Yes

you do need a jacket based on the weather in Downham Market PE38, UK 1 second ago

Why? Because just cool enough for a jacket, but not warm enough to ditch it and the wind makes walking forward feel like moonwalking in reverse!
54°F12°C & Windy

Wind is 18 mph29 km/h from the Southwest, gusting to 31 mph50 km/h
November 3
10am56°F13°C19 mph30 km/h SouthwestWindy
11am57°F14°C18 mph29 km/h SouthwestWindy
12pm58°F14°C18 mph29 km/h SouthwestWindy
1pm59°F15°C18 mph29 km/h SouthwestWindy
2pm59°F15°C18 mph30 km/h SouthwestWindy
3pm59°F15°C18 mph29 km/h SouthwestWindy
4pm59°F15°C18 mph28 km/h SouthwestWindy
5pm58°F15°C18 mph28 km/h SouthwestWindy
6pm57°F14°C17 mph28 km/h SouthwestWindy
7pm57°F14°C17 mph28 km/h SouthwestWindy
8pm57°F14°C18 mph28 km/h SouthwestWindy
9pm56°F13°C18 mph28 km/h SouthwestWindy
DateLowHighWindDayNight
November 343°F6°C59°F15°C18 mph28 km/h from SouthwestRainWindy
November 455°F13°C60°F15°C15 mph25 km/h from SouthWindyDrizzle
November 556°F13°C62°F17°C11 mph18 km/h from SouthCloudyCloudy
November 653°F11°C62°F16°C8 mph14 km/h from SouthCloudyMostly Cloudy
November 749°F9°C58°F14°C11 mph18 km/h from SouthMostly CloudyCloudy
November 846°F8°C58°F15°C6 mph9 km/h from SouthwestPartly CloudyPartly Cloudy
November 944°F6°C56°F13°C7 mph12 km/h from SouthMostly CloudyMostly Cloudy

Yes

Low of 55°F13°C, High of 60°F16°C
Wind: 15 mph25 km/h
Precipitation: None

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