Yes

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

Why? Because it's cool enough your breath is visible, but your nose isn’t red yet!
48°F9°C & Mostly Clear

Wind is 5 mph8 km/h from the South, gusting to 8 mph13 km/h
June 2
11pm48°F9°C6 mph9 km/h SouthMostly Clear
June 3
12am49°F9°C6 mph10 km/h SouthPartly Cloudy
1am50°F10°C7 mph12 km/h SouthPartly Cloudy
2am54°F12°C8 mph13 km/h SouthMostly Clear
3am58°F14°C10 mph17 km/h SouthClear
4am62°F16°C12 mph19 km/h SouthMostly Clear
5am64°F18°C13 mph21 km/h SouthPartly Cloudy
6am67°F19°C14 mph23 km/h SouthwestPartly Cloudy
7am69°F20°C15 mph24 km/h SouthwestMostly Cloudy
8am70°F21°C15 mph25 km/h SouthwestWindy
9am70°F21°C16 mph25 km/h SouthwestWindy
10am71°F22°C16 mph25 km/h SouthwestWindy
DateLowHighWindDayNight
June 248°F9°C71°F22°C13 mph21 km/h from SouthPartly CloudyMostly Cloudy
June 353°F12°C67°F19°C12 mph19 km/h from SouthwestDrizzlePartly Cloudy
June 451°F11°C65°F18°C13 mph20 km/h from SouthwestRainDrizzle
June 554°F12°C63°F17°C11 mph17 km/h from SouthwestRainRain
June 653°F12°C62°F17°C15 mph24 km/h from SouthwestRainRain
June 751°F11°C61°F16°C17 mph28 km/h from WestDrizzleDrizzle
June 849°F10°C60°F15°C15 mph24 km/h from WestDrizzlePartly Cloudy

Yes

Low of 54°F12°C, High of 67°F20°C
Wind: 12 mph19 km/h
Precipitation: 31% rain

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