Yes

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

Why? Because the wind is harsh and biting!
66°F19°C & Mostly Cloudy

Wind is 10 mph16 km/h from the Southeast, gusting to 19 mph31 km/h
June 19
10pm66°F19°C10 mph17 km/h SoutheastMostly Cloudy
11pm65°F18°C11 mph17 km/h SoutheastPartly Cloudy
June 20
12am64°F18°C11 mph17 km/h SoutheastMostly Cloudy
1am64°F18°C11 mph17 km/h SoutheastCloudy
2am65°F18°C11 mph18 km/h SoutheastCloudy
3am67°F19°C10 mph16 km/h SoutheastCloudy
4am69°F21°C11 mph17 km/h SoutheastCloudy
5am72°F22°C11 mph18 km/h SoutheastCloudy
6am74°F23°C11 mph18 km/h SoutheastCloudy
7am76°F24°C11 mph17 km/h SoutheastCloudy
8am78°F25°C11 mph18 km/h SoutheastCloudy
9am79°F26°C11 mph17 km/h SoutheastMostly Cloudy
DateLowHighWindDayNight
June 1964°F18°C81°F27°C10 mph17 km/h from SoutheastMostly CloudyMostly Clear
June 2062°F17°C74°F23°C9 mph15 km/h from SoutheastMostly CloudyRain
June 2156°F13°C66°F19°C15 mph23 km/h from SouthwestDrizzleDrizzle
June 2254°F12°C62°F17°C21 mph34 km/h from WestWindyDrizzle
June 2358°F14°C67°F20°C15 mph24 km/h from WestDrizzleMostly Cloudy
June 2458°F15°C69°F21°C10 mph16 km/h from SouthwestMostly CloudyMostly Cloudy
June 2556°F14°C68°F20°C12 mph19 km/h from SouthwestPartly CloudyPartly Cloudy

No

Low of 62°F17°C, High of 74°F24°C
Wind: 9 mph15 km/h
Precipitation: 26% rain

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