Yes

you do need a jacket based on the weather in Jakarta, Indonesia 1 second ago

Why? Because rain's coming down!
77°F25°C & Rain

Wind is 3 mph5 km/h from the South, gusting to 5 mph8 km/h
May 24
5pm77°F25°C3 mph4 km/h SouthDrizzle
6pm77°F25°C3 mph4 km/h SouthDrizzle
7pm77°F25°C2 mph4 km/h SouthDrizzle
8pm78°F25°C2 mph4 km/h SouthwestDrizzle
9pm79°F26°C2 mph4 km/h SoutheastCloudy
10pm81°F27°C3 mph4 km/h NortheastCloudy
11pm84°F29°C2 mph4 km/h NorthCloudy
May 25
12am85°F30°C2 mph4 km/h NorthCloudy
1am86°F30°C3 mph4 km/h NorthMostly Cloudy
2am87°F30°C3 mph5 km/h NorthMostly Cloudy
3am87°F31°C4 mph7 km/h NorthMostly Cloudy
4am87°F30°C4 mph7 km/h NorthwestMostly Cloudy
DateLowHighWindDayNight
May 2477°F25°C87°F31°C3 mph5 km/h from NorthwestRainRain
May 2577°F25°C85°F29°C5 mph7 km/h from WestRainMostly Cloudy
May 2676°F24°C90°F32°C6 mph9 km/h from NorthwestPartly CloudyPartly Cloudy
May 2776°F25°C92°F33°C5 mph7 km/h from NorthwestMostly ClearMostly Clear
May 2878°F25°C91°F33°C5 mph8 km/h from NortheastPartly CloudyPartly Cloudy
May 2978°F26°C92°F33°C4 mph7 km/h from NortheastPartly CloudyPartly Cloudy
May 3078°F26°C92°F33°C5 mph7 km/h from NortheastPartly CloudyThunderstorms

No

Low of 77°F25°C, High of 85°F30°C
Wind: 5 mph7 km/h
Precipitation: 89% rain

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