Yes

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

Why? Because it's not very warm out and the wind could blow a wig clean off your head!
58°F15°C & Mostly Cloudy

Wind is 14 mph22 km/h from the West, gusting to 23 mph37 km/h
October 28
1pm58°F15°C14 mph23 km/h WestPartly Cloudy
2pm59°F15°C14 mph22 km/h WestPartly Cloudy
3pm58°F14°C13 mph20 km/h WestMostly Cloudy
4pm57°F14°C11 mph18 km/h SouthwestMostly Cloudy
5pm56°F14°C10 mph16 km/h SouthwestMostly Cloudy
6pm56°F13°C10 mph16 km/h SouthwestMostly Cloudy
7pm55°F13°C10 mph17 km/h SouthwestMostly Cloudy
8pm55°F13°C12 mph19 km/h SouthwestMostly Cloudy
9pm55°F13°C12 mph20 km/h SouthwestMostly Cloudy
10pm54°F12°C13 mph21 km/h SouthwestCloudy
11pm54°F12°C13 mph21 km/h SouthwestCloudy
October 29
12am54°F12°C13 mph20 km/h SouthwestCloudy
DateLowHighWindDayNight
October 2854°F12°C59°F15°C12 mph20 km/h from WestRainDrizzle
October 2947°F8°C55°F13°C9 mph14 km/h from WestDrizzlePartly Cloudy
October 3045°F7°C58°F14°C21 mph35 km/h from SouthRainRain
October 3154°F12°C59°F15°C20 mph32 km/h from SouthRainRain
November 148°F9°C55°F13°C15 mph24 km/h from WestDrizzleRain
November 247°F8°C54°F12°C14 mph23 km/h from WestDrizzleDrizzle
November 354°F12°C60°F15°C21 mph34 km/h from SouthwestWindyRain

Yes

Low of 47°F9°C, High of 55°F13°C
Wind: 9 mph14 km/h
Precipitation: 77% rain

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