Sumber Weather in December
What's the weather like in Sumber (Central Java) in December 2025?
The climate in Sumber during December can be summarized as hot, humid and very wet.
December is in the summer in Sumber and is typically the 6th coldest month of the year. Daytime maximum temperatures average around a steamy 31°C (88°F), whilst at night 22°C (72°F) is normal.
| Daytime temperature | 31.2°C 88.2°F |
|---|---|
| Nightly temperature | 22.4°C 72.3°F |
| Average temperature | 26.8°C 80.2°F |
| Daily sunshine | 6.5 hrs |
| Avg rainfall | 251 mm 9.9 ins |
| Rainy days | 17 days |
| Sea temperature | 29.6°C 85.2°F |
| Humidity | 83% |
| Windspeed | 10.1kph 6 mph |
On average December is the 2nd wettest month of the year in Sumber with around 251mm 9.9 inches of rain making it a very wet time to visit. This rainfall is typically spread over 17 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.5 hours of sunshine per day.
December temperatures in Sumber
December rainfall
December hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Sumber in December 2025.
Other monthly averages
Best places to visit in December
Sumber weather stats
| Hottest month: | October | 32.9°C 91.2°F |
|---|---|---|
| Driest month: | July | 43mm 1.7ins |
| Sunniest month: | August | 10.6hrs |
| Coldest month: | July | 31.6°C 88.9°F |
| Wettest month: | January | 352mm 13.9ins |
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