Yes

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

Why? Because it's quite chilly.
41°F5°C & Mostly Cloudy

Wind is 6 mph9 km/h from the E, gusting to 9 mph14 km/h
April 26
10pm41°F5°C6 mph10 km/h EMostly Cloudy
11pm41°F5°C7 mph12 km/h EMostly Cloudy
April 27
12am41°F5°C8 mph13 km/h EMostly Cloudy
1am40°F5°C8 mph13 km/h EPartly Cloudy
2am42°F5°C9 mph15 km/h EMostly Cloudy
3am43°F6°C10 mph16 km/h EPartly Cloudy
4am44°F7°C11 mph17 km/h EPartly Cloudy
5am45°F7°C12 mph19 km/h EPartly Cloudy
6am47°F8°C12 mph19 km/h EPartly Cloudy
7am48°F9°C13 mph20 km/h EMostly Cloudy
8am49°F9°C13 mph21 km/h NEPartly Cloudy
9am49°F10°C13 mph21 km/h NEMostly Cloudy
DateLowHighWindDayNight
April 2640°F5°C50°F10°C12 mph20 km/h from NEMostly CloudyDrizzle
April 2743°F6°C51°F11°C11 mph18 km/h from NWDrizzlePartly Cloudy
April 2846°F8°C55°F13°C17 mph28 km/h from SDrizzleCloudy
April 2949°F10°C58°F14°C15 mph24 km/h from SECloudyMostly Cloudy
April 3049°F9°C55°F13°C5 mph8 km/h from NDrizzleDrizzle
May 149°F10°C55°F13°C7 mph11 km/h from WRainRain
May 249°F9°C60°F16°C8 mph13 km/h from NEPartly CloudyMostly Clear

Yes

Low of 43°F6°C, High of 51°F11°C
Wind: 11 mph18 km/h
Precipitation: 46% rain

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