Yes

you do need a jacket based on the weather in 21200 Raisio, Finland 1 second ago

Why? Because it's pretty chilly!
58°F14°C & Cloudy

Wind is 8 mph13 km/h from the South, gusting to 16 mph26 km/h
September 13
2am59°F15°C9 mph14 km/h SouthCloudy
3am59°F15°C9 mph15 km/h SouthDrizzle
4am60°F15°C9 mph15 km/h SouthPartly Cloudy
5am61°F16°C9 mph15 km/h SouthPartly Cloudy
6am62°F17°C9 mph15 km/h SouthPartly Cloudy
7am63°F17°C9 mph15 km/h SouthwestPartly Cloudy
8am64°F18°C10 mph15 km/h SouthwestPartly Cloudy
9am64°F18°C10 mph16 km/h SouthwestMostly Clear
10am64°F18°C9 mph15 km/h SouthwestMostly Clear
11am63°F17°C9 mph14 km/h SouthwestMostly Clear
12pm62°F17°C8 mph12 km/h SouthMostly Clear
1pm59°F15°C7 mph11 km/h SouthMostly Clear
DateLowHighWindDayNight
September 1256°F13°C64°F18°C9 mph14 km/h from SouthDrizzleMostly Cloudy
September 1354°F12°C65°F18°C7 mph11 km/h from SoutheastDrizzleRain
September 1457°F14°C63°F17°C14 mph23 km/h from SouthRainDrizzle
September 1556°F13°C62°F17°C13 mph21 km/h from SouthDrizzleRain
September 1653°F12°C60°F15°C11 mph18 km/h from SouthwestRainRain
September 1750°F10°C59°F15°C6 mph10 km/h from WestDrizzleDrizzle
September 1849°F9°C58°F14°C11 mph18 km/h from NorthwestPartly CloudyMostly Clear

Yes

Low of 55°F13°C, High of 65°F19°C
Wind: 7 mph11 km/h
Precipitation: 46% rain

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