Pelabuhanratu weather in September

In September, Pelabuhanratu sees average daytime highs of 28°C and overnight lows near 22°C, with 123 mm of rain across 12.4 wet days and about 12 hours of daylight. It is the 4th-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 14% 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 Pelabuhanratu's 4th-clearest and 1st-windiest month. For the whole year in context, see Pelabuhanratu's year-round climate.

Daytime high
28°
4th warmest
Overnight low
22°
2nd coldest
Rainfall
123 mm
12.4 wet days
Daylight
12 hours
5:49 AM – 5:47 PM
Cloud cover
67%
4th clearest
Wind
10 km/h
1st windiest
Solar energy
5.82 kWh/m²
Travel score
5.8
out of 10

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 Pelabuhanratu reaches about 28°C in the afternoon and slips back to 22°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 29°C. Set against its neighbours, September runs on par with August and on par with October.

20°23°25°28°30°151015202530
Avg high (°C)Avg low (°C)
12822
22822
32822
42822
52822
62822
72822
82822
92822
102822
112822
122822
132822
142822
152822
162822
172822
182822
192822
202822
212822
222822
232822
242822
252822
262822
272822
282822
292822
302822

Pelabuhanratu weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 22°38929.312.43.4
Feb27° / 22°34826.512.23.4
Mar28° / 23°36229.2123.4
Apr28° / 23°29726.611.93.5
May28° / 23°19721.811.74.2
Jun28° / 22°11715.711.65.1
Jul28° / 22°10212.211.66.0
Aug28° / 21°739.611.86.4
Sep28° / 22°12312.4125.8
Oct28° / 22°25720.812.24.6
Nov28° / 23°41826.312.33.7
Dec27° / 23°45028.912.43.5

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 24% of September, with mostly cloudy or overcast conditions the remaining 62%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14258
24357
34357
44357
54357
64357
74357
84258
94258
104258
114060
123961
133961
143961
153862
163862
173763
183664
193664
203664
213565
223565
233565
243565
253664
263565
273565
283466
293367
303268

Chance of precipitation in September

Any precipitation

Pelabuhanratu gets around 123 mm of rain over 12.4 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 42% and peaks near 53% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
136
236
337
437
537
637
737
837
937
1037
1137
1238
1338
1439
1539
1640
1741
1841
1942
2043
2144
2245
2346
2447
2548
2650
2751
2852
2952
3053

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 56% of days. Sticky, muggy-or-worse air turns up on roughly 94% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)
185933
285834
385834
485834
585735
675835
775835
875835
975835
1075835
1175835
1275835
1365935
1465935
1565836
1665836
1765737
1865737
1955738
2055639
2155540
2255441
2345442
2445343
2545244
2645145
2735146
2835047
2934949
3024850

Wind in September

Winds average 10 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
309calm

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 5:58 AM to 5:41 AM, and sunset from 5:49 PM to 5:45 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.95:585:49
211.95:575:49
311.95:565:49
411.95:565:49
511.95:555:49
611.95:555:49
711.95:545:49
811.95:545:48
911.95:535:48
1011.95:535:48
1111.95:525:48
1211.95:525:48
1311.95:515:48
1411.95:505:47
1512.05:505:47
1612.05:495:47
1712.05:495:47
1812.05:485:47
1912.05:485:46
2012.05:475:46
2112.05:465:46
2212.05:465:46
2312.05:455:46
2412.05:455:46
2512.05:445:45
2612.05:445:45
2712.05:435:45
2812.05:435:45
2912.05:425:45
3012.15:415:45

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.82 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.41 kWh/m² to a high of 5.82 kWh/m² in September across the year — September's 5.82 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
65.8Bright
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
305.8Bright
Planning a trip in September

Hazard calendar for Pelabuhanratu

In seasonPeak

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

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

Pelabuhanratu's rainy season runs October–April, when most of the year's rain falls.

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

Is September a good time to visit Pelabuhanratu?

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

5.8
Sightseeing
3rd-best month of the year
6.2
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Pelabuhanratu for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Pelabuhanratu in September

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

In September, Pelabuhanratu sees daytime highs around 28°C and nights near 22°C. Pack light clothes. Worth having: rain gear and sun protection. About 12 days see rain.

light clothesrain gearsun protection

Sea temperature near Pelabuhanratu 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 25 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
Jun29Tropical
Jul28Warm
Aug27Warm
Sep26Warm
Oct27Warm
Nov28Tropical
Dec29Tropical

UV index in Pelabuhanratu 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 Pelabuhanratu peaks around March 11 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 15 at about 7 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeVery highExtremeMar 11UV 16Nov 15UV 7
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar16Extreme
Apr11Extreme
May9Very high
Jun8Very high
Jul9Very high
Aug11Extreme
Sep12Extreme
Oct11Extreme
Nov6High
Dec13Extreme

Air quality in Pelabuhanratu 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 Pelabuhanratu is worst in May — around 104 µg/m³ PM2.5 (unhealthy), about 1.9× the cleanest month (January, 54 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyMay 23104 µg/m³Jan 1054 µg/m³
PM2.5 (µg/m³)Level
Jan54Poor
Feb60Unhealthy
Mar69Unhealthy
Apr83Unhealthy
May104Unhealthy
Jun102Unhealthy
Jul100Unhealthy
Aug87Unhealthy
Sep77Unhealthy
Oct73Unhealthy
Nov69Unhealthy
Dec54Poor
Location & terrain

Where is Pelabuhanratu?

Pelabuhanratu sits at 7.0°S, 106.6°E, 21 m above sea level, in Indonesia. The nearest listed city is Cicurug, 34 km away.

Topography around Pelabuhanratu

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

Within 3 km, the terrain around Pelabuhanratu has large variations in elevation — a maximum elevation change of 606 m around an average of 111 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,623 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,993 m.

The land around Pelabuhanratu is covered by trees (60%) and water (22%) within 3 km, trees (68%) and water (24%) within 16 km, and trees (60%) and water (30%) within 80 km.

3 km
606 m
16 km
1,623 m
80 km
2,993 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Cicurug 34 km · Sukabumi 42 km · Caringin 43 km · Ciampea 51 km · Bogor 51 km · Cibinong 65 km · Parung 66 km · Citeureup 67 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 Pelabuhanratu (-6.9875°, 106.5514°, elevation 21 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).