Yes

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

Why? Because light rain: when the sky can't decide if it’s serious or just messing with you and the cold's there, but it's just a reminder, not an invasion!
47°F8°C & Drizzle

Wind is 7 mph12 km/h from the Southwest, gusting to 15 mph24 km/h
June 4
1am47°F8°C8 mph13 km/h SouthwestPartly Cloudy
2am49°F9°C8 mph13 km/h SouthwestPartly Cloudy
3am51°F11°C9 mph15 km/h SouthwestPartly Cloudy
4am53°F12°C9 mph15 km/h SouthwestPartly Cloudy
5am55°F13°C11 mph17 km/h WestMostly Cloudy
6am57°F14°C12 mph20 km/h SouthwestMostly Cloudy
7am58°F15°C14 mph22 km/h WestMostly Cloudy
8am59°F15°C15 mph24 km/h WestMostly Cloudy
9am60°F16°C15 mph24 km/h WestWindy
10am61°F16°C15 mph24 km/h WestWindy
11am60°F16°C14 mph23 km/h WestMostly Cloudy
12pm61°F16°C13 mph22 km/h WestPartly Cloudy
DateLowHighWindDayNight
June 347°F8°C61°F16°C13 mph20 km/h from WestMostly CloudyDrizzle
June 449°F9°C60°F16°C14 mph22 km/h from SouthwestDrizzleDrizzle
June 547°F9°C61°F16°C14 mph23 km/h from WestDrizzleDrizzle
June 650°F10°C61°F16°C18 mph29 km/h from SouthwestRainMostly Clear
June 746°F8°C62°F16°C15 mph24 km/h from NorthwestWindyPartly Cloudy
June 846°F8°C64°F18°C13 mph20 km/h from SouthwestMostly CloudyMostly Cloudy
June 952°F11°C68°F20°C14 mph22 km/h from WestMostly CloudyPartly Cloudy

Yes

Low of 49°F10°C, High of 60°F16°C
Wind: 14 mph22 km/h
Precipitation: 78% rain

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