Yes

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

Why? Because the air feels like the cozy middle ground between summer and winter!
52°F11°C & Cloudy

Wind is 7 mph11 km/h from the South, gusting to 14 mph22 km/h
September 28
1am52°F11°C7 mph11 km/h SouthRain
2am53°F11°C7 mph11 km/h SouthDrizzle
3am53°F12°C6 mph10 km/h SouthDrizzle
4am54°F12°C6 mph9 km/h SouthwestDrizzle
5am55°F13°C6 mph9 km/h SouthwestDrizzle
6am57°F14°C6 mph10 km/h WestMostly Cloudy
7am59°F15°C6 mph10 km/h NorthwestMostly Cloudy
8am61°F16°C6 mph10 km/h NorthwestPartly Cloudy
9am62°F17°C6 mph10 km/h NorthwestPartly Cloudy
10am63°F17°C6 mph10 km/h NorthwestMostly Clear
11am63°F17°C6 mph9 km/h NorthwestMostly Clear
12pm62°F17°C6 mph9 km/h NorthMostly Clear
DateLowHighWindDayNight
September 2747°F8°C63°F17°C6 mph9 km/h from NorthwestDrizzleClear
September 2842°F6°C62°F17°C2 mph4 km/h from NorthwestPartly CloudyMostly Cloudy
September 2944°F7°C65°F18°C3 mph5 km/h from SouthwestPartly CloudyMostly Cloudy
September 3047°F8°C64°F18°C5 mph8 km/h from SouthMostly CloudyMostly Cloudy
October 147°F8°C64°F18°C9 mph15 km/h from SouthMostly CloudyDrizzle
October 252°F11°C63°F17°C13 mph20 km/h from SouthRainRain
October 351°F10°C62°F16°C18 mph29 km/h from SouthwestDrizzleDrizzle

Yes

Low of 42°F6°C, High of 63°F17°C
Wind: 2 mph4 km/h
Precipitation: None

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