No

you don't need a jacket based on the weather in Keynsham, Bristol, UK 1 second ago

60°F16°C & Mostly Cloudy

Wind is 9 mph15 km/h from the Southwest, gusting to 17 mph28 km/h
June 9
6am61°F16°C10 mph16 km/h WestPartly Cloudy
7am63°F17°C10 mph17 km/h WestMostly Cloudy
8am64°F18°C11 mph18 km/h WestMostly Cloudy
9am64°F18°C12 mph19 km/h WestMostly Cloudy
10am65°F18°C12 mph19 km/h WestMostly Cloudy
11am65°F18°C11 mph18 km/h WestMostly Cloudy
12pm64°F18°C12 mph19 km/h WestCloudy
1pm62°F17°C11 mph18 km/h WestCloudy
2pm61°F16°C11 mph18 km/h WestCloudy
3pm60°F16°C10 mph15 km/h WestCloudy
4pm59°F15°C8 mph13 km/h WestCloudy
5pm58°F15°C9 mph14 km/h SouthwestCloudy
DateLowHighWindDayNight
June 853°F11°C65°F18°C10 mph16 km/h from WestMostly CloudyCloudy
June 956°F13°C67°F20°C11 mph18 km/h from WestMostly CloudyPartly Cloudy
June 1053°F12°C76°F24°C8 mph12 km/h from SoutheastPartly CloudyDrizzle
June 1159°F15°C71°F22°C12 mph19 km/h from SouthRainPartly Cloudy
June 1256°F13°C76°F24°C8 mph13 km/h from SoutheastMostly CloudyThunderstorms
June 1355°F13°C68°F20°C12 mph19 km/h from SouthwestDrizzlePartly Cloudy
June 1453°F12°C67°F19°C13 mph21 km/h from WestPartly CloudyPartly Cloudy

Yes

Low of 56°F14°C, High of 67°F20°C
Wind: 11 mph18 km/h
Precipitation: 24% rain

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