Yes

you do need a jacket based on the weather in Cork, Ireland 1 second ago

Why? Because this drizzle is just a polite way of saying, “Get ready, the big stuff's coming.” and it's cool. Pleasantly cool, but cool!
54°F12°C & Drizzle

Wind is 3 mph5 km/h from the Southwest, gusting to 5 mph8 km/h
May 20
7pm53°F12°C3 mph5 km/h WestDrizzle
8pm52°F11°C3 mph5 km/h NorthwestDrizzle
9pm50°F10°C3 mph5 km/h NorthwestMostly Clear
10pm49°F10°C4 mph6 km/h NorthwestMostly Clear
11pm48°F9°C4 mph7 km/h NorthwestMostly Clear
May 21
12am47°F9°C5 mph8 km/h NorthwestMostly Clear
1am48°F9°C5 mph8 km/h NorthwestPartly Cloudy
2am50°F10°C6 mph9 km/h NorthwestPartly Cloudy
3am54°F12°C8 mph13 km/h NorthwestPartly Cloudy
4am56°F14°C9 mph15 km/h NorthPartly Cloudy
5am59°F15°C9 mph14 km/h NorthPartly Cloudy
6am62°F17°C9 mph14 km/h NorthMostly Clear
DateLowHighWindDayNight
May 1952°F11°C62°F17°C7 mph11 km/h from SouthRainDrizzle
May 2047°F9°C70°F21°C8 mph12 km/h from NorthMostly ClearClear
May 2149°F9°C70°F21°C8 mph14 km/h from NorthwestPartly CloudyMostly Clear
May 2246°F8°C67°F20°C6 mph10 km/h from WestCloudyCloudy
May 2353°F12°C64°F18°C17 mph27 km/h from SouthwestDrizzlePartly Cloudy
May 2449°F9°C60°F16°C18 mph29 km/h from WestWindyPartly Cloudy
May 2548°F9°C60°F16°C17 mph27 km/h from SouthwestDrizzleMostly Cloudy

Yes

Low of 47°F9°C, High of 70°F21°C
Wind: 8 mph12 km/h
Precipitation: None

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