Yes

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

Why? Because it's not very warm out!
51°F11°C & Cloudy

Wind is 7 mph11 km/h from the West, gusting to 13 mph21 km/h
October 29
4pm51°F11°C7 mph12 km/h WestCloudy
5pm50°F10°C8 mph13 km/h WestCloudy
6pm49°F9°C8 mph13 km/h WestPartly Cloudy
7pm48°F9°C9 mph14 km/h WestClear
8pm46°F8°C9 mph14 km/h WestClear
9pm45°F7°C9 mph15 km/h WestClear
10pm45°F7°C11 mph18 km/h WestClear
11pm45°F7°C12 mph19 km/h WestClear
October 30
12am45°F7°C12 mph19 km/h WestClear
1am45°F7°C12 mph19 km/h WestClear
2am45°F7°C12 mph19 km/h WestClear
3am44°F7°C11 mph18 km/h WestClear
DateLowHighWindDayNight
October 2945°F7°C51°F11°C6 mph9 km/h from WestDrizzleClear
October 3041°F5°C54°F12°C10 mph16 km/h from SouthMostly CloudyDrizzle
October 3153°F11°C60°F15°C16 mph26 km/h from SouthDrizzleRain
November 145°F7°C56°F13°C14 mph23 km/h from SouthwestPartly CloudyPartly Cloudy
November 243°F6°C54°F12°C12 mph20 km/h from SouthwestMostly ClearMostly Cloudy
November 347°F8°C59°F15°C20 mph32 km/h from SouthwestWindyWindy
November 453°F12°C59°F15°C17 mph27 km/h from SouthWindyDrizzle

Yes

Low of 42°F6°C, High of 54°F12°C
Wind: 10 mph16 km/h
Precipitation: None

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