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Semarang weather in September 2025
Expect 34°C daytime maximum temperatures in the shade with on average 10 hours of sunshine per day in Semarang in September. Check more long-term weather averages for Semarang in September before you book your next holiday to Indonesia in 2025/2026.
- 3434°C max day temperature
- 10 hours of sunshine per day
- 44 days with some rainfall
- 2222°C min night temperature
- 1212 hours of daylight per day
- VHVery High heat & humidity
- 6262 mm of monthly rainfall
- 1111+ (Extreme) UV index
- 2828°C sea temperature
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Recommended for Indonesia
The September weather guide for Indonesia (Semarang) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Metric (°C / mm) | Imperial (°F / inches)
More about Indonesia
How hot is it in Semarang in September?
Daytime temperatures usually reach 34°C in Semarang in September with very high heat and humidity, falling to 22°C at night.
How sunny is it in Semarang in September?
There are normally 10 hours of bright sunshine each day in Semarang in September - that's 80% of daylight hours.
How warm is the sea around Semarang in September?
The average sea temperature around Semarang in September is 28°C.
Does it rain in Semarang in September?
There are usually 4 days with some rain in Semarang in September and the average monthly rainfall is 62mm.
Semarang September sunrise & sunset times
Browse the sunrise and sunset times for Semarang in September 2025. Select a month to view Semarang sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
Date | Sunrise times | Sunset times |
---|---|---|
Monday, 1st September 2025 | 05:39 | 17:38 |
Monday, 15th September 2025 | 05:32 | 17:35 |
Tuesday, 30th September 2025 | 05:24 | 17:33 |
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