Yes

you do need a jacket based on the weather in Bristol, UK 1 second ago

Why? Because it's pretty chilly!
57°F14°C & Partly Cloudy

Wind is 6 mph9 km/h from the East, gusting to 12 mph20 km/h
October 17
8pm56°F14°C6 mph10 km/h EastMostly Cloudy
9pm56°F13°C6 mph10 km/h EastMostly Cloudy
10pm54°F12°C6 mph10 km/h SoutheastMostly Cloudy
11pm53°F12°C6 mph10 km/h SoutheastCloudy
October 18
12am53°F11°C6 mph10 km/h SoutheastCloudy
1am52°F11°C7 mph11 km/h EastCloudy
2am51°F11°C7 mph11 km/h SoutheastCloudy
3am51°F10°C7 mph12 km/h EastCloudy
4am51°F10°C7 mph12 km/h SoutheastCloudy
5am51°F11°C8 mph12 km/h SoutheastCloudy
6am52°F11°C8 mph12 km/h SoutheastCloudy
7am52°F11°C8 mph13 km/h SoutheastCloudy
DateLowHighWindDayNight
October 1653°F12°C60°F16°C3 mph5 km/h from EastMostly CloudyMostly Cloudy
October 1751°F10°C60°F15°C10 mph16 km/h from SoutheastCloudyDrizzle
October 1854°F12°C62°F17°C13 mph21 km/h from SouthRainMostly Cloudy
October 1954°F12°C59°F15°C10 mph16 km/h from SouthwestRainDrizzle
October 2051°F11°C58°F14°C12 mph19 km/h from WestDrizzlePartly Cloudy
October 2149°F9°C59°F15°C9 mph15 km/h from SouthDrizzleDrizzle
October 2251°F11°C57°F14°C23 mph36 km/h from SouthwestDrizzleDrizzle

Yes

Low of 51°F11°C, High of 60°F16°C
Wind: 10 mph16 km/h
Precipitation: None

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