Serang weather in October

In October, Serang sees average daytime highs of 31°C and overnight lows near 26°C, with 119 mm of rain across 20.7 wet days and about 12.1 hours of daylight. It is the 1st-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 16% of the time in October, and the air most often feels miserable.

Daylight stretches from about 12 h 06 min at the start of October to 12 h 12 min by month's end. Set against the rest of the year, October is Serang's 6th-clearest and 7th-windiest month. For the whole year in context, see Serang's year-round climate.

Daytime high
31°
1st warmest
Overnight low
26°
10th coldest
Rainfall
119 mm
20.7 wet days
Daylight
12 h 06 min
5:36 AM – 5:45 PM
Cloud cover
71%
6th clearest
Wind
7 km/h
7th windiest
Solar energy
5.85 kWh/m²
Travel score
3.4
out of 10

Serang is city in Banten Province, Indonesia.

Density
2,755/km²
people per km²
Founded
2007

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 31°C through the month.

A typical October day in Serang reaches about 31°C in the afternoon and slips back to 26°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 32°C. Set against its neighbours, October runs on par with September and on par with November.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13125
23125
33125
43125
53125
63125
73126
83126
93126
103126
113126
123126
133126
143126
153126
163126
173126
183126
193126
203126
213126
223126
233126
243126
253126
263126
273126
283126
293126
303126
313126

How October really feels in Serang

Once humidity and wind are folded in, October averages 31 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
31
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in October is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Serang weather by month

How October compares with the rest of the year at a glance. October is the 1st-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 25°27728.312.32.9
Feb30° / 25°25526.312.22.8
Mar30° / 26°23627.5122.8
Apr31° / 26°19025.511.92.9
May31° / 26°13321.611.73.4
Jun30° / 25°10017.611.73.9
Jul30° / 25°731511.74.5
Aug30° / 25°5012.811.84.7
Sep31° / 25°6214.2124.2
Oct31° / 26°11920.712.13.4
Nov30° / 26°19225.812.32.9
Dec30° / 26°25626.312.33.0

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 16% of October, with mostly cloudy or overcast conditions the remaining 68%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14159
23961
34060
43961
53862
63862
73763
83763
93664
103664
113664
123664
133565
143565
153466
163367
173367
183169
193169
203169
212872
222872
232773
242674
252674
262476
272377
282377
292377
302278
312278

Chance of precipitation in October

Any precipitation

Serang gets around 119 mm of rain over 20.7 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 66% and peaks near 80% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
156
257
357
458
558
658
759
859
960
1060
1160
1261
1361
1462
1562
1663
1764
1866
1967
2068
2170
2271
2372
2474
2575
2676
2777
2878
2979
3079
3180

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, October lands in the miserable band about 54% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
16238
26139
36040
45941
55842
65743
75644
85545
95347
105248
115149
125050
134852
144753
154654
164456
174357
184258
194159
204060
213961
223862
233763
243763
253763
263664
273664
283664
293664
303565
313565

Wind in October

Winds average 7 km/h in October.

Across October, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in October

DaylightNight

Daylight runs from about 12 h 06 min at the start of October to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over October. Sunrise moves from 5:43 AM to 5:33 AM, and sunset from 5:46 PM to 5:45 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.15:435:46
212.15:425:46
312.15:425:46
412.15:415:46
512.15:415:45
612.15:405:45
712.15:405:45
812.15:395:45
912.15:395:45
1012.15:395:45
1112.15:385:45
1212.15:385:45
1312.15:375:45
1412.15:375:45
1512.15:375:45
1612.15:365:45
1712.15:365:45
1812.15:365:44
1912.25:355:44
2012.25:355:44
2112.25:355:45
2212.25:345:45
2312.25:345:45
2412.25:345:45
2512.25:345:45
2612.25:335:45
2712.25:335:45
2812.25:335:45
2912.25:335:45
3012.25:335:45
3112.25:335:45

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 5.85 kWh/m².

For context, solar energy here swings from a low near 4.66 kWh/m² to a high of 6 kWh/m² in September across the year — October's 5.85 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.0Intense
26.0Intense
36.0Intense
46.0Intense
56.0Bright
66.0Bright
76.0Bright
86.0Bright
96.0Bright
106.0Bright
116.0Bright
126.0Bright
136.0Bright
146.0Bright
155.9Bright
165.9Bright
175.9Bright
185.9Bright
195.8Bright
205.8Bright
215.8Bright
225.8Bright
235.7Bright
245.7Bright
255.7Bright
265.6Bright
275.6Bright
285.6Bright
295.5Bright
305.5Bright
315.5Bright
Planning a trip in October

Hazard calendar for Serang

In seasonPeak

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

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

Serang's rainy season runs November–May, when most of the year's rain falls.

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

Is October a good time to visit Serang?

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

3.4
Sightseeing
5th-best month of the year
5.0
Beach & pool
5th-best month of the year

October is a weaker month for outdoor sightseeing in Serang.

What to pack for Serang in October

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

In October, Serang sees daytime highs around 31°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 21 days see rain.

light clothesrain gearsun protection

Sea temperature near Serang in October

The nearest coast averages about 29°C in October — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 27 km away) is warmest in May at about 30°C and coldest in January near 29°C.

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

28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb29Tropical
Mar29Tropical
Apr30Tropical
May30Tropical
Jun30Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov30Tropical
Dec29Tropical

UV index in Serang in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Serang peaks around March 14 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 16 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 highMar 14UV 15Nov 16UV 7
UV index (midday)Level
Jan13Extreme
Feb13Extreme
Mar15Extreme
Apr11Extreme
May9Very high
Jun8Very high
Jul9Very high
Aug10Very high
Sep9Very high
Oct11Extreme
Nov6High
Dec12Extreme

Air quality in Serang in October

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where October falls, not just the annual average.

Air quality in Serang is worst in May — around 74 µg/m³ PM2.5 (unhealthy), about 1.9× the cleanest month (December, 38 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecPoorUnhealthyPoorMay 2073 µg/m³Dec 2438 µg/m³
PM2.5 (µg/m³)Level
Jan39Poor
Feb41Poor
Mar51Poor
Apr62Unhealthy
May74Unhealthy
Jun69Unhealthy
Jul67Unhealthy
Aug67Unhealthy
Sep70Unhealthy
Oct69Unhealthy
Nov61Unhealthy
Dec38Poor
Location & terrain

Where is Serang?

Serang sits at 6.1°S, 106.2°E, 29 m above sea level, in Indonesia. The nearest listed city is Cilegon, 16 km away.

Topography around Serang

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

Within 3 km, the terrain around Serang has only modest variations in elevation — a maximum elevation change of 43 m around an average of 29 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 489 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,912 m.

The land around Serang is covered by artificial surfaces (61%) and trees (29%) within 3 km, trees (45%) and cropland (24%) within 16 km, and water (50%) and trees (35%) within 80 km.

3 km
43 m
16 km
489 m
80 km
1,912 m
treesgrasslandcroplandartificial surfaceswaterwetland
October weather nearby: Cilegon 16 km · Pandeglang 22 km · Kresek 25 km · Rangkasbitung 29 km · Cikupa 41 km · Pasarkemis 42 km · Labuan 46 km · Sepatan 47 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 Serang (-6.1153°, 106.1542°, elevation 29 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).