Yes

you do need a jacket based on the weather in Crosby, Liverpool L23, UK 1 second ago

Why? Because it's so windy, your hat will probably launch into orbit!
67°F20°C & Windy

Wind is 15 mph24 km/h from the Southwest, gusting to 26 mph42 km/h
September 17
10am67°F20°C15 mph24 km/h SouthwestWindy
11am67°F19°C15 mph24 km/h SouthwestWindy
12pm66°F19°C15 mph24 km/h SouthwestWindy
1pm65°F18°C15 mph24 km/h SouthwestMostly Clear
2pm63°F17°C14 mph23 km/h SouthwestPartly Cloudy
3pm62°F17°C14 mph23 km/h SouthwestPartly Cloudy
4pm61°F16°C14 mph23 km/h SouthwestMostly Clear
5pm61°F16°C14 mph23 km/h SouthwestMostly Clear
6pm60°F16°C14 mph22 km/h SouthwestMostly Clear
7pm60°F15°C13 mph22 km/h SouthwestMostly Clear
8pm59°F15°C13 mph21 km/h SouthwestPartly Cloudy
9pm59°F15°C12 mph20 km/h SouthwestMostly Clear
DateLowHighWindDayNight
September 1654°F12°C67°F20°C13 mph22 km/h from SouthwestRainMostly Clear
September 1757°F14°C68°F20°C12 mph20 km/h from SouthwestRainDrizzle
September 1860°F15°C67°F19°C10 mph16 km/h from SouthwestDrizzleRain
September 1952°F11°C62°F17°C11 mph18 km/h from NortheastRainRain
September 2048°F9°C56°F13°C14 mph23 km/h from NorthRainRain
September 2146°F8°C57°F14°C11 mph18 km/h from NortheastMostly ClearMostly Clear
September 2245°F7°C58°F14°C9 mph14 km/h from NortheastPartly CloudyMostly Cloudy

Yes

Low of 57°F14°C, High of 68°F20°C
Wind: 12 mph20 km/h
Precipitation: 61% rain

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