Yes

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

Why? Because the air feels like the cozy middle ground between summer and winter!
56°F13°C & Mostly Clear

Wind is 7 mph12 km/h from the West, gusting to 14 mph22 km/h
September 13
3pm55°F13°C7 mph11 km/h SouthwestMostly Clear
4pm53°F12°C6 mph9 km/h SouthwestMostly Clear
5pm52°F11°C6 mph9 km/h WestMostly Clear
6pm51°F10°C5 mph9 km/h WestClear
7pm50°F10°C5 mph8 km/h WestClear
8pm49°F9°C5 mph8 km/h WestClear
9pm48°F9°C4 mph7 km/h SouthwestClear
10pm47°F9°C4 mph6 km/h SouthwestClear
11pm47°F8°C3 mph5 km/h SouthwestMostly Clear
September 14
12am46°F8°C3 mph5 km/h SouthwestPartly Cloudy
1am46°F8°C3 mph4 km/h SouthwestPartly Cloudy
2am46°F8°C2 mph4 km/h SouthMostly Cloudy
DateLowHighWindDayNight
September 1250°F10°C62°F16°C9 mph15 km/h from SouthwestRainMostly Clear
September 1345°F7°C64°F18°C11 mph17 km/h from SouthRainRain
September 1454°F12°C63°F17°C22 mph36 km/h from SouthwestWindyWindy
September 1551°F11°C63°F17°C14 mph23 km/h from WestMostly CloudyRain
September 1654°F12°C66°F19°C18 mph29 km/h from SouthwestRainCloudy
September 1756°F13°C66°F19°C14 mph22 km/h from SouthwestDrizzlePartly Cloudy
September 1851°F11°C66°F19°C8 mph12 km/h from SouthwestPartly CloudyPartly Cloudy

Yes

Low of 46°F8°C, High of 64°F18°C
Wind: 11 mph17 km/h
Precipitation: 67% rain

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