Climate averages 1991–2020
Semarang weather
in January.
A warm, very wet month: one of the coolest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a warm month in Semarang: daytime highs average 27.7°C and nights cool to about 23.5°C. By daytime temperature it is one of the coolest months of the year.
Expect about 391 mm of rain on roughly 30 days, which makes January a very wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 29 min on an average January day.
The nearest other city in this atlas is Ungaran (16 km away). In January its highs average 26.6°C, 1.1°C cooler than Semarang, with 502 mm of rain.
Among the 200 cities listed in Indonesia, Semarang ranks joint 154th of 200 for the warmest January highs and joint 159th of 200 for the driest January (rainfall, lowest first). The mean January high of those 200 cities is 28.2°C; Semarang is 0.5°C cooler than that mean.
From January to February, average highs stay level at 27.7°C, and monthly rainfall falls from 391 mm to 356 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
Semarang climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 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 | 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
January in nearby cities
- Ungaran in JanuaryIndonesia · 16 kmHigh 26.6°C · Low 21.5°C · 502 mm rain
- Salatiga in JanuaryIndonesia · 39 kmHigh 26.7°C · Low 20.6°C · 502 mm rain
- Kudus in JanuaryIndonesia · 51 kmHigh 29.1°C · Low 23.4°C · 408 mm rain
- Jepara in JanuaryIndonesia · 52 kmHigh 28.3°C · Low 24.4°C · 441 mm rain
- Purwodadi in JanuaryIndonesia · 56 kmHigh 29.0°C · Low 22.9°C · 311 mm rain
- Magelang in JanuaryIndonesia · 58 kmHigh 27.2°C · Low 20.7°C · 421 mm rain
- Batang in JanuaryIndonesia · 65 kmHigh 28.4°C · Low 24.9°C · 441 mm rain
- Muntilan in JanuaryIndonesia · 67 kmHigh 27.3°C · Low 21.1°C · 421 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.