extreme
Apr14Extreme
May12Extreme
Jun10Extreme
Jul10Extreme
Aug12Extreme
Sep13Extreme
Oct13Extreme
Nov13Extreme
Dec12Extreme

Air quality in Martapura 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 Martapura is worst in September — around 29 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (January, 12 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateSep 2329 µg/m³Jan 1412 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb13Moderate
Mar14Moderate
Apr13Moderate
May13Moderate
Jun14Moderate
Jul14Moderate
Aug17Moderate
Sep29Moderate
Oct29Moderate
Nov20Moderate
Dec13Moderate
Location & terrain

Where is Martapura?

Martapura sits at 3.4°S, 114.9°E, 6 m above sea level, in Indonesia. The nearest listed city is Banjarbaru, 5.0 km away.

Topography around Martapura

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

Within 3 km, the terrain around Martapura has only modest variations in elevation — a maximum elevation change of 35 m around an average of 8 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 458 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,369 m.

The land around Martapura is covered by artificial surfaces (29%), trees (25%) and cropland (21%) within 3 km, trees (50%) and grassland (21%) within 16 km, and trees (57%) within 80 km.

3 km
35 m
16 km
458 m
80 km
1,369 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Banjarbaru 5.0 km · Banjarmasin 32 km · Kualakapuas 69 km · Barabai 109 km · Amuntai 118 km · Tanjung 151 km · Palangkaraya 170 km · Sampit 234 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 Martapura (-3.4109°, 114.8642°, elevation 6 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).