Yes

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

Why? Because it's bitterly cold.
49°F10°C & Drizzle

Wind is 16 mph26 km/h from the W, gusting to 27 mph43 km/h
May 3
1am49°F10°C17 mph27 km/h WWindy
2am50°F10°C16 mph26 km/h WWindy
3am51°F10°C16 mph26 km/h WWindy
4am52°F11°C17 mph27 km/h WWindy
5am53°F12°C17 mph27 km/h WWindy
6am55°F13°C17 mph27 km/h WWindy
7am57°F14°C17 mph27 km/h WWindy
8am58°F15°C17 mph28 km/h WWindy
9am59°F15°C18 mph28 km/h SWWindy
10am59°F15°C17 mph28 km/h SWWindy
11am58°F14°C17 mph28 km/h SWWindy
12pm57°F14°C17 mph27 km/h SWWindy
DateLowHighWindDayNight
May 249°F10°C59°F15°C17 mph27 km/h from SWWindyPartly Cloudy
May 347°F8°C59°F15°C6 mph10 km/h from SEMostly CloudyPartly Cloudy
May 447°F8°C59°F15°C8 mph13 km/h from SMostly CloudyDrizzle
May 548°F9°C59°F15°C8 mph12 km/h from WRainDrizzle
May 647°F9°C65°F18°C9 mph14 km/h from NPartly CloudyPartly Cloudy
May 748°F9°C62°F17°C6 mph10 km/h from EPartly CloudyMostly Cloudy
May 849°F9°C66°F19°C6 mph10 km/h from EMostly CloudyPartly Cloudy

Yes

Low of 47°F9°C, High of 59°F15°C
Wind: 6 mph10 km/h
Precipitation: 18% rain

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