Yes

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

Why? Because just cool enough for a jacket, but not warm enough to ditch it!
52°F11°C & Partly Cloudy

Wind is 5 mph8 km/h from the Northwest, gusting to 9 mph15 km/h
August 1
10pm52°F11°C5 mph8 km/h NorthwestPartly Cloudy
11pm51°F11°C5 mph7 km/h NorthwestPartly Cloudy
August 2
12am50°F10°C4 mph6 km/h NorthwestPartly Cloudy
1am51°F11°C4 mph7 km/h WestPartly Cloudy
2am53°F12°C5 mph8 km/h WestMostly Cloudy
3am55°F13°C5 mph9 km/h WestPartly Cloudy
4am57°F14°C6 mph10 km/h WestPartly Cloudy
5am59°F15°C7 mph11 km/h WestPartly Cloudy
6am61°F16°C7 mph12 km/h WestPartly Cloudy
7am62°F16°C7 mph12 km/h WestPartly Cloudy
8am63°F17°C8 mph12 km/h SouthwestPartly Cloudy
9am63°F17°C8 mph14 km/h SouthwestMostly Cloudy
DateLowHighWindDayNight
August 150°F10°C64°F18°C8 mph12 km/h from SouthwestPartly CloudyRain
August 256°F13°C65°F18°C15 mph24 km/h from WestDrizzleRain
August 354°F12°C63°F17°C28 mph44 km/h from SouthwestRainDrizzle
August 452°F11°C63°F17°C20 mph32 km/h from WestWindyPartly Cloudy
August 554°F12°C64°F18°C10 mph17 km/h from SouthwestMostly CloudyRain
August 653°F11°C64°F18°C12 mph19 km/h from SouthRainDrizzle
August 755°F13°C62°F17°C19 mph30 km/h from WestDrizzleDrizzle

Yes

Low of 56°F14°C, High of 64°F18°C
Wind: 15 mph24 km/h
Precipitation: 45% rain

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