Yes

you do need a jacket based on the weather in Leeuwarden, Netherlands 1 second ago

Why? Because it's cool. Pleasantly cool, but cool and it's so windy, your hat will probably launch into orbit!
59°F15°C & Windy

Wind is 16 mph26 km/h from the South, gusting to 29 mph47 km/h
November 4
1pm59°F15°C16 mph25 km/h SouthWindy
2pm59°F15°C14 mph23 km/h SouthCloudy
3pm58°F15°C13 mph21 km/h SouthCloudy
4pm58°F14°C12 mph20 km/h SouthCloudy
5pm57°F14°C12 mph20 km/h SouthCloudy
6pm56°F13°C13 mph21 km/h SouthCloudy
7pm56°F13°C13 mph21 km/h SouthCloudy
8pm55°F13°C13 mph21 km/h SouthCloudy
9pm55°F13°C13 mph21 km/h SouthCloudy
10pm55°F13°C13 mph20 km/h SouthCloudy
11pm55°F13°C13 mph21 km/h SouthMostly Cloudy
November 5
12am54°F12°C13 mph20 km/h SouthMostly Cloudy
DateLowHighWindDayNight
November 354°F12°C59°F15°C14 mph23 km/h from SouthCloudyMostly Cloudy
November 452°F11°C60°F16°C11 mph18 km/h from SouthMostly CloudyMostly Cloudy
November 547°F9°C57°F14°C7 mph12 km/h from SoutheastCloudyMostly Cloudy
November 646°F8°C57°F14°C5 mph8 km/h from SouthMostly CloudyMostly Cloudy
November 748°F9°C56°F14°C2 mph4 km/h from WestPartly CloudyPartly Cloudy
November 847°F8°C55°F13°C3 mph5 km/h from WestPartly CloudyMostly Cloudy
November 948°F9°C54°F12°C5 mph7 km/h from SouthCloudyDrizzle

Yes

Low of 52°F11°C, High of 60°F16°C
Wind: 11 mph18 km/h
Precipitation: None

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