Yes

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

Why? Because a little drizzle out and just cool enough for a jacket, but not warm enough to ditch it!
50°F10°C & Drizzle

Wind is 9 mph14 km/h from the North, gusting to 17 mph27 km/h
September 22
3am51°F10°C8 mph13 km/h NorthRain
4am51°F11°C8 mph14 km/h NorthDrizzle
5am52°F11°C9 mph15 km/h NorthRain
6am53°F11°C9 mph15 km/h NorthRain
7am53°F12°C9 mph15 km/h NortheastRain
8am53°F12°C9 mph15 km/h NortheastRain
9am54°F12°C8 mph13 km/h NortheastRain
10am53°F12°C8 mph12 km/h NortheastDrizzle
11am53°F12°C8 mph12 km/h NortheastDrizzle
12pm53°F11°C7 mph12 km/h NortheastDrizzle
1pm52°F11°C6 mph10 km/h NortheastCloudy
2pm51°F11°C5 mph8 km/h NortheastCloudy
DateLowHighWindDayNight
September 2150°F10°C55°F13°C8 mph13 km/h from NortheastRainCloudy
September 2246°F8°C60°F16°C8 mph14 km/h from NortheastMostly ClearMostly Cloudy
September 2344°F6°C60°F16°C15 mph24 km/h from NortheastMostly CloudyDrizzle
September 2446°F8°C55°F13°C11 mph17 km/h from EastDrizzleMostly Cloudy
September 2546°F8°C62°F16°C9 mph14 km/h from EastMostly CloudyMostly Cloudy
September 2650°F10°C62°F17°C6 mph9 km/h from EastMostly CloudyPartly Cloudy
September 2749°F9°C64°F18°C6 mph10 km/h from EastPartly CloudyPartly Cloudy

Yes

Low of 46°F8°C, High of 60°F16°C
Wind: 8 mph14 km/h
Precipitation: None

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