Serang weather in April

In April, Serang sees average daytime highs of 31°C and overnight lows near 26°C, with 190 mm of rain across 25.5 wet days and about 11.9 hours of daylight. It is the 3rd-warmest and 6th-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 8% of the time in April, and the air most often feels miserable.

Daylight stretches from about 11 h 54 min at the start of April to 11 h 48 min by month's end. Set against the rest of the year, April is Serang's 7th-clearest and 6th-windiest month. For the whole year in context, see Serang's year-round climate.

Daytime high
31°
3rd warmest
Overnight low
26°
12th coldest
Rainfall
190 mm
25.5 wet days
Daylight
11 h 54 min
6:00 AM – 5:52 PM
Cloud cover
77%
7th clearest
Wind
7 km/h
6th windiest
Solar energy
5.1 kWh/m²
Travel score
2.9
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 April

Average highAverage lowShaded bands: 10–90% of days

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

A typical April 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 29°C and 32°C. Set against its neighbours, April runs on par with March and on par with May.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13026
23026
33026
43026
53026
63126
73126
83126
93126
103126
113126
123126
133126
143126
153126
163126
173126
183126
193126
203126
213126
223126
233126
243126
253126
263126
273126
283126
293126
303126

How April really feels in Serang

Once humidity and wind are folded in, April 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 April is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Serang weather by month

How April compares with the rest of the year at a glance. April is the 3rd-warmest and 6th-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 April

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 14% of April, with mostly cloudy or overcast conditions the remaining 78%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11783
21882
31882
41882
51882
61981
71981
81981
92080
102080
112080
122080
132080
142179
152179
162278
172278
182278
192278
202476
212476
222575
232575
242575
252674
262674
272674
282773
292971
302971

Chance of precipitation in April

Any precipitation

Serang gets around 190 mm of rain over 25.5 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 85% and peaks near 89% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%100%151015202530
Rain chance (%)
189
289
388
488
588
688
787
887
987
1086
1186
1285
1385
1485
1584
1684
1784
1884
1983
2083
2183
2283
2382
2482
2582
2682
2782
2882
2981
3081

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the miserable band about 96% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
1694
2694
3694
4694
5694
6694
7694
8595
9595
10595
11595
12595
13496
14496
15496
16496
17496
18397
19397
20397
21397
22298
23298
24298
25298
26199
27199
28199
29199
30199

Wind in April

Winds average 7 km/h in April.

Across April, 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
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

Sunrise & sunset in April

DaylightNight

Daylight runs from about 11 h 54 min at the start of April to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over April. Sunrise moves from 6:02 AM to 5:59 AM, and sunset from 5:59 PM to 5:47 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:025:59
211.96:015:58
311.96:015:58
411.96:015:57
511.96:015:57
611.96:015:56
711.96:015:56
811.96:015:55
911.96:005:55
1011.96:005:54
1111.96:005:54
1211.96:005:53
1311.96:005:53
1411.96:005:52
1511.96:005:52
1611.96:005:52
1711.96:005:51
1811.95:595:51
1911.85:595:50
2011.85:595:50
2111.85:595:50
2211.85:595:49
2311.85:595:49
2411.85:595:48
2511.85:595:48
2611.85:595:48
2711.85:595:47
2811.85:595:47
2911.85:595:47
3011.85:595:47

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 5.1 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 — April's 5.1 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.2Bright
45.2Bright
55.2Bright
65.2Bright
75.2Bright
85.2Bright
95.2Bright
105.2Bright
115.2Bright
125.2Bright
135.2Bright
145.2Bright
155.2Bright
165.1Bright
175.1Bright
185.1Bright
195.1Bright
205.1Bright
215.1Bright
225.0Bright
235.0Bright
245.0Bright
255.0Bright
265.0Bright
275.0Bright
285.0Bright
295.0Bright
305.0Bright
Planning a trip in April

Hazard calendar for Serang

In seasonPeak

In April, Serang sits inside its cyclone and rainy season season. The full year is below, with each hazard's peak months called out.

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 April a good time to visit Serang?

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

2.9
Sightseeing
8th-best month of the year
4.1
Beach & pool
7th-best month of the year

April is a weaker month for outdoor sightseeing in Serang.

What to pack for Serang in April

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

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

light clothesrain gearsun protection

Sea temperature near Serang in April

The nearest coast averages about 30°C in April — 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 April

LowModerateHighVery highExtreme

Clear-sky midday UV in April 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 April

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where April 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
April 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).