Cilegon weather in June

In June, Cilegon sees average daytime highs of 30°C and overnight lows near 25°C, with 120 mm of rain across 20.1 wet days and about 11.7 hours of daylight. It is the 4th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 25% of the time in June, and the air most often feels miserable.

Daylight stretches from about 11 h 42 min at the start of June to 11 h 42 min by month's end. Set against the rest of the year, June is Cilegon's 3rd-clearest and 8th-windiest month. For the whole year in context, see Cilegon's year-round climate.

Daytime high
30°
4th warmest
Overnight low
25°
8th coldest
Rainfall
120 mm
20.1 wet days
Daylight
11 h 42 min
6:06 AM – 5:46 PM
Cloud cover
63%
3rd clearest
Wind
6 km/h
8th windiest
Solar energy
4.81 kWh/m²
Travel score
3.9
out of 10

Cilegon is city in Banten Province, Indonesia.

Density
2,680/km²
people per km²
Founded
1999

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

Temperature in June

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical June day in Cilegon reaches about 30°C in the afternoon and slips back to 25°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 31°C. Set against its neighbours, June runs on par with May and on par with July.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13025
23025
33025
43025
53025
63025
73025
83025
93025
103025
113025
123025
133025
143025
153025
163025
173025
183025
193025
203025
213025
223025
233025
243025
253025
263025
273025
282925
292925
302925

How June really feels in Cilegon

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

Cilegon weather by month

How June compares with the rest of the year at a glance. June 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
Jan29° / 25°28528.612.33.1
Feb29° / 25°26126.112.23.0
Mar29° / 25°25128123.0
Apr30° / 26°21826.511.93.0
May30° / 26°16523.811.73.4
Jun30° / 25°12020.111.73.9
Jul29° / 25°9418.111.74.4
Aug29° / 24°701711.84.5
Sep30° / 25°7415.9124.3
Oct30° / 25°13420.312.13.7
Nov30° / 25°22325.212.33.2
Dec29° / 25°29327.112.33.2

Cloud cover in June

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% of the time in June.

Beyond those clear spells, partly cloudy skies cover about 22% of June, with mostly cloudy or overcast conditions the remaining 53%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14357
24456
34357
44357
54456
64456
74456
84456
94456
104555
114555
124555
134555
144555
154753
164852
174852
184951
194951
205050
215050
225050
235050
244951
254951
265050
275050
284951
295050
304852

Chance of precipitation in June

Any precipitation

Cilegon gets around 120 mm of rain over 20.1 wet days in June. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 67% and peaks near 73% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
172
272
372
472
573
673
773
873
973
1073
1172
1272
1371
1470
1569
1668
1767
1866
1965
2064
2163
2262
2361
2461
2560
2660
2760
2860
2960
3060

Humidity in June

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, June lands in the miserable band about 53% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
112970
212970
313069
413069
513168
613168
713267
813366
903565
1003664
1103862
1204060
1304258
1404456
1504654
1604852
1705050
1805248
1905347
2005545
2105743
2205842
2306040
2406139
2506337
2606436
2706535
2806733
2906832
3006931

Wind in June

Winds average 6 km/h in June.

Across June, 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.

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

Sunrise & sunset in June

DaylightNight

Daylight runs from about 11 h 42 min at the start of June to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 0 minutes over June. Sunrise moves from 6:03 AM to 6:09 AM, and sunset from 5:44 PM to 5:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.76:035:44
211.76:035:44
311.76:035:44
411.76:045:44
511.76:045:44
611.76:045:44
711.76:045:44
811.76:055:44
911.76:055:44
1011.76:055:45
1111.76:055:45
1211.76:055:45
1311.76:065:45
1411.76:065:45
1511.76:065:45
1611.76:065:46
1711.76:075:46
1811.76:075:46
1911.76:075:46
2011.76:075:46
2111.76:085:47
2211.76:085:47
2311.76:085:47
2411.76:085:47
2511.76:085:47
2611.76:095:48
2711.76:095:48
2811.76:095:48
2911.76:095:48
3011.76:095:49

Solar energy in June

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in June, about 4.81 kWh/m².

For context, solar energy here swings from a low near 4.69 kWh/m² to a high of 6.03 kWh/m² in September across the year — June's 4.81 kWh/m² sits near the bottom.

024151015202530
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.9Bright
44.8Bright
54.8Bright
64.8Bright
74.8Bright
84.8Bright
94.8Bright
104.8Bright
114.8Bright
124.8Bright
134.8Bright
144.8Bright
154.8Bright
164.8Bright
174.8Bright
184.8Bright
194.8Bright
204.8Bright
214.8Bright
224.8Bright
234.8Bright
244.8Bright
254.8Bright
264.8Bright
274.8Bright
284.8Bright
294.9Bright
304.9Bright
Planning a trip in June

Hazard calendar for Cilegon

In seasonPeak

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

Cilegon 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 June a good time to visit Cilegon?

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

3.9
Sightseeing
4th-best month of the year
5.2
Beach & pool
4th-best month of the year

June is a weaker month for outdoor sightseeing in Cilegon.

What to pack for Cilegon in June

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

In June, Cilegon sees daytime highs around 30°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 20 days see rain.

light clothesrain gearsun protection

Sea temperature near Cilegon in June

The nearest coast averages about 30°C in June — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 17 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 Cilegon in June

LowModerateHighVery highExtreme

Clear-sky midday UV in June peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Cilegon 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 Cilegon in June

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Cilegon is worst in August — around 37 µg/m³ PM2.5 (poor), about 2.7× the cleanest month (December, 14 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateModeratePoorModerateAug 2037 µg/m³Dec 2114 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb18Moderate
Mar17Moderate
Apr24Moderate
May36Poor
Jun33Moderate
Jul35Poor
Aug37Poor
Sep36Poor
Oct33Moderate
Nov22Moderate
Dec14Moderate
Location & terrain

Where is Cilegon?

Cilegon sits at 6.0°S, 106.1°E, 18 m above sea level, in Indonesia. The nearest listed city is Serang, 16 km away.

Topography around Cilegon

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

Within 3 km, the terrain around Cilegon has only modest variations in elevation — a maximum elevation change of 67 m around an average of 17 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 634 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,756 m.

The land around Cilegon is covered by artificial surfaces (48%) and trees (26%) within 3 km, trees (40%) and water (31%) within 16 km, and water (56%) and trees (30%) within 80 km.

3 km
67 m
16 km
634 m
80 km
1,756 m
treesgrasslandcroplandartificial surfacesbare terrainwater
June weather nearby: Serang 16 km · Pandeglang 33 km · Kresek 38 km · Rangkasbitung 44 km · Labuan 47 km · Pasarkemis 55 km · Cikupa 56 km · Sepatan 59 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 Cilegon (-6.0144°, 106.0542°, elevation 18 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).