Yes

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

Why? Because it's not very warm out!
57°F14°C & Clear

Wind is 5 mph8 km/h from the East, gusting to 9 mph15 km/h
May 17
3pm56°F14°C5 mph8 km/h EastClear
4pm54°F12°C4 mph6 km/h EastClear
5pm52°F11°C3 mph5 km/h NortheastClear
6pm50°F10°C3 mph5 km/h NorthClear
7pm49°F10°C4 mph6 km/h NorthClear
8pm49°F9°C3 mph6 km/h NorthwestClear
9pm48°F9°C5 mph7 km/h NorthClear
10pm47°F9°C6 mph10 km/h NorthwestMostly Clear
11pm48°F9°C8 mph12 km/h NorthPartly Cloudy
May 18
12am48°F9°C8 mph13 km/h NorthCloudy
1am49°F9°C8 mph14 km/h NorthCloudy
2am50°F10°C9 mph14 km/h NorthCloudy
DateLowHighWindDayNight
May 1649°F10°C61°F16°C8 mph12 km/h from NortheastMostly ClearMostly Clear
May 1747°F9°C60°F16°C9 mph15 km/h from NortheastPartly CloudyMostly Clear
May 1849°F9°C63°F17°C14 mph23 km/h from NortheastMostly ClearMostly Clear
May 1951°F10°C65°F18°C13 mph21 km/h from NortheastMostly ClearPartly Cloudy
May 2049°F9°C64°F18°C9 mph14 km/h from NorthPartly CloudyPartly Cloudy
May 2148°F9°C61°F16°C9 mph15 km/h from NortheastPartly CloudyPartly Cloudy
May 2250°F10°C62°F17°C8 mph14 km/h from SouthPartly CloudyCloudy

Yes

Low of 47°F9°C, High of 60°F16°C
Wind: 9 mph15 km/h
Precipitation: None

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