Yes

you do need a jacket based on the weather in Mill Hill, London NW7, UK 1 second ago

Why? Because it's not very warm out and it's so windy, even the squirrels are holding onto branches for dear life!
56°F13°C & Cloudy

Wind is 12 mph19 km/h from the South, gusting to 25 mph40 km/h
November 4
8am56°F13°C12 mph20 km/h SouthCloudy
9am57°F14°C12 mph19 km/h SouthCloudy
10am58°F14°C13 mph20 km/h SouthCloudy
11am59°F15°C14 mph22 km/h SouthCloudy
12pm59°F15°C13 mph21 km/h SouthCloudy
1pm59°F15°C13 mph21 km/h SouthCloudy
2pm59°F15°C12 mph19 km/h SouthCloudy
3pm58°F15°C11 mph18 km/h SouthCloudy
4pm58°F14°C11 mph18 km/h SouthCloudy
5pm57°F14°C11 mph18 km/h SouthCloudy
6pm57°F14°C11 mph18 km/h SouthCloudy
7pm57°F14°C12 mph19 km/h SouthCloudy
DateLowHighWindDayNight
November 456°F13°C59°F15°C12 mph19 km/h from SouthCloudyMostly Cloudy
November 557°F14°C62°F17°C9 mph15 km/h from SouthMostly CloudyMostly Cloudy
November 655°F13°C63°F17°C7 mph12 km/h from SouthDrizzleMostly Cloudy
November 752°F11°C58°F14°C7 mph11 km/h from SouthMostly CloudyMostly Cloudy
November 848°F9°C58°F15°C4 mph7 km/h from SouthwestPartly CloudyMostly Cloudy
November 946°F8°C56°F13°C4 mph6 km/h from SouthwestMostly CloudyMostly Cloudy
November 1047°F8°C55°F13°C7 mph11 km/h from SouthCloudyCloudy

Yes

Low of 56°F14°C, High of 63°F17°C
Wind: 9 mph15 km/h
Precipitation: None

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