Yes

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

Why? Because just cool enough for a jacket, but not warm enough to ditch it!
53°F12°C & Mostly Cloudy

Wind is 2 mph3 km/h from the Southwest, gusting to 5 mph8 km/h
October 13
9am53°F12°C2 mph3 km/h SouthwestMostly Cloudy
10am55°F13°C3 mph4 km/h SouthMostly Cloudy
11am58°F14°C3 mph6 km/h SouthPartly Cloudy
12pm60°F15°C4 mph6 km/h SouthPartly Cloudy
1pm61°F16°C4 mph7 km/h SouthMostly Cloudy
2pm62°F17°C4 mph6 km/h SouthMostly Cloudy
3pm62°F17°C4 mph6 km/h SouthMostly Cloudy
4pm61°F16°C4 mph6 km/h SouthMostly Cloudy
5pm59°F15°C4 mph6 km/h SoutheastPartly Cloudy
6pm57°F14°C3 mph5 km/h SouthPartly Cloudy
7pm55°F13°C3 mph5 km/h SouthMostly Cloudy
8pm55°F13°C3 mph4 km/h SouthMostly Cloudy
DateLowHighWindDayNight
October 1251°F11°C62°F17°C3 mph5 km/h from SouthMostly CloudyMostly Cloudy
October 1348°F9°C57°F14°C5 mph8 km/h from NorthMostly CloudyMostly Cloudy
October 1445°F7°C57°F14°C3 mph5 km/h from NortheastMostly CloudyPartly Cloudy
October 1540°F5°C57°F14°C2 mph4 km/h from NorthwestPartly CloudyMostly Cloudy
October 1643°F6°C54°F12°C3 mph4 km/h from EastMostly CloudyCloudy
October 1745°F7°C56°F13°C8 mph12 km/h from SouthCloudyCloudy
October 1847°F8°C55°F13°C12 mph19 km/h from SoutheastRainRain

Yes

Low of 48°F9°C, High of 57°F14°C
Wind: 5 mph8 km/h
Precipitation: None

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