Cilegon in Fall
In fall (March, April and May), Cilegon sees average daytime highs around 30°C and overnight lows near 25°C, with 634 mm of rain over about 78 wet days across the season. It is the 2nd-warmest season and the 2nd-wettest season.
Across fall, daytime highs hold fairly steady around 30°C. The sky is clear or mostly clear about 9% of the time across fall, and the air most often feels miserable.
Fall is Cilegon's 3rd-best season to visit on our travel score. Cilegon has little temperature swing across the year, so its calendar seasons blur — the season framing matters less here than for a place with four distinct seasons. For the whole year in context, see Cilegon's year-round climate.
- Avg daytime high
- 30°C
- 2nd-warmest season
- Avg overnight low
- 25°C
- Rainfall
- 634 mm
- 78 wet days
- Avg wind
- 8 km/h
- Travel score
- 3.1
- 3rd-best season
- Months
- Mar · Apr · May
Temperature in Cilegon in Fall
Across fall, daytime highs hold fairly steady around 30°C.
A typical fall day in Cilegon reaches about 30°C and drops to 25°C overnight. The warmest of the three months is May, the coolest March.
How fall really feels in Cilegon
Once humidity and wind are folded in, fall brings about 92 days that feel above 32°C and 0 that feel at or below 0°C.
The story in fall is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Cilegon weather by month
How the three fall months (March, April and May) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 29° / 25° | 285 | 28.6 | 12.3 | 3.1 |
| Feb | 29° / 25° | 261 | 26.1 | 12.2 | 3.0 |
| Mar | 29° / 25° | 251 | 28 | 12 | 3.0 |
| Apr | 30° / 26° | 218 | 26.5 | 11.9 | 3.0 |
| May | 30° / 26° | 165 | 23.8 | 11.7 | 3.4 |
| Jun | 30° / 25° | 120 | 20.1 | 11.7 | 3.9 |
| Jul | 29° / 25° | 94 | 18.1 | 11.7 | 4.4 |
| Aug | 29° / 24° | 70 | 17 | 11.8 | 4.5 |
| Sep | 30° / 25° | 74 | 15.9 | 12 | 4.3 |
| Oct | 30° / 25° | 134 | 20.3 | 12.1 | 3.7 |
| Nov | 30° / 25° | 223 | 25.2 | 12.3 | 3.2 |
| Dec | 29° / 25° | 293 | 27.1 | 12.3 | 3.2 |
Cloud cover in Fall
The sky is clear or mostly clear about 9% of the time across fall.
Chance of precipitation in Fall
Cilegon gets around 634 mm of rain over 78 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 8 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 06 min in early March to 11 h 42 min by late May. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 5.1 kWh/m².
Hazard calendar for Cilegon
In fall, Cilegon overlaps its cyclone season. The full year is below, with each hazard's peak months called out.
Cilegon sits in the South Indian Ocean cyclone belt; the season peaks January–March.
Is fall a good time to visit Cilegon?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is a weaker month for outdoor sightseeing in Cilegon.
What to pack for Cilegon in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Cilegon sees daytime highs around 30°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 78 days see rain.
Sea temperature near Cilegon in Fall
The nearest coast averages about 29°C across fall — 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 29 | 29 | 29 | 30 | 30 | 30 | 29 | 29 | 29 | 29 | 30 | 29 |
| Comfort | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 29 | Tropical |
| Feb | 29 | Tropical |
| Mar | 29 | Tropical |
| Apr | 30 | Tropical |
| May | 30 | Tropical |
| Jun | 30 | Tropical |
| Jul | 29 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 30 | Tropical |
| Dec | 29 | Tropical |
UV index in Cilegon in Fall
Clear-sky midday UV across fall averages 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 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 13 | 13 | 15 | 11 | 9 | 8 | 9 | 10 | 9 | 11 | 6 | 12 |
| Level | Extreme | Extreme | Extreme | Extreme | Very high | Very high | Very high | Very high | Very high | Extreme | High | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 13 | Extreme |
| Feb | 13 | Extreme |
| Mar | 15 | Extreme |
| Apr | 11 | Extreme |
| May | 9 | Very high |
| Jun | 8 | Very high |
| Jul | 9 | Very high |
| Aug | 10 | Very high |
| Sep | 9 | Very high |
| Oct | 11 | Extreme |
| Nov | 6 | High |
| Dec | 12 | Extreme |
Air quality in Cilegon in Fall
Average fine-particle pollution (PM2.5) through the year — so you can see where fall 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).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 16 | 18 | 17 | 24 | 36 | 33 | 35 | 37 | 36 | 33 | 22 | 14 |
| Level | Moderate | Moderate | Moderate | Moderate | Poor | Moderate | Poor | Poor | Poor | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 16 | Moderate |
| Feb | 18 | Moderate |
| Mar | 17 | Moderate |
| Apr | 24 | Moderate |
| May | 36 | Poor |
| Jun | 33 | Moderate |
| Jul | 35 | Poor |
| Aug | 37 | Poor |
| Sep | 36 | Poor |
| Oct | 33 | Moderate |
| Nov | 22 | Moderate |
| Dec | 14 | Moderate |
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.
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
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.