No

you don't need a jacket based on the weather in Norwich, UK 1 second ago

72°F22°C & Mostly Clear

Wind is 9 mph14 km/h from the E, gusting to 16 mph26 km/h
September 21
8am72°F22°C9 mph15 km/h EMostly Clear
9am73°F23°C9 mph15 km/h EMostly Clear
10am73°F23°C9 mph15 km/h EMostly Clear
11am72°F22°C9 mph15 km/h EClear
12pm70°F21°C9 mph14 km/h EMostly Clear
1pm67°F20°C8 mph13 km/h EMostly Clear
2pm64°F18°C6 mph10 km/h EMostly Clear
3pm62°F17°C6 mph10 km/h EMostly Clear
4pm61°F16°C6 mph10 km/h EMostly Clear
5pm60°F16°C6 mph9 km/h EPartly Cloudy
6pm60°F15°C5 mph9 km/h EMostly Cloudy
7pm59°F15°C5 mph7 km/h EMostly Cloudy
DateLowHighWindDayNight
September 2056°F14°C73°F23°C7 mph12 km/h from EMostly ClearMostly Cloudy
September 2158°F15°C70°F21°C9 mph14 km/h from ECloudyRain
September 2256°F13°C66°F19°C8 mph13 km/h from SWRainDrizzle
September 2353°F12°C62°F17°C7 mph12 km/h from NWMostly CloudyCloudy
September 2453°F11°C61°F16°C9 mph14 km/h from SWRainRain
September 2549°F10°C60°F15°C12 mph20 km/h from WRainRain
September 2644°F7°C53°F11°C14 mph23 km/h from NWRainMostly Clear

Yes

Low of 58°F15°C, High of 70°F21°C
Wind: 9 mph14 km/h
Precipitation: 54% rain

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