Yes

you do need a jacket based on the weather in Princes Risborough HP27, UK 1 second ago

Why? Because sorry, it's too cool for just a hoodie!
54°F12°C & Partly Cloudy

Wind is 7 mph12 km/h from the West, gusting to 15 mph24 km/h
June 9
3am55°F13°C7 mph12 km/h WestPartly Cloudy
4am58°F14°C7 mph12 km/h WestMostly Cloudy
5am60°F15°C8 mph13 km/h WestMostly Cloudy
6am61°F16°C9 mph14 km/h WestMostly Cloudy
7am63°F17°C10 mph15 km/h SouthwestMostly Cloudy
8am64°F18°C10 mph16 km/h SouthwestMostly Cloudy
9am64°F18°C11 mph17 km/h SouthwestCloudy
10am65°F18°C11 mph18 km/h WestCloudy
11am65°F18°C11 mph18 km/h WestCloudy
12pm65°F18°C11 mph18 km/h WestCloudy
1pm64°F18°C11 mph18 km/h WestCloudy
2pm63°F17°C10 mph16 km/h WestCloudy
DateLowHighWindDayNight
June 849°F9°C65°F18°C10 mph16 km/h from WestMostly CloudyCloudy
June 954°F12°C69°F20°C11 mph18 km/h from WestMostly CloudyPartly Cloudy
June 1053°F11°C75°F24°C9 mph15 km/h from SoutheastPartly CloudyMostly Cloudy
June 1158°F15°C73°F23°C12 mph19 km/h from SouthDrizzlePartly Cloudy
June 1255°F13°C79°F26°C8 mph13 km/h from SoutheastPartly CloudyDrizzle
June 1355°F13°C70°F21°C12 mph19 km/h from SouthwestPartly CloudyPartly Cloudy
June 1452°F11°C69°F21°C12 mph19 km/h from WestPartly CloudyMostly Clear

Yes

Low of 55°F13°C, High of 69°F21°C
Wind: 11 mph18 km/h
Precipitation: 9% rain

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