Yes

you do need a jacket based on the weather in Winchester SO21, UK 1 second ago

Why? Because it's quite chilly and it's so windy, your hat has officially retired from your head!
47°F8°C & Partly Cloudy

Wind is 11 mph18 km/h from the Southeast, gusting to 23 mph37 km/h
November 29
1pm47°F8°C11 mph18 km/h SoutheastMostly Cloudy
2pm47°F9°C10 mph17 km/h SouthMostly Cloudy
3pm48°F9°C10 mph16 km/h SouthCloudy
4pm49°F9°C10 mph16 km/h SouthCloudy
5pm49°F9°C9 mph15 km/h SouthCloudy
6pm49°F10°C8 mph14 km/h SouthCloudy
7pm49°F10°C7 mph12 km/h SouthCloudy
8pm50°F10°C7 mph11 km/h SouthCloudy
9pm51°F10°C7 mph11 km/h SouthCloudy
10pm51°F11°C7 mph11 km/h SouthCloudy
11pm52°F11°C7 mph12 km/h SouthCloudy
November 30
12am52°F11°C8 mph12 km/h SouthCloudy
DateLowHighWindDayNight
November 2842°F5°C50°F10°C10 mph17 km/h from SoutheastMostly ClearCloudy
November 2949°F10°C57°F14°C9 mph15 km/h from SouthCloudyDrizzle
November 3050°F10°C57°F14°C12 mph20 km/h from SouthwestDrizzlePartly Cloudy
December 138°F4°C50°F10°C12 mph19 km/h from NorthwestPartly CloudyPartly Cloudy
December 234°F1°C46°F8°C6 mph9 km/h from SoutheastRainDrizzle
December 339°F4°C47°F8°C7 mph11 km/h from WestPartly CloudyMostly Cloudy
December 440°F4°C55°F13°C15 mph24 km/h from SouthRainRain

Yes

Low of 49°F10°C, High of 57°F14°C
Wind: 9 mph15 km/h
Precipitation: None

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