Semarang Weather in September
Semarang in September sees very high temperatures, with highs around 33°C (91°F) and overnight lows of 24°C (75°F). Around 48 mm (1.9 in) of rainfall is typical, so a light rain jacket is a sensible addition to your bag.
Rainfall in Semarang in September
Past climate data indicates that roughly 5 days will see rain, totalling around 48 mm (1.9 in) for the month. When rain does fall this month, it tends to come down hard. The low number of rain days makes each shower more significant.
Temperature in Semarang in September
Daytime temperatures in Semarang reach 33°C (91°F) in September, dropping to 24°C (75°F) at night. Sunshine and humidity can make it feel even warmer than the raw temperature suggests. At 24°C (75°F) overnight, it stays warm after dark. Light, breathable clothing and good airflow in your room make a noticeable difference. Keep in mind that temperatures can exceed these averages. Dress for the heat and stay hydrated, especially during peak sun hours.Our weather planner can help you find worldwide destinations with pleasant weather during this period. June, July and August typically offer the best weather for Semarang.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Indonesia, check out our Semarang's climate page.
Semarang Temperature in September
Min Temperature
24°C (75°F)
Max Temperature
33°C (91°F)
Chance of Rain
15%
Precipitation
48 mm (1.9 in)
Rainy days
5 days
Daily Historical Temperatures
48-year average (1976-2025)
Based on our historical records, temperatures in Semarang typically stay consistent throughout September, with daily highs averaging around 33°C (91°F). Nights are warm, with lows around 24°C (75°F).
Average temperatures in September
Daily Historical Precipitation
48-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Semarang in September
Browse day-by-day weather records for Semarang spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Semarang historical weather extremes in September
Based on 22 years of weather observations (2003-2025), these are the most extreme conditions recorded in Semarang.
- The warmest day in September was on September 12, 2023, with a maximum of 37°C (99°F).
- The coldest September day was on September 23, 2003, with a maximum of 26°C (79°F).
- The lowest overnight temperature recorded in September was 20°C (68°F) (September 4, 2006).
Best Places in Indonesia in September
Find out more about the weather in Indonesia and which places have the best travel conditions in this month. See all of Indonesia in September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Semarang in September
Warm but pleasant conditions in Semarang in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Wet weather is likely, so pack waterproof gear for multiple rainy days.What To Do in Semarang in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Indonesia, check out our Semarang's climate page.
See the full Semarang climate overview or explore weather in Indonesia.
