Yes

you do need a jacket based on the weather in The Old Schools, Trinity Ln, Cambridge CB2 1TN, UK 1 second ago

Why? Because it's not very warm out!
55°F13°C & Cloudy

Wind is 6 mph10 km/h from the Southeast, gusting to 13 mph21 km/h
November 7
8am55°F13°C8 mph12 km/h SoutheastCloudy
9am56°F13°C8 mph13 km/h SoutheastMostly Cloudy
10am57°F14°C10 mph17 km/h SoutheastMostly Cloudy
11am59°F15°C12 mph19 km/h SouthCloudy
12pm59°F15°C12 mph19 km/h SouthCloudy
1pm59°F15°C12 mph19 km/h SouthMostly Cloudy
2pm60°F15°C11 mph18 km/h SouthMostly Cloudy
3pm59°F15°C11 mph18 km/h SouthMostly Cloudy
4pm58°F14°C10 mph16 km/h SouthMostly Cloudy
5pm57°F14°C9 mph15 km/h SouthMostly Cloudy
6pm56°F13°C9 mph15 km/h SouthMostly Cloudy
7pm55°F13°C9 mph15 km/h SouthMostly Cloudy
DateLowHighWindDayNight
November 753°F11°C60°F15°C10 mph16 km/h from SouthMostly CloudyMostly Cloudy
November 846°F8°C56°F14°C7 mph11 km/h from WestMostly CloudyMostly Clear
November 943°F6°C56°F13°C9 mph14 km/h from SouthPartly CloudyDrizzle
November 1049°F10°C56°F13°C11 mph17 km/h from SouthDrizzleDrizzle
November 1147°F8°C56°F13°C10 mph17 km/h from SouthDrizzleCloudy
November 1250°F10°C56°F13°C14 mph22 km/h from SouthCloudyMostly Cloudy
November 1348°F9°C56°F13°C10 mph17 km/h from SouthCloudyRain

Yes

Low of 46°F8°C, High of 56°F14°C
Wind: 7 mph11 km/h
Precipitation: None

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