Yes

you do need a jacket based on the weather in Konin, Poland 1 second ago

Why? Because it's pretty chilly!
55°F13°C & Mostly Cloudy

Wind is 1 mph2 km/h from the Southwest, gusting to 3 mph5 km/h
August 26
7pm53°F12°C2 mph3 km/h SouthwestMostly Cloudy
8pm52°F11°C2 mph3 km/h SoutheastMostly Cloudy
9pm51°F10°C2 mph3 km/h SoutheastPartly Cloudy
10pm50°F10°C2 mph3 km/h SoutheastMostly Cloudy
11pm49°F10°C3 mph5 km/h SoutheastMostly Cloudy
August 27
12am49°F10°C3 mph5 km/h SoutheastCloudy
1am52°F11°C4 mph6 km/h SoutheastCloudy
2am55°F13°C4 mph7 km/h SoutheastMostly Cloudy
3am59°F15°C5 mph8 km/h SoutheastMostly Cloudy
4am63°F17°C5 mph8 km/h SoutheastPartly Cloudy
5am66°F19°C5 mph9 km/h SoutheastPartly Cloudy
6am70°F21°C6 mph10 km/h SoutheastMostly Clear
DateLowHighWindDayNight
August 2649°F9°C76°F24°C6 mph9 km/h from SoutheastPartly CloudyPartly Cloudy
August 2758°F15°C86°F30°C11 mph18 km/h from SouthPartly CloudyMostly Cloudy
August 2866°F19°C77°F25°C8 mph12 km/h from SouthwestMostly CloudyThunderstorms
August 2961°F16°C71°F22°C7 mph12 km/h from WestDrizzleMostly Clear
August 3057°F14°C76°F24°C6 mph9 km/h from SouthwestMostly ClearPartly Cloudy
August 3161°F16°C73°F23°C5 mph8 km/h from SouthMostly CloudyDrizzle
September 159°F15°C68°F20°C9 mph15 km/h from NorthwestDrizzleDrizzle

Yes

Low of 58°F15°C, High of 86°F30°C
Wind: 11 mph18 km/h
Precipitation: None

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