Yes

you do need a jacket based on the weather in Kettering, UK 6 seconds ago

Why? Because it's cool. Pleasantly cool, but cool!
58°F14°C & Mostly Clear

Wind is 10 mph16 km/h from the Southwest, gusting to 18 mph29 km/h
September 8
4am58°F14°C10 mph17 km/h SouthwestMostly Clear
5am60°F16°C11 mph18 km/h SouthwestMostly Clear
6am62°F17°C12 mph19 km/h SouthwestMostly Clear
7am64°F18°C12 mph20 km/h SouthwestMostly Clear
8am65°F19°C12 mph20 km/h SouthwestPartly Cloudy
9am67°F19°C12 mph19 km/h SouthwestMostly Clear
10am67°F20°C12 mph19 km/h SouthwestMostly Clear
11am68°F20°C12 mph19 km/h SouthwestMostly Clear
12pm67°F19°C11 mph17 km/h SouthwestPartly Cloudy
1pm66°F19°C9 mph14 km/h SouthwestMostly Clear
2pm64°F18°C7 mph11 km/h SouthwestMostly Clear
3pm61°F16°C5 mph9 km/h SouthwestMostly Clear
DateLowHighWindDayNight
September 754°F12°C68°F20°C11 mph17 km/h from SouthwestMostly ClearClear
September 849°F9°C67°F20°C9 mph14 km/h from SouthPartly CloudyMostly Cloudy
September 954°F12°C65°F18°C13 mph21 km/h from SouthDrizzleDrizzle
September 1052°F11°C63°F17°C16 mph26 km/h from SouthwestDrizzlePartly Cloudy
September 1149°F9°C63°F17°C14 mph23 km/h from SouthwestDrizzleDrizzle
September 1249°F10°C62°F17°C13 mph21 km/h from SouthwestDrizzleDrizzle
September 1351°F11°C67°F19°C16 mph27 km/h from SouthRainWindy

Yes

Low of 49°F10°C, High of 67°F20°C
Wind: 9 mph14 km/h
Precipitation: 11% rain

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