Yes

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

Why? Because it's so windy, your hat is now someone else's problem, two cities away!
66°F19°C & Windy

Wind is 17 mph27 km/h from the Southeast, gusting to 27 mph44 km/h
September 7
5am68°F20°C18 mph28 km/h SoutheastWindy
6am71°F22°C18 mph29 km/h SoutheastWindy
7am73°F23°C18 mph28 km/h SoutheastWindy
8am75°F24°C17 mph28 km/h SoutheastWindy
9am76°F24°C17 mph27 km/h SoutheastWindy
10am77°F25°C17 mph27 km/h SoutheastWindy
11am78°F25°C16 mph26 km/h SoutheastWindy
12pm77°F25°C15 mph24 km/h SoutheastWindy
1pm76°F24°C14 mph22 km/h SoutheastClear
2pm74°F23°C13 mph22 km/h SoutheastClear
3pm72°F22°C14 mph22 km/h SoutheastClear
4pm71°F22°C14 mph23 km/h SoutheastClear
DateLowHighWindDayNight
September 660°F15°C78°F25°C16 mph26 km/h from SoutheastWindyPartly Cloudy
September 761°F16°C72°F22°C9 mph14 km/h from WestRainMostly Cloudy
September 855°F13°C65°F18°C4 mph6 km/h from NortheastCloudyMostly Cloudy
September 954°F12°C66°F19°C6 mph9 km/h from SouthMostly CloudyMostly Clear
September 1056°F13°C66°F19°C15 mph25 km/h from SouthwestDrizzleDrizzle
September 1155°F13°C62°F17°C16 mph26 km/h from SouthwestDrizzleDrizzle
September 1254°F12°C63°F17°C14 mph22 km/h from SouthwestDrizzleDrizzle

No

Low of 61°F16°C, High of 72°F22°C
Wind: 9 mph14 km/h
Precipitation: 43% rain

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