Sukabumi weather in September

In September, Sukabumi sees average daytime highs of 28°C and overnight lows near 20°C, with 113 mm of rain across 15.4 wet days and about 12 hours of daylight. It is the 1st-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 8% of the time in September, and the air most often feels muggy.

Daylight stretches from about 11 h 54 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Sukabumi's 4th-clearest and 3rd-windiest month. For the whole year in context, see Sukabumi's year-round climate.

Daytime high
28°
1st warmest
Overnight low
20°
3rd coldest
Rainfall
113 mm
15.4 wet days
Daylight
12 hours
5:48 AM – 5:45 PM
Cloud cover
70%
4th clearest
Wind
4 km/h
3rd windiest
Solar energy
5.8 kWh/m²
Travel score
4.9
out of 10

Sukabumi is city in West Java Province, Indonesia.

Density
7,553/km²
people per km²
Founded
1914

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 28°C through the month.

A typical September day in Sukabumi reaches about 28°C in the afternoon and slips back to 20°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 30°C. Set against its neighbours, September runs on par with August and on par with October.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12820
22820
32820
42820
52820
62820
72820
82820
92820
102820
112820
122820
132820
142820
152820
162820
172820
182820
192820
202820
212820
222820
232820
242820
252820
262820
272820
282820
292820
302820

Sukabumi weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 21°36229.412.43.4
Feb27° / 21°32726.412.23.4
Mar28° / 21°36529.6123.3
Apr28° / 21°30227.811.93.2
May28° / 21°18724.411.73.8
Jun28° / 20°11118.811.64.6
Jul28° / 20°9315.411.65.4
Aug28° / 20°7611.611.85.6
Sep28° / 20°11315.4124.9
Oct28° / 21°26523.312.24.0
Nov28° / 21°39427.812.33.5
Dec27° / 21°40629.112.43.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 8% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 24% of September, with mostly cloudy or overcast conditions the remaining 68%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13763
23862
33862
43862
53664
63664
73763
83763
93565
103565
113565
123466
133466
143268
153268
163268
173169
183070
193070
203070
212971
222872
232872
242872
252872
262872
272872
282773
292773
302674

Chance of precipitation in September

Any precipitation

Sukabumi gets around 113 mm of rain over 15.4 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 51% and peaks near 60% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
146
246
347
447
547
647
748
848
948
1048
1148
1248
1349
1449
1549
1650
1750
1851
1951
2052
2153
2254
2355
2456
2556
2657
2758
2859
2959
3060

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the muggy band about 69% of days. Sticky, muggy-or-worse air turns up on roughly 80% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1120709
2120709
3120709
4120709
5121699
6121708
7121708
8121708
9122698
10122698
11122698
12121708
13121708
14121708
15121699
16020719
170207010
180207010
190197011
200196912
210187012
220186913
230176914
240176914
250166915
260166816
270156916
280156817
290156817
300146818

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 11 h 54 min at the start of September to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over September. Sunrise moves from 5:56 AM to 5:40 AM, and sunset from 5:48 PM to 5:43 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.95:565:48
211.95:555:48
311.95:555:48
411.95:545:48
511.95:545:47
611.95:535:47
711.95:535:47
811.95:525:47
911.95:525:47
1011.95:515:47
1111.95:515:46
1211.95:505:46
1311.95:495:46
1411.95:495:46
1512.05:485:46
1612.05:485:45
1712.05:475:45
1812.05:475:45
1912.05:465:45
2012.05:455:45
2112.05:455:45
2212.05:445:44
2312.05:445:44
2412.05:435:44
2512.05:435:44
2612.05:425:44
2712.05:425:44
2812.05:415:43
2912.05:415:43
3012.15:405:43

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.8 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.42 kWh/m² to a high of 5.8 kWh/m² in September across the year — September's 5.8 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.7Bright
45.7Bright
55.7Bright
65.7Bright
75.8Bright
85.8Bright
95.8Bright
105.8Bright
115.8Bright
125.8Bright
135.8Bright
145.8Bright
155.8Bright
165.8Bright
175.8Bright
185.8Bright
195.8Bright
205.8Bright
215.8Bright
225.8Bright
235.8Bright
245.8Bright
255.8Bright
265.8Bright
275.8Bright
285.8Bright
295.8Bright
305.7Bright
Planning a trip in September

Hazard calendar for Sukabumi

In seasonPeak

None of Sukabumi's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Sukabumi sits in the South Indian Ocean cyclone belt; the season peaks January–March.

Cyclone
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Sukabumi?

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

4.9
Sightseeing
3rd-best month of the year
5.8
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Sukabumi for sightseeing.

What to pack for Sukabumi in September

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

In September, Sukabumi sees daytime highs around 28°C and nights near 20°C. Pack light clothes and rain gear. Worth having: sun protection. About 15 days see rain.

light clothesrain gearsun protection

Sea temperature near Sukabumi in September

The nearest coast averages about 26°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 61 km away) is warmest in April at about 29°C and coldest in September near 26°C.

The water stays above 20°C all year — warm enough for a swim any month.

24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb29Tropical
Mar29Tropical
Apr29Tropical
May29Tropical
Jun28Tropical
Jul27Warm
Aug26Warm
Sep26Warm
Oct27Warm
Nov28Tropical
Dec29Tropical

UV index in Sukabumi in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Sukabumi peaks around March 14 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 15 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeVery highExtremeMar 14UV 16Nov 15UV 8
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar16Extreme
Apr12Extreme
May10Very high
Jun8Very high
Jul10Very high
Aug11Extreme
Sep12Extreme
Oct11Extreme
Nov7High
Dec12Extreme

Air quality in Sukabumi 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 Sukabumi is worst in May — around 121 µg/m³ PM2.5 (unhealthy), and holds fairly steady the rest of the year.

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

0306090120150JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyMay 21120 µg/m³Jan 1177 µg/m³
PM2.5 (µg/m³)Level
Jan77Unhealthy
Feb81Unhealthy
Mar95Unhealthy
Apr106Unhealthy
May121Unhealthy
Jun117Unhealthy
Jul108Unhealthy
Aug92Unhealthy
Sep84Unhealthy
Oct84Unhealthy
Nov87Unhealthy
Dec77Unhealthy
Location & terrain

Where is Sukabumi?

Sukabumi sits at 6.9°S, 106.9°E, 613 m above sea level, in Indonesia. The nearest listed city is Cicurug, 22 km away.

Topography around Sukabumi

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

Within 3 km, the terrain around Sukabumi has significant variations in elevation — a maximum elevation change of 271 m around an average of 611 m above sea level; within 16 km, extreme variations in elevation — a maximum elevation change of 2,704 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,993 m.

The land around Sukabumi is covered by artificial surfaces (50%) and trees (33%) within 3 km, trees (78%) within 16 km, and trees (67%) within 80 km.

3 km
271 m
16 km
2,704 m
80 km
2,993 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Cicurug 22 km · Cianjur 26 km · Caringin 26 km · Ciranjang-hilir 38 km · Bogor 39 km · Pelabuhanratu 42 km · Ciampea 47 km · Citeureup 48 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 Sukabumi (-6.9181°, 106.9267°, elevation 613 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). 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).