Climate averages 1991–2020
Semarang weather
in December.
A hot, very wet month: the joint 9th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in Semarang: daytime highs average 28.4°C and nights cool to about 23.5°C. By daytime temperature it is the joint 9th warmest of the 12 months.
Expect about 416 mm of rain on roughly 29 days, which makes December a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 31 min on an average December day.
The nearest other city in this atlas is Ungaran (16 km away). In December its highs average 27.3°C, 1.1°C cooler than Semarang, with 467 mm of rain.
Among the 200 cities listed in Indonesia, Semarang ranks joint 116th of 200 for the warmest December highs and 165th of 200 for the driest December (rainfall, lowest first). The mean December high of those 200 cities is 28.4°C; Semarang is level with that mean.
From December to January, average highs fall by 0.7°C to 27.7°C, and monthly rainfall falls from 416 mm to 391 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
Semarang climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 27.7°C23.5°C | 23.5°C | 391 | 29.9 | 12.512 h |
| February | 27.7°C23.5°C | 23.5°C | 356 | 27.4 | 12.312 h |
| March | 28.4°C23.4°C | 23.4°C | 345 | 29.3 | 12.112 h |
| April | 29.1°C23.4°C | 23.4°C | 237 | 25.9 | 12.012 h |
| May | 29.6°C23.3°C | 23.3°C | 102 | 16.4 | 11.812 h |
| June | 29.9°C23.0°C | 23.0°C | 60 | 10.4 | 11.712 h |
| July | 30.4°C22.7°C | 22.7°C | 38 | 6.5 | 11.812 h |
| August | 31.1°C22.8°C | 22.8°C | 23 | 3.9 | 11.912 h |
| September | 31.7°C23.6°C | 23.6°C | 44 | 6.1 | 12.112 h |
| October | 31.3°C24.1°C | 24.1°C | 139 | 15.3 | 12.312 h |
| November | 29.7°C23.9°C | 23.9°C | 282 | 25.6 | 12.412 h |
| December, selected | 28.4°C23.5°C | 23.5°C | 416 | 29.2 | 12.513 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
- Ungaran in DecemberIndonesia · 16 kmHigh 27.3°C · Low 21.6°C · 467 mm rain
- Salatiga in DecemberIndonesia · 39 kmHigh 27.2°C · Low 20.8°C · 467 mm rain
- Kudus in DecemberIndonesia · 51 kmHigh 30.0°C · Low 23.4°C · 424 mm rain
- Jepara in DecemberIndonesia · 52 kmHigh 29.0°C · Low 24.6°C · 420 mm rain
- Purwodadi in DecemberIndonesia · 56 kmHigh 29.9°C · Low 23.1°C · 317 mm rain
- Magelang in DecemberIndonesia · 58 kmHigh 27.0°C · Low 20.7°C · 394 mm rain
- Batang in DecemberIndonesia · 65 kmHigh 29.1°C · Low 25.1°C · 420 mm rain
- Muntilan in DecemberIndonesia · 67 kmHigh 27.2°C · Low 21.2°C · 394 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 Semarang) is explained once on the Semarang year overview and on the Sources, method and limits page.