No

you don't need a jacket based on the weather in Calne SN11, UK 21 minutes ago

69°F21°C & Mostly Cloudy

Wind is 4 mph7 km/h from the W, gusting to 11 mph17 km/h
May 8
1pm69°F20°C4 mph7 km/h WMostly Cloudy
2pm67°F19°C4 mph6 km/h WMostly Cloudy
3pm64°F18°C3 mph5 km/h WMostly Cloudy
4pm60°F16°C4 mph6 km/h SWCloudy
5pm59°F15°C4 mph7 km/h SWCloudy
6pm57°F14°C4 mph7 km/h SWCloudy
7pm56°F13°C4 mph6 km/h SWCloudy
8pm54°F12°C4 mph6 km/h SWMostly Cloudy
9pm52°F11°C4 mph6 km/h SMostly Cloudy
10pm52°F11°C4 mph6 km/h SMostly Cloudy
11pm50°F10°C3 mph5 km/h SMostly Cloudy
May 9
12am49°F10°C3 mph5 km/h SMostly Cloudy
DateLowHighWindDayNight
May 745°F7°C70°F21°C4 mph7 km/h from SWPartly CloudyMostly Cloudy
May 849°F9°C72°F22°C3 mph5 km/h from WMostly CloudyMostly Cloudy
May 950°F10°C72°F22°C5 mph7 km/h from SEMostly CloudyPartly Cloudy
May 1050°F10°C73°F23°C8 mph12 km/h from SEPartly CloudyPartly Cloudy
May 1154°F12°C73°F23°C9 mph15 km/h from SEMostly CloudyMostly Cloudy
May 1253°F12°C65°F19°C11 mph19 km/h from SMostly CloudyDrizzle
May 1351°F10°C62°F17°C12 mph19 km/h from SEMostly CloudyMostly Cloudy

Yes

Low of 49°F10°C, High of 72°F22°C
Wind: 3 mph5 km/h
Precipitation: 3% rain

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