Yes

you do need a jacket based on the weather in Smithfield, RI, USA 1 second ago

Why? Because it's cool. Pleasantly cool, but cool!
57°F14°C & Mostly Cloudy

Wind is 2 mph3 km/h from the Southeast, gusting to 4 mph7 km/h
August 20
3am57°F14°C2 mph3 km/h SoutheastCloudy
4am56°F13°C2 mph3 km/h NorthCloudy
5am56°F13°C3 mph4 km/h NortheastCloudy
6am56°F13°C3 mph5 km/h NortheastCloudy
7am57°F14°C3 mph4 km/h NortheastCloudy
8am60°F15°C4 mph6 km/h NortheastCloudy
9am62°F17°C4 mph7 km/h NortheastCloudy
10am64°F18°C5 mph9 km/h EastCloudy
11am66°F19°C6 mph10 km/h EastCloudy
12pm67°F19°C7 mph12 km/h NortheastCloudy
1pm68°F20°C8 mph12 km/h NortheastCloudy
2pm66°F19°C7 mph12 km/h NortheastCloudy
DateLowHighWindDayNight
August 2056°F13°C68°F20°C7 mph11 km/h from NortheastRainRain
August 2158°F14°C69°F21°C11 mph17 km/h from NortheastDrizzlePartly Cloudy
August 2257°F14°C77°F25°C8 mph14 km/h from NorthMostly ClearClear
August 2360°F15°C81°F27°C6 mph10 km/h from SouthwestClearMostly Clear
August 2463°F17°C78°F25°C10 mph15 km/h from SouthMostly CloudyMostly Cloudy
August 2565°F18°C76°F24°C7 mph12 km/h from SouthDrizzleDrizzle
August 2661°F16°C74°F23°C8 mph13 km/h from WestMostly ClearClear

Yes

Low of 57°F14°C, High of 70°F21°C
Wind: 11 mph17 km/h
Precipitation: 39% rain

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