Climate averages 1991–2020
Cilegon weather
in December.
A hot, very wet month: the coolest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in Cilegon: daytime highs average 28.3°C and nights cool to about 24.5°C. By daytime temperature it is the coolest month of the year.
Expect about 293 mm of rain on roughly 27 days, which makes December a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 28 min on an average December day.
The nearest other city in this atlas is Serang (16 km away). In December its highs average 28.7°C, about as warm as Cilegon, with 256 mm of rain.
Among the 200 cities listed in Indonesia, Cilegon ranks joint 125th of 200 for the warmest December highs and 60th of 200 for the driest December (rainfall, lowest first). The mean December high of those 200 cities is 28.4°C; Cilegon is 0.1°C cooler than that mean.
From December to January, average highs stay level at 28.4°C, and monthly rainfall falls from 293 mm to 286 mm.
The annual picture
December in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Cilegon climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.4°C24.3°C | 24.3°C | 286 | 28.7 | 12.412 h |
| February | 28.6°C24.4°C | 24.4°C | 264 | 26.4 | 12.312 h |
| March | 28.9°C24.7°C | 24.7°C | 251 | 28.0 | 12.112 h |
| April | 29.2°C24.8°C | 24.8°C | 218 | 26.5 | 12.012 h |
| May | 29.4°C24.8°C | 24.8°C | 165 | 23.8 | 11.812 h |
| June | 29.2°C24.4°C | 24.4°C | 120 | 20.1 | 11.812 h |
| July | 29.1°C23.9°C | 23.9°C | 94 | 18.1 | 11.812 h |
| August | 29.5°C23.9°C | 23.9°C | 70 | 16.9 | 11.912 h |
| September | 30.1°C24.2°C | 24.2°C | 74 | 15.8 | 12.112 h |
| October | 30.2°C24.7°C | 24.7°C | 134 | 20.3 | 12.212 h |
| November | 29.3°C24.7°C | 24.7°C | 223 | 25.2 | 12.412 h |
| December, selected | 28.3°C24.5°C | 24.5°C | 293 | 27.1 | 12.512 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
December in nearby cities
- Serang in DecemberIndonesia · 16 kmHigh 28.7°C · Low 24.2°C · 256 mm rain
- Pandeglang in DecemberIndonesia · 33 kmHigh 27.7°C · Low 22.8°C · 365 mm rain
- Kresek in DecemberIndonesia · 38 kmHigh 29.1°C · Low 24.0°C · 275 mm rain
- Rangkasbitung in DecemberIndonesia · 44 kmHigh 28.8°C · Low 23.3°C · 300 mm rain
- Pasarkemis in DecemberIndonesia · 55 kmHigh 29.0°C · Low 23.4°C · 275 mm rain
- Curug in DecemberIndonesia · 62 kmHigh 29.3°C · Low 23.0°C · 275 mm rain
- Teluknaga in DecemberIndonesia · 65 kmHigh 29.5°C · Low 24.0°C · 234 mm rain
- Tangerang in DecemberIndonesia · 66 kmHigh 29.2°C · Low 23.4°C · 264 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Cilegon) is explained once on the Cilegon year overview and on the Sources, method and limits page.