Semarang weather in January
In January, Semarang has an average high of 29 °C85 °F and an average low of 25 °C76 °F, with about 354 mm14 in of precipitation. It is the 9th warmest month of the year and the wettest.
How January compares with other months
Compared with December, January is about the same temperature and wetter by 81 mm3.2 in. Compared with February, January is about the same temperature. Daylight lasts about 12.5 hours around the middle of the month. Average relative humidity is 86% and the average cloud amount 92%.
Is January a good time to visit Semarang?
January is not among the most comfortable months by our comfort score: it is hot (average high 29 °C85 °F), it is fairly wet (354 mm14 in) and it is humid (86%). The most comfortable months in Semarang are July.
What to wear in January
For Semarang in January, pack light summer clothes such as T-shirts, shorts or light dresses and a good rain jacket or umbrella and quick-drying shoes.
January in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Semarang | 2985 | 2576 | 35414 |
| Ungaran | 2781 | 2373 | 35414 |
| Jepara | 2883 | 2780 | 38215 |
| Magelang | 2781 | 2272 | 34113 |
| Pati | 2985 | 2475 | 35114 |
| Surakarta | 2985 | 2374 | 34614 |
| Pekalongan | 2985 | 2476 | 33113 |
| Yogyakarta | 2883 | 2476 | 34614 |
| Purwokerto | 2984 | 2374 | 32713 |
Nearby places that are more than 1 °C1.8 °F cooler: Ungaran and Magelang.
Other months in Semarang
- January29 °C85 °F / 25 °C76 °F
- February29 °C84 °F / 25 °C76 °F
- March30 °C85 °F / 25 °C77 °F
- April30 °C86 °F / 25 °C77 °F
- May30 °C86 °F / 24 °C76 °F
- June30 °C87 °F / 23 °C74 °F
- July31 °C88 °F / 22 °C72 °F
- August33 °C92 °F / 23 °C73 °F
- September35 °C95 °F / 24 °C74 °F
- October34 °C93 °F / 25 °C76 °F
- November32 °C89 °F / 25 °C77 °F
- December30 °C86 °F / 25 °C77 °F
Frequently asked questions
How warm is Semarang in January?
In January the average high in Semarang is 29 °C (85 °F) and the average low is 25 °C (76 °F).
Does it rain a lot in Semarang in January?
On average about 354 mm (13.9 in) of precipitation falls in January; it ranks 1st of the 12 months.
Is January the warmest month in Semarang?
No. The warmest month in Semarang is September, with an average high of 35 °C (95 °F). The coldest month is July, with an average low of 22 °C (72 °F).
How long is the day in Semarang in January?
In the middle of January the day in Semarang lasts about 12.5 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Semarang in January?
The average relative humidity in January is about 86%. Combined with warm days, it can feel muggy.
How cloudy is Semarang in January?
On average about 92% of the sky is covered by cloud in January. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 138 m, while Semarang lies at about 18 m. Temperatures on this page were therefore adjusted by +0.8 °C1.4 °F using the standard lapse rate of 6.5 °C per 1,000 m.