Yes

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

Why? Because looks like it's raining!
62°F17°C & Rain

Wind is 8 mph13 km/h from the Northwest, gusting to 18 mph29 km/h
August 2
5am64°F18°C9 mph15 km/h NorthwestRain
6am65°F18°C10 mph16 km/h NorthwestDrizzle
7am65°F19°C10 mph16 km/h NorthwestMostly Cloudy
8am66°F19°C11 mph17 km/h NorthwestMostly Cloudy
9am67°F19°C11 mph18 km/h NorthwestMostly Cloudy
10am68°F20°C12 mph20 km/h NorthwestMostly Cloudy
11am68°F20°C12 mph20 km/h NorthwestPartly Cloudy
12pm68°F20°C12 mph19 km/h NorthwestPartly Cloudy
1pm67°F19°C11 mph18 km/h NorthwestMostly Cloudy
2pm65°F18°C10 mph16 km/h NorthwestCloudy
3pm63°F17°C8 mph12 km/h NorthwestCloudy
4pm61°F16°C5 mph9 km/h NorthwestCloudy
DateLowHighWindDayNight
August 156°F13°C68°F20°C10 mph16 km/h from NorthwestRainMostly Cloudy
August 255°F13°C73°F23°C11 mph17 km/h from WestMostly CloudyDrizzle
August 362°F17°C75°F24°C10 mph15 km/h from SouthwestMostly CloudyDrizzle
August 459°F15°C69°F21°C12 mph19 km/h from WestMostly ClearMostly Clear
August 554°F12°C72°F22°C4 mph7 km/h from WestPartly CloudyMostly Cloudy
August 656°F13°C74°F23°C5 mph9 km/h from SouthMostly CloudyMostly Cloudy
August 762°F17°C74°F23°C9 mph15 km/h from WestMostly CloudyPartly Cloudy

Yes

Low of 55°F13°C, High of 73°F23°C
Wind: 11 mph17 km/h
Precipitation: None

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