Yes

you do need a jacket based on the weather in Stockholm, Sweden 1 second ago

Why? Because it's cool. Pleasantly cool, but cool and it's so windy, even the squirrels are holding onto branches for dear life!
53°F12°C & Mostly Clear

Wind is 8 mph13 km/h from the Northwest, gusting to 21 mph34 km/h
August 24
6pm53°F12°C8 mph14 km/h NorthwestMostly Clear
7pm52°F11°C9 mph14 km/h NorthwestMostly Clear
8pm51°F11°C9 mph15 km/h NorthwestMostly Clear
9pm51°F10°C9 mph15 km/h NorthwestMostly Clear
10pm50°F10°C9 mph15 km/h NorthwestMostly Clear
11pm50°F10°C10 mph16 km/h NorthwestMostly Clear
August 25
12am50°F10°C10 mph16 km/h NorthwestMostly Clear
1am51°F11°C11 mph17 km/h NorthwestMostly Clear
2am52°F11°C11 mph18 km/h NorthwestPartly Cloudy
3am54°F12°C12 mph19 km/h NorthwestPartly Cloudy
4am56°F13°C13 mph21 km/h NorthMostly Cloudy
5am57°F14°C13 mph20 km/h NorthDrizzle
DateLowHighWindDayNight
August 2353°F12°C62°F17°C8 mph13 km/h from NorthwestMostly CloudyDrizzle
August 2450°F10°C61°F16°C11 mph18 km/h from NorthPartly CloudyMostly Cloudy
August 2550°F10°C62°F17°C6 mph9 km/h from NorthPartly CloudyMostly Clear
August 2649°F10°C65°F19°C6 mph9 km/h from SouthwestPartly CloudyPartly Cloudy
August 2754°F12°C69°F20°C5 mph8 km/h from SoutheastPartly CloudyRain
August 2858°F14°C65°F18°C10 mph16 km/h from EastRainRain
August 2959°F15°C66°F19°C7 mph12 km/h from SouthwestRainPartly Cloudy

Yes

Low of 50°F10°C, High of 61°F16°C
Wind: 11 mph18 km/h
Precipitation: 26% rain

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