Yes

you do need a jacket based on the weather in Brackley NN13, UK 1 second ago

Why? Because it's cool. Pleasantly cool, but cool!
52°F11°C & Clear

Wind is 6 mph9 km/h from the Northwest, gusting to 11 mph17 km/h
August 1
10pm51°F11°C6 mph10 km/h NorthwestClear
11pm50°F10°C6 mph10 km/h NorthwestClear
August 2
12am50°F10°C6 mph10 km/h NorthwestMostly Clear
1am50°F10°C6 mph10 km/h NorthwestMostly Clear
2am53°F11°C7 mph11 km/h NorthwestClear
3am56°F14°C8 mph13 km/h NorthwestMostly Clear
4am60°F15°C9 mph14 km/h NorthwestMostly Clear
5am63°F17°C9 mph14 km/h NorthwestMostly Clear
6am64°F18°C8 mph14 km/h NorthwestMostly Cloudy
7am65°F18°C8 mph13 km/h NorthwestMostly Cloudy
8am67°F19°C8 mph13 km/h NorthwestMostly Cloudy
9am68°F20°C8 mph12 km/h NorthwestMostly Cloudy
DateLowHighWindDayNight
August 150°F10°C71°F21°C8 mph13 km/h from NorthwestPartly CloudyPartly Cloudy
August 254°F12°C73°F23°C12 mph19 km/h from WestDrizzleMostly Cloudy
August 357°F14°C72°F22°C17 mph28 km/h from SouthwestDrizzleMostly Clear
August 452°F11°C69°F21°C15 mph24 km/h from NorthwestPartly CloudyMostly Clear
August 551°F11°C71°F22°C5 mph8 km/h from SouthwestMostly CloudyCloudy
August 656°F13°C73°F23°C12 mph20 km/h from SouthMostly CloudyPartly Cloudy
August 757°F14°C75°F24°C14 mph23 km/h from WestMostly ClearMostly Clear

Yes

Low of 54°F12°C, High of 73°F23°C
Wind: 12 mph19 km/h
Precipitation: 42% rain

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