Yes

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

Why? Because the wind could blow a wig clean off your head!
67°F19°C & Cloudy

Wind is 10 mph16 km/h from the Southwest, gusting to 20 mph32 km/h
July 5
6pm66°F19°C10 mph17 km/h SouthwestCloudy
7pm64°F18°C10 mph16 km/h WestCloudy
8pm63°F17°C10 mph16 km/h WestMostly Cloudy
9pm61°F16°C10 mph16 km/h SouthwestPartly Cloudy
10pm60°F15°C9 mph15 km/h SouthwestCloudy
11pm59°F15°C9 mph14 km/h SouthwestCloudy
July 6
12am59°F15°C8 mph13 km/h SouthwestCloudy
1am59°F15°C7 mph12 km/h SouthwestCloudy
2am60°F16°C7 mph12 km/h SouthwestCloudy
3am62°F17°C7 mph12 km/h SouthwestCloudy
4am64°F18°C7 mph11 km/h WestCloudy
5am66°F19°C6 mph10 km/h SouthwestMostly Cloudy
DateLowHighWindDayNight
July 458°F14°C73°F23°C13 mph21 km/h from SouthwestMostly CloudyCloudy
July 556°F13°C68°F20°C7 mph12 km/h from NorthwestRainRain
July 654°F12°C66°F19°C14 mph23 km/h from NorthDrizzleDrizzle
July 752°F11°C68°F20°C12 mph19 km/h from NorthwestPartly CloudyMostly Clear
July 852°F11°C76°F24°C6 mph10 km/h from NorthwestMostly ClearMostly Clear
July 956°F14°C79°F26°C6 mph10 km/h from NorthMostly ClearClear
July 1058°F14°C81°F27°C5 mph8 km/h from EastMostly ClearMostly Clear

Yes

Low of 56°F14°C, High of 68°F20°C
Wind: 7 mph12 km/h
Precipitation: 76% rain

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