Yes

you do need a jacket based on the weather in York, UK 14 minutes ago

Why? Because a jacket will keep you cozy, but you won't break a seat and the wind makes walking forward feel like moonwalking in reverse!
57°F14°C & Cloudy

Wind is 14 mph22 km/h from the South, gusting to 29 mph46 km/h
September 14
4pm57°F14°C14 mph22 km/h SouthDrizzle
5pm57°F14°C12 mph19 km/h SouthDrizzle
6pm58°F14°C11 mph18 km/h SouthwestMostly Clear
7pm57°F14°C12 mph19 km/h SouthwestPartly Cloudy
8pm56°F13°C12 mph20 km/h SouthwestPartly Cloudy
9pm55°F13°C13 mph21 km/h SouthwestMostly Cloudy
10pm55°F13°C15 mph23 km/h SouthwestPartly Cloudy
11pm54°F12°C15 mph24 km/h SouthwestCloudy
September 15
12am54°F12°C15 mph25 km/h SouthwestWindy
1am55°F13°C16 mph26 km/h SouthwestDrizzle
2am55°F13°C17 mph27 km/h SouthwestRain
3am55°F13°C18 mph29 km/h SouthwestDrizzle
DateLowHighWindDayNight
September 1347°F8°C60°F15°C11 mph18 km/h from SouthRainRain
September 1454°F12°C59°F15°C19 mph31 km/h from SouthwestRainDrizzle
September 1553°F11°C62°F17°C16 mph26 km/h from WestWindyRain
September 1652°F11°C67°F20°C12 mph19 km/h from SouthwestDrizzleCloudy
September 1756°F13°C68°F20°C13 mph21 km/h from SouthwestMostly CloudyMostly Cloudy
September 1856°F13°C71°F22°C10 mph15 km/h from SouthDrizzleRain
September 1955°F13°C67°F19°C10 mph16 km/h from SouthDrizzlePartly Cloudy

Yes

Low of 55°F13°C, High of 58°F15°C
Wind: 19 mph31 km/h
Precipitation: 81% rain

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