Yes

you do need a jacket based on the weather in Princes St, Edinburgh, UK 1 second ago

Why? Because it's pretty chilly and it's on the windy side!
55°F13°C & Mostly Cloudy

Wind is 12 mph19 km/h from the Southeast, gusting to 22 mph36 km/h
September 27
6am55°F13°C12 mph20 km/h SouthMostly Cloudy
7am57°F14°C14 mph22 km/h SouthCloudy
8am58°F14°C14 mph23 km/h SouthCloudy
9am58°F15°C14 mph22 km/h SouthCloudy
10am58°F14°C13 mph21 km/h SouthCloudy
11am57°F14°C12 mph19 km/h SouthCloudy
12pm56°F14°C10 mph17 km/h SouthDrizzle
1pm55°F13°C9 mph15 km/h SouthRain
2pm54°F12°C8 mph13 km/h SoutheastRain
3pm53°F12°C9 mph14 km/h SoutheastRain
4pm52°F11°C9 mph15 km/h SoutheastDrizzle
5pm52°F11°C11 mph18 km/h SouthDrizzle
DateLowHighWindDayNight
September 2651°F10°C58°F15°C11 mph17 km/h from SouthRainRain
September 2746°F8°C58°F14°C8 mph13 km/h from WestMostly ClearMostly Clear
September 2841°F5°C58°F15°C5 mph8 km/h from SouthMostly CloudyCloudy
September 2951°F10°C63°F17°C8 mph14 km/h from SouthDrizzleDrizzle
September 3055°F13°C64°F18°C15 mph24 km/h from SouthwestDrizzleDrizzle
October 154°F12°C63°F17°C14 mph22 km/h from SouthwestDrizzleDrizzle
October 250°F10°C57°F14°C14 mph22 km/h from SouthwestDrizzleDrizzle

Yes

Low of 46°F8°C, High of 58°F15°C
Wind: 8 mph13 km/h
Precipitation: None

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