Yes

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

Why? Because it's cool. Pleasantly cool, but cool.
58°F14°C & Cloudy

Wind is 3 mph5 km/h from the SE, gusting to 6 mph9 km/h
September 8
1am58°F14°C3 mph6 km/h SECloudy
2am58°F14°C4 mph6 km/h SERain
3am58°F15°C5 mph7 km/h SERain
4am60°F15°C5 mph8 km/h SRain
5am61°F16°C5 mph8 km/h SRain
6am63°F17°C5 mph8 km/h SWDrizzle
7am64°F18°C5 mph8 km/h SWMostly Cloudy
8am65°F19°C5 mph8 km/h SWCloudy
9am66°F19°C5 mph8 km/h SWCloudy
10am66°F19°C5 mph8 km/h SWRain
11am66°F19°C5 mph8 km/h SWRain
12pm65°F19°C5 mph8 km/h WDrizzle
DateLowHighWindDayNight
September 757°F14°C66°F19°C5 mph8 km/h from SWRainDrizzle
September 850°F10°C63°F17°C14 mph22 km/h from NWMostly CloudyMostly Cloudy
September 948°F9°C63°F17°C17 mph27 km/h from WDrizzleDrizzle
September 1045°F7°C56°F13°C14 mph23 km/h from WPartly CloudyMostly Clear
September 1142°F6°C58°F14°C11 mph17 km/h from NWPartly CloudyMostly Clear
September 1241°F5°C60°F16°C8 mph14 km/h from NMostly ClearPartly Cloudy
September 1343°F6°C64°F18°C8 mph12 km/h from NWPartly CloudyMostly Clear

Yes

Low of 50°F10°C, High of 63°F17°C
Wind: 14 mph22 km/h
Precipitation: None

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