Yes

you do need a jacket based on the weather in Tønsberg, Norway 1 second ago

Why? Because a jacket will keep you cozy, but you won't break a seat and the wind is offering free, unsolicited face massages!
55°F13°C & Clear

Wind is 10 mph16 km/h from the Northwest, gusting to 21 mph33 km/h
September 22
7am55°F13°C10 mph17 km/h NorthwestClear
8am56°F13°C10 mph17 km/h NorthwestMostly Clear
9am57°F14°C10 mph15 km/h NorthwestPartly Cloudy
10am58°F14°C9 mph14 km/h NorthwestMostly Clear
11am57°F14°C7 mph12 km/h NorthwestClear
12pm56°F14°C6 mph10 km/h NorthwestClear
1pm54°F12°C5 mph9 km/h NorthwestClear
2pm52°F11°C6 mph10 km/h NorthwestMostly Clear
3pm50°F10°C6 mph10 km/h NorthwestMostly Clear
4pm49°F10°C7 mph12 km/h NorthwestMostly Clear
5pm49°F9°C8 mph13 km/h NorthwestClear
6pm48°F9°C8 mph13 km/h NorthwestClear
DateLowHighWindDayNight
September 2147°F8°C58°F14°C9 mph14 km/h from NorthwestMostly ClearClear
September 2244°F7°C57°F14°C5 mph9 km/h from NorthClearMostly Clear
September 2342°F5°C58°F15°C4 mph7 km/h from NorthwestClearMostly Clear
September 2445°F7°C61°F16°C9 mph14 km/h from SouthwestMostly CloudyMostly Clear
September 2545°F7°C60°F16°C6 mph9 km/h from SouthwestMostly ClearMostly Clear
September 2648°F9°C60°F15°C6 mph9 km/h from SoutheastMostly ClearPartly Cloudy
September 2748°F9°C59°F15°C7 mph12 km/h from SoutheastCloudyCloudy

Yes

Low of 44°F7°C, High of 57°F14°C
Wind: 5 mph9 km/h
Precipitation: None

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