Yes

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

Why? Because it's so windy, your hat will probably launch into orbit!
68°F20°C & Mostly Cloudy

Wind is 14 mph23 km/h from the West, gusting to 29 mph47 km/h
July 5
2pm67°F20°C14 mph22 km/h WestMostly Cloudy
3pm66°F19°C12 mph20 km/h WestMostly Cloudy
4pm65°F18°C12 mph19 km/h WestMostly Cloudy
5pm63°F17°C11 mph18 km/h WestCloudy
6pm61°F16°C10 mph17 km/h WestCloudy
7pm60°F16°C11 mph17 km/h WestDrizzle
8pm59°F15°C11 mph18 km/h WestDrizzle
9pm58°F14°C12 mph19 km/h WestDrizzle
10pm57°F14°C12 mph20 km/h WestCloudy
11pm56°F13°C12 mph20 km/h WestDrizzle
July 6
12am55°F13°C12 mph20 km/h WestCloudy
1am55°F13°C12 mph19 km/h WestCloudy
DateLowHighWindDayNight
July 460°F16°C70°F21°C13 mph20 km/h from WestMostly CloudyMostly Cloudy
July 555°F13°C67°F19°C12 mph20 km/h from NorthwestMostly CloudyMostly Cloudy
July 652°F11°C68°F20°C13 mph22 km/h from NorthwestPartly CloudyMostly Clear
July 751°F11°C70°F21°C7 mph11 km/h from WestMostly CloudyMostly Cloudy
July 856°F14°C74°F23°C7 mph12 km/h from WestPartly CloudyPartly Cloudy
July 958°F15°C75°F24°C6 mph9 km/h from SouthwestMostly CloudyMostly Cloudy
July 1061°F16°C73°F23°C9 mph14 km/h from SouthwestMostly CloudyDrizzle

Yes

Low of 55°F13°C, High of 66°F19°C
Wind: 12 mph20 km/h
Precipitation: 13% rain

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