Yes

you do need a jacket based on the weather in Bournemouth Airport, Parley Ln, Christchurch BH23 6SE, UK 1 second ago

Why? Because just cool enough for a jacket, but not warm enough to ditch it and it's fairly windy outside!
58°F14°C & Mostly Cloudy

Wind is 12 mph20 km/h from the West, gusting to 24 mph38 km/h
September 16
5am59°F15°C14 mph23 km/h WestMostly Cloudy
6am61°F16°C14 mph23 km/h WestMostly Cloudy
7am63°F17°C14 mph22 km/h WestMostly Cloudy
8am64°F18°C13 mph22 km/h WestMostly Cloudy
9am64°F18°C13 mph22 km/h WestCloudy
10am65°F18°C13 mph21 km/h WestCloudy
11am64°F18°C12 mph20 km/h WestCloudy
12pm63°F17°C12 mph20 km/h WestMostly Cloudy
1pm62°F17°C11 mph18 km/h WestCloudy
2pm61°F16°C10 mph16 km/h WestCloudy
3pm60°F15°C9 mph14 km/h WestCloudy
4pm59°F15°C8 mph12 km/h SouthwestCloudy
DateLowHighWindDayNight
September 1554°F12°C65°F18°C13 mph20 km/h from WestMostly CloudyRain
September 1656°F14°C66°F19°C17 mph28 km/h from SouthwestDrizzleCloudy
September 1762°F16°C68°F20°C14 mph23 km/h from SouthwestMostly CloudyMostly Cloudy
September 1859°F15°C70°F21°C8 mph12 km/h from SouthwestPartly CloudyMostly Cloudy
September 1958°F15°C68°F20°C8 mph13 km/h from SouthDrizzleThunderstorms
September 2052°F11°C61°F16°C12 mph20 km/h from NortheastThunderstormsDrizzle
September 2148°F9°C63°F17°C14 mph23 km/h from NortheastDrizzleMostly Cloudy

Yes

Low of 56°F14°C, High of 66°F19°C
Wind: 17 mph28 km/h
Precipitation: 67% rain

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