Yes

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

Why? Because the cold's there, but it's just a reminder, not an invasion!
48°F9°C & Partly Cloudy

Wind is 2 mph3 km/h from the East, gusting to 4 mph6 km/h
October 16
12am47°F8°C2 mph4 km/h EastMostly Cloudy
1am47°F8°C2 mph4 km/h EastMostly Cloudy
2am47°F8°C2 mph4 km/h EastMostly Cloudy
3am46°F8°C2 mph3 km/h EastMostly Cloudy
4am46°F8°C2 mph3 km/h EastMostly Cloudy
5am46°F8°C2 mph3 km/h EastMostly Cloudy
6am46°F8°C2 mph3 km/h EastMostly Cloudy
7am47°F8°C2 mph3 km/h EastMostly Cloudy
8am48°F9°C1 mph2 km/h EastMostly Cloudy
9am50°F10°C1 mph2 km/h SoutheastPartly Cloudy
10am52°F11°C1 mph2 km/h SouthwestPartly Cloudy
11am54°F12°C2 mph4 km/h SouthwestMostly Cloudy
DateLowHighWindDayNight
October 1546°F8°C56°F14°C2 mph3 km/h from SouthwestMostly CloudyMostly Cloudy
October 1646°F8°C57°F14°C2 mph3 km/h from SoutheastMostly CloudyMostly Cloudy
October 1745°F7°C56°F13°C8 mph13 km/h from SoutheastCloudyCloudy
October 1850°F10°C58°F14°C14 mph23 km/h from SoutheastRainRain
October 1950°F10°C55°F13°C8 mph12 km/h from SouthwestRainDrizzle
October 2049°F10°C55°F13°C7 mph12 km/h from WestDrizzleMostly Cloudy
October 2147°F8°C58°F14°C8 mph13 km/h from SouthDrizzleDrizzle

Yes

Low of 46°F8°C, High of 57°F14°C
Wind: 2 mph3 km/h
Precipitation: None

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