Yes

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

Why? Because it's cool enough your breath is visible, but your nose isn’t red yet!
49°F9°C & Clear

Wind is 5 mph8 km/h from the East, gusting to 10 mph16 km/h
May 10
1am49°F10°C5 mph9 km/h EastClear
2am52°F11°C6 mph9 km/h EastClear
3am56°F13°C6 mph9 km/h EastClear
4am60°F16°C6 mph9 km/h EastClear
5am64°F18°C6 mph10 km/h EastClear
6am66°F19°C8 mph13 km/h EastClear
7am68°F20°C9 mph15 km/h EastClear
8am70°F21°C10 mph16 km/h EastClear
9am71°F22°C11 mph17 km/h EastClear
10am72°F22°C11 mph17 km/h EastClear
11am72°F22°C11 mph18 km/h EastClear
12pm71°F22°C11 mph18 km/h EastClear
DateLowHighWindDayNight
May 949°F9°C72°F22°C9 mph14 km/h from EastClearMostly Clear
May 1052°F11°C76°F25°C10 mph16 km/h from SoutheastClearClear
May 1156°F14°C76°F24°C10 mph16 km/h from EastClearMostly Clear
May 1256°F13°C75°F24°C7 mph12 km/h from EastMostly ClearClear
May 1355°F13°C74°F23°C9 mph14 km/h from NorthMostly ClearMostly Clear
May 1450°F10°C72°F22°C8 mph13 km/h from NorthMostly ClearClear
May 1550°F10°C74°F23°C8 mph14 km/h from NortheastMostly ClearClear

Yes

Low of 53°F12°C, High of 76°F25°C
Wind: 10 mph16 km/h
Precipitation: None

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