Yes

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

Why? Because it's cold. simple as that.
48°F9°C & Mostly Cloudy

Wind is 12 mph19 km/h from the N, gusting to 24 mph39 km/h
April 23
11am49°F10°C12 mph20 km/h NMostly Cloudy
12pm49°F9°C12 mph19 km/h NMostly Cloudy
1pm48°F9°C11 mph17 km/h NMostly Cloudy
2pm48°F9°C9 mph15 km/h NMostly Cloudy
3pm47°F8°C7 mph11 km/h NMostly Cloudy
4pm45°F7°C5 mph9 km/h NMostly Cloudy
5pm44°F7°C5 mph9 km/h NMostly Cloudy
6pm44°F7°C6 mph10 km/h NMostly Cloudy
7pm43°F6°C7 mph11 km/h NCloudy
8pm42°F6°C8 mph12 km/h NCloudy
9pm42°F5°C8 mph13 km/h NMostly Cloudy
10pm41°F5°C8 mph13 km/h NPartly Cloudy
DateLowHighWindDayNight
April 2242°F5°C49°F10°C9 mph15 km/h from NMostly CloudyMostly Cloudy
April 2338°F4°C49°F9°C10 mph15 km/h from NMostly CloudyMostly Cloudy
April 2439°F4°C50°F10°C8 mph13 km/h from NWMostly CloudyMostly Cloudy
April 2536°F2°C49°F10°C7 mph11 km/h from ECloudyDrizzle
April 2641°F5°C55°F13°C10 mph17 km/h from NEDrizzleRain
April 2746°F8°C55°F13°C13 mph21 km/h from SWRainRain
April 2846°F8°C59°F15°C9 mph14 km/h from SRainPartly Cloudy

Yes

Low of 38°F4°C, High of 48°F9°C
Wind: 10 mph15 km/h
Precipitation: None

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