Yes

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

Why? Because sorry, it's too cool for just a hoodie and it's super windy outside!
58°F15°C & Mostly Clear

Wind is 14 mph23 km/h from the West, gusting to 27 mph43 km/h
September 16
5am59°F15°C15 mph24 km/h WestMostly Clear
6am61°F16°C15 mph25 km/h WestWindy
7am62°F17°C15 mph24 km/h WestWindy
8am63°F17°C15 mph24 km/h WestCloudy
9am64°F18°C15 mph24 km/h WestCloudy
10am65°F18°C14 mph23 km/h WestCloudy
11am64°F18°C14 mph23 km/h WestMostly Cloudy
12pm63°F17°C13 mph21 km/h WestCloudy
1pm61°F16°C11 mph18 km/h WestCloudy
2pm60°F15°C10 mph16 km/h WestCloudy
3pm58°F14°C8 mph14 km/h WestCloudy
4pm56°F14°C7 mph12 km/h WestCloudy
DateLowHighWindDayNight
September 1552°F11°C65°F18°C13 mph21 km/h from WestMostly CloudyDrizzle
September 1654°F12°C66°F19°C16 mph25 km/h from SouthwestDrizzleCloudy
September 1761°F16°C71°F22°C15 mph24 km/h from SouthwestMostly CloudyMostly Cloudy
September 1858°F15°C75°F24°C8 mph13 km/h from SouthPartly CloudyPartly Cloudy
September 1957°F14°C69°F20°C7 mph11 km/h from SouthwestDrizzleRain
September 2051°F11°C60°F16°C10 mph16 km/h from NortheastRainDrizzle
September 2149°F9°C61°F16°C16 mph26 km/h from NortheastDrizzleCloudy

Yes

Low of 54°F12°C, High of 66°F19°C
Wind: 16 mph25 km/h
Precipitation: 84% rain

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