Yes

you do need a jacket based on the weather in Bielefeld, Germany 1 second ago

Why? Because sorry, it's too cool for just a hoodie and it's really really huffing out there!
56°F13°C & Windy

Wind is 18 mph29 km/h from the Southwest, gusting to 37 mph60 km/h
September 15
10pm55°F13°C18 mph29 km/h SouthwestWindy
11pm55°F13°C18 mph29 km/h SouthwestWindy
September 16
12am55°F13°C18 mph29 km/h SouthwestWindy
1am56°F13°C18 mph29 km/h SouthwestWindy
2am56°F13°C18 mph28 km/h SouthwestWindy
3am56°F14°C18 mph29 km/h SouthwestWindy
4am58°F14°C18 mph29 km/h SouthwestWindy
5am59°F15°C19 mph31 km/h SouthwestWindy
6am61°F16°C18 mph29 km/h SouthwestWindy
7am62°F17°C19 mph30 km/h WestWindy
8am63°F17°C18 mph29 km/h WestWindy
9am62°F17°C18 mph29 km/h WestWindy
DateLowHighWindDayNight
September 1553°F12°C63°F17°C18 mph28 km/h from SouthwestRainDrizzle
September 1651°F10°C63°F17°C11 mph18 km/h from SouthwestCloudyCloudy
September 1759°F15°C71°F21°C12 mph20 km/h from SouthwestPartly CloudyMostly Clear
September 1859°F15°C78°F26°C6 mph10 km/h from SouthwestMostly ClearPartly Cloudy
September 1956°F13°C81°F27°C6 mph10 km/h from SouthwestPartly CloudyMostly Cloudy
September 2059°F15°C76°F24°C6 mph10 km/h from SouthwestDrizzleDrizzle
September 2153°F12°C63°F17°C10 mph15 km/h from WestDrizzleMostly Cloudy

Yes

Low of 51°F11°C, High of 63°F17°C
Wind: 11 mph18 km/h
Precipitation: 24% rain

Support This Page