Climate averages 1991–2020
Cilegon weather
in January.
A hot, very wet month: the 11th warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a hot month in Cilegon: daytime highs average 28.4°C and nights cool to about 24.3°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 286 mm of rain on roughly 29 days, which makes January a very wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 26 min on an average January day.
The nearest other city in this atlas is Serang (16 km away). In January its highs average 28.6°C, about as warm as Cilegon, with 278 mm of rain.
Among the 200 cities listed in Indonesia, Cilegon ranks joint 115th of 200 for the warmest January highs and joint 75th of 200 for the driest January (rainfall, lowest first). The mean January high of those 200 cities is 28.2°C; Cilegon is 0.2°C warmer than that mean.
From January to February, average highs rise by 0.2°C to 28.6°C, and monthly rainfall falls from 286 mm to 264 mm.
The annual picture
January 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, selected | 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 | 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
January in nearby cities
- Serang in JanuaryIndonesia · 16 kmHigh 28.6°C · Low 24.1°C · 278 mm rain
- Pandeglang in JanuaryIndonesia · 33 kmHigh 27.6°C · Low 22.6°C · 327 mm rain
- Kresek in JanuaryIndonesia · 38 kmHigh 28.8°C · Low 23.9°C · 279 mm rain
- Rangkasbitung in JanuaryIndonesia · 44 kmHigh 28.7°C · Low 23.1°C · 308 mm rain
- Pasarkemis in JanuaryIndonesia · 55 kmHigh 28.7°C · Low 23.2°C · 279 mm rain
- Curug in JanuaryIndonesia · 62 kmHigh 28.9°C · Low 22.8°C · 279 mm rain
- Teluknaga in JanuaryIndonesia · 65 kmHigh 29.0°C · Low 23.9°C · 322 mm rain
- Tangerang in JanuaryIndonesia · 66 kmHigh 28.7°C · Low 23.2°C · 298 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.