Yes

you do need a jacket based on the weather in Clapham Common, Clapham, United Kingdom 1 second ago

Why? Because too cold for just a hoodie, too warm for a parka!
47°F9°C & Mostly Cloudy

Wind is 2 mph3 km/h from the South, gusting to 6 mph9 km/h
December 26
10am48°F9°C2 mph3 km/h SouthwestMostly Cloudy
11am47°F8°C2 mph3 km/h SouthwestMostly Cloudy
12pm46°F8°C1 mph2 km/h SouthwestMostly Cloudy
1pm46°F8°C1 mph2 km/h SouthwestMostly Cloudy
2pm45°F7°C1 mph1 km/h SouthMostly Cloudy
3pm45°F7°C1 mph2 km/h SouthMostly Cloudy
4pm45°F7°C1 mph2 km/h SouthwestMostly Cloudy
5pm44°F7°C1 mph1 km/h WestMostly Cloudy
6pm44°F7°C1 mph1 km/h NorthMostly Cloudy
7pm44°F6°C1 mph2 km/h SoutheastMostly Cloudy
8pm43°F6°C1 mph2 km/h SoutheastMostly Cloudy
9pm43°F6°C1 mph1 km/h SouthwestMostly Cloudy
DateLowHighWindDayNight
December 2543°F6°C48°F9°C2 mph3 km/h from SouthMostly CloudyMostly Cloudy
December 2643°F6°C47°F9°C1 mph2 km/h from NorthCloudyMostly Cloudy
December 2741°F5°C46°F8°C3 mph5 km/h from WestMostly CloudyMostly Cloudy
December 2839°F4°C49°F9°C6 mph9 km/h from SouthwestMostly CloudyMostly Cloudy
December 2943°F6°C50°F10°C9 mph15 km/h from SouthwestMostly CloudyCloudy
December 3045°F7°C53°F11°C16 mph25 km/h from SouthwestDrizzleRain
December 3135°F2°C47°F8°C9 mph15 km/h from NorthwestRainRain

Yes

Low of 43°F6°C, High of 47°F9°C
Wind: 1 mph2 km/h
Precipitation: None

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