Yes

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

Why? Because too cold for just a hoodie, too warm for a parka!
44°F7°C & Mostly Cloudy

Wind is 6 mph10 km/h from the South, gusting to 14 mph22 km/h
November 4
2am44°F7°C6 mph10 km/h SouthCloudy
3am45°F7°C7 mph11 km/h SouthMostly Cloudy
4am44°F7°C7 mph12 km/h SouthMostly Cloudy
5am43°F6°C8 mph12 km/h SouthMostly Cloudy
6am43°F6°C8 mph13 km/h SouthMostly Cloudy
7am43°F6°C9 mph14 km/h SouthMostly Cloudy
8am44°F7°C10 mph16 km/h SouthMostly Cloudy
9am46°F8°C11 mph18 km/h SouthMostly Cloudy
10am48°F9°C12 mph20 km/h SouthCloudy
11am49°F10°C13 mph20 km/h SouthCloudy
12pm50°F10°C13 mph21 km/h SouthCloudy
1pm50°F10°C13 mph21 km/h SouthDrizzle
DateLowHighWindDayNight
November 343°F6°C52°F11°C12 mph19 km/h from SouthRainDrizzle
November 450°F10°C53°F12°C12 mph19 km/h from SouthwestRainRain
November 539°F4°C50°F10°C5 mph7 km/h from WestMostly CloudyCloudy
November 638°F4°C51°F10°C6 mph10 km/h from SouthDrizzleDrizzle
November 740°F5°C48°F9°C7 mph12 km/h from NorthwestMostly CloudyPartly Cloudy
November 837°F3°C44°F6°C3 mph5 km/h from NorthwestMostly CloudyMostly Cloudy
November 932°F0°C42°F5°C6 mph9 km/h from NorthPartly CloudyMostly Clear

Yes

Low of 50°F10°C, High of 54°F12°C
Wind: 12 mph19 km/h
Precipitation: 50% rain

Support This Page