Yes

you do need a jacket based on the weather in Inari (Ivalo), , Finland 1 second ago

Why? Because rain's coming down and it's cold enough that makes you wish you had a hat, but you're still too proud to admit it and it's so windy, your hat is now someone else's problem, two cities away!
47°F9°C & Rain

Wind is 15 mph24 km/h from the North, gusting to 30 mph49 km/h
August 19
5am48°F9°C15 mph24 km/h NorthDrizzle
6am49°F10°C16 mph25 km/h NorthDrizzle
7am49°F10°C16 mph25 km/h NorthDrizzle
8am49°F10°C16 mph26 km/h NorthDrizzle
9am49°F10°C16 mph25 km/h NorthWindy
10am49°F9°C16 mph25 km/h NorthWindy
11am48°F9°C15 mph24 km/h NorthCloudy
12pm47°F8°C15 mph24 km/h NorthCloudy
1pm46°F8°C14 mph22 km/h NorthCloudy
2pm45°F7°C12 mph20 km/h NorthMostly Cloudy
3pm44°F7°C11 mph18 km/h NorthwestMostly Cloudy
4pm44°F6°C11 mph17 km/h NorthwestCloudy
DateLowHighWindDayNight
August 1843°F6°C51°F11°C14 mph23 km/h from NorthRainDrizzle
August 1941°F5°C51°F11°C11 mph18 km/h from NorthDrizzleMostly Cloudy
August 2040°F4°C48°F9°C9 mph15 km/h from NorthwestDrizzleDrizzle
August 2142°F6°C48°F9°C9 mph14 km/h from WestDrizzleDrizzle
August 2243°F6°C52°F11°C5 mph7 km/h from WestDrizzleDrizzle
August 2343°F6°C54°F12°C5 mph8 km/h from NortheastDrizzleDrizzle
August 2445°F7°C55°F13°C7 mph11 km/h from NorthDrizzleDrizzle

Yes

Low of 41°F5°C, High of 52°F11°C
Wind: 11 mph18 km/h
Precipitation: 40% rain

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