Yes

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

Why? Because it's quite chilly!
42°F6°C & Clear

Wind is 9 mph14 km/h from the North, gusting to 14 mph23 km/h
September 22
1am42°F5°C9 mph14 km/h NorthClear
2am42°F5°C8 mph14 km/h NorthClear
3am42°F6°C8 mph13 km/h NorthClear
4am45°F7°C8 mph13 km/h NorthClear
5am49°F9°C8 mph13 km/h NorthClear
6am53°F11°C9 mph14 km/h NorthClear
7am55°F13°C9 mph14 km/h NorthClear
8am57°F14°C8 mph13 km/h NorthClear
9am58°F15°C7 mph11 km/h NorthClear
10am59°F15°C6 mph9 km/h NorthMostly Clear
11am59°F15°C5 mph8 km/h NorthMostly Clear
12pm59°F15°C4 mph7 km/h NorthMostly Clear
DateLowHighWindDayNight
September 2142°F5°C59°F15°C7 mph11 km/h from NorthMostly ClearMostly Clear
September 2242°F5°C59°F15°C5 mph8 km/h from EastPartly CloudyMostly Cloudy
September 2346°F8°C60°F16°C5 mph8 km/h from SouthMostly CloudyPartly Cloudy
September 2448°F9°C61°F16°C8 mph12 km/h from SoutheastPartly CloudyPartly Cloudy
September 2552°F11°C59°F15°C16 mph26 km/h from SouthWindyRain
September 2651°F10°C57°F14°C18 mph28 km/h from WestRainDrizzle
September 2749°F9°C60°F16°C14 mph22 km/h from NorthwestDrizzlePartly Cloudy

Yes

Low of 42°F6°C, High of 59°F15°C
Wind: 5 mph8 km/h
Precipitation: None

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