Semarang weather in September
In September, Semarang has an average high of 35 °C95 °F and an average low of 24 °C74 °F, with about 67 mm2.6 in of precipitation. It is the 2nd warmest month of the year and ranks 10th for precipitation.
How September compares with other months
Compared with August, September is 1.2 °C2.2 °F warmer on average and wetter by 37 mm1.4 in. Compared with October, September is about the same temperature and drier by 51 mm2.0 in. Daylight lasts about 12.1 hours around the middle of the month. Average relative humidity is 62% and the average cloud amount 48%.
Is September a good time to visit Semarang?
September is not among the most comfortable months by our comfort score: it is hot (average high 35 °C95 °F) and it is fairly wet (67 mm2.6 in). The most comfortable months in Semarang are July.
What to wear in September
For Semarang in September, pack very light, breathable clothing, a sun hat and plenty of water.
September in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Semarang | 3595 | 2474 | 672.6 |
| Ungaran | 3391 | 2170 | 672.6 |
| Jepara | 3087 | 2679 | 542.1 |
| Magelang | 2985 | 2067 | 803.2 |
| Pati | 3696 | 2374 | 471.9 |
| Surakarta | 3493 | 2171 | 692.7 |
| Pekalongan | 3290 | 2272 | 652.6 |
| Yogyakarta | 3086 | 2272 | 662.6 |
| Purwokerto | 3086 | 2169 | 903.6 |
Nearby places that are more than 1 °C1.8 °F cooler: Ungaran, Magelang, Surakarta and Pekalongan.
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 September?
In September the average high in Semarang is 35 °C (95 °F) and the average low is 24 °C (74 °F).
Does it rain a lot in Semarang in September?
On average about 67 mm (2.6 in) of precipitation falls in September; it ranks 10th of the 12 months.
Is September the warmest month in Semarang?
Yes. September is the warmest month in Semarang. The coldest month is July, with an average low of 22 °C (72 °F).
How long is the day in Semarang in September?
In the middle of September the day in Semarang lasts about 12.1 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Semarang in September?
The average relative humidity in September is about 62%. This is a long-term average for the whole day.
How cloudy is Semarang in September?
On average about 48% of the sky is covered by cloud in September. 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.