Yes

you do need a jacket based on the weather in 3990 Peer, Belgium 1 second ago

Why? Because it's not very warm out!
57°F14°C & Mostly Clear

Wind is 6 mph9 km/h from the Southwest, gusting to 14 mph22 km/h
June 1
8pm56°F13°C7 mph10 km/h WestMostly Clear
9pm55°F13°C7 mph11 km/h SouthwestPartly Cloudy
10pm54°F12°C7 mph12 km/h SouthwestPartly Cloudy
11pm53°F12°C7 mph12 km/h SouthwestPartly Cloudy
June 2
12am52°F11°C8 mph12 km/h SouthwestMostly Clear
1am53°F12°C8 mph13 km/h SouthwestMostly Clear
2am55°F13°C9 mph14 km/h SouthwestMostly Clear
3am58°F14°C9 mph15 km/h SouthwestPartly Cloudy
4am60°F16°C9 mph14 km/h WestMostly Cloudy
5am62°F17°C9 mph15 km/h WestMostly Cloudy
6am64°F18°C9 mph15 km/h WestMostly Cloudy
7am66°F19°C10 mph16 km/h WestMostly Cloudy
DateLowHighWindDayNight
June 152°F11°C67°F19°C9 mph15 km/h from WestPartly CloudyClear
June 250°F10°C75°F24°C12 mph20 km/h from SouthwestMostly CloudyMostly Cloudy
June 357°F14°C67°F20°C8 mph13 km/h from SouthwestDrizzleMostly Cloudy
June 455°F13°C69°F20°C12 mph19 km/h from SouthwestDrizzleRain
June 556°F13°C67°F19°C13 mph22 km/h from SouthwestDrizzleRain
June 652°F11°C63°F17°C14 mph22 km/h from SouthwestDrizzleDrizzle
June 751°F11°C64°F18°C12 mph20 km/h from WestDrizzlePartly Cloudy

Yes

Low of 50°F10°C, High of 74°F24°C
Wind: 12 mph20 km/h
Precipitation: None

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