Yes

you do need a jacket based on the weather in Brussels, Belgium 1 second ago

Why? Because it's so windy, your hat has officially retired from your head!
59°F15°C & Partly Cloudy

Wind is 9 mph15 km/h from the Southwest, gusting to 20 mph32 km/h
August 29
8pm59°F15°C10 mph16 km/h SouthwestDrizzle
9pm58°F15°C10 mph16 km/h SouthwestPartly Cloudy
10pm58°F14°C10 mph16 km/h SouthwestPartly Cloudy
11pm58°F14°C10 mph16 km/h SouthwestPartly Cloudy
August 30
12am57°F14°C10 mph16 km/h SouthwestPartly Cloudy
1am58°F14°C9 mph15 km/h SouthwestPartly Cloudy
2am58°F15°C10 mph16 km/h SouthwestPartly Cloudy
3am60°F15°C11 mph18 km/h SouthwestPartly Cloudy
4am62°F17°C11 mph18 km/h SouthwestPartly Cloudy
5am64°F18°C12 mph19 km/h SouthwestPartly Cloudy
6am66°F19°C12 mph19 km/h SouthwestPartly Cloudy
7am68°F20°C12 mph20 km/h SouthwestMostly Cloudy
DateLowHighWindDayNight
August 2957°F14°C71°F22°C12 mph19 km/h from SouthwestPartly CloudyCloudy
August 3062°F17°C73°F23°C11 mph17 km/h from SouthwestDrizzleDrizzle
August 3158°F15°C71°F22°C12 mph19 km/h from SouthwestPartly CloudyPartly Cloudy
September 156°F13°C69°F20°C13 mph20 km/h from SouthwestPartly CloudyDrizzle
September 257°F14°C69°F20°C12 mph19 km/h from SouthwestDrizzleDrizzle
September 362°F17°C75°F24°C12 mph19 km/h from SouthThunderstormsDrizzle
September 460°F15°C71°F22°C10 mph15 km/h from SouthwestDrizzlePartly Cloudy

No

Low of 62°F17°C, High of 73°F23°C
Wind: 11 mph17 km/h
Precipitation: 47% rain

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