Yes

you do need a jacket based on the weather in Old Windsor SL4, UK 1 second ago

Why? Because just cool enough for a jacket, but not warm enough to ditch it and the wind is harsh and biting!
59°F15°C & Cloudy

Wind is 13 mph21 km/h from the South, gusting to 25 mph40 km/h
November 4
3pm58°F15°C13 mph21 km/h SouthCloudy
4pm57°F14°C13 mph21 km/h SouthCloudy
5pm57°F14°C13 mph21 km/h SouthCloudy
6pm57°F14°C14 mph22 km/h SouthCloudy
7pm57°F14°C14 mph22 km/h SouthCloudy
8pm58°F14°C13 mph21 km/h SouthMostly Cloudy
9pm58°F14°C13 mph21 km/h SouthMostly Cloudy
10pm58°F15°C13 mph22 km/h SouthMostly Cloudy
11pm58°F14°C13 mph20 km/h SouthMostly Cloudy
November 5
12am58°F14°C12 mph20 km/h SouthMostly Cloudy
1am58°F14°C12 mph19 km/h SouthCloudy
2am58°F14°C12 mph19 km/h SouthCloudy
DateLowHighWindDayNight
November 456°F14°C59°F15°C11 mph17 km/h from SouthCloudyCloudy
November 556°F14°C62°F17°C11 mph17 km/h from SouthCloudyCloudy
November 654°F12°C62°F17°C6 mph10 km/h from SouthRainMostly Cloudy
November 752°F11°C59°F15°C7 mph11 km/h from SouthMostly CloudyMostly Cloudy
November 849°F9°C58°F15°C3 mph5 km/h from SoutheastPartly CloudyPartly Cloudy
November 945°F7°C55°F13°C3 mph5 km/h from SouthMostly CloudyMostly Cloudy
November 1046°F8°C54°F12°C6 mph9 km/h from SouthDrizzleMostly Cloudy

Yes

Low of 56°F14°C, High of 62°F17°C
Wind: 11 mph17 km/h
Precipitation: None

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