Yes

you do need a jacket based on the weather in Ellington, CT, USA 1 second ago

Why? Because it's not very warm out and it's windy enough to give you a brand new hairdo!
53°F12°C & Cloudy

Wind is 11 mph17 km/h from the South, gusting to 22 mph36 km/h
March 20
5pm52°F11°C11 mph17 km/h SouthCloudy
6pm49°F10°C11 mph18 km/h SoutheastCloudy
7pm47°F8°C10 mph16 km/h SoutheastCloudy
8pm46°F8°C9 mph14 km/h SoutheastCloudy
9pm46°F8°C8 mph12 km/h SoutheastHaze
10pm45°F7°C7 mph12 km/h SoutheastHaze
11pm46°F8°C7 mph11 km/h SoutheastDrizzle
March 21
12am45°F7°C5 mph8 km/h SoutheastDrizzle
1am45°F7°C6 mph9 km/h SoutheastDrizzle
2am46°F8°C4 mph6 km/h EastRain
3am46°F8°C3 mph6 km/h NortheastRain
4am46°F8°C6 mph10 km/h NorthwestRain
DateLowHighWindDayNight
March 2042°F6°C61°F16°C6 mph10 km/h from SouthCloudyRain
March 2136°F2°C48°F9°C15 mph24 km/h from NorthwestDrizzleClear
March 2232°F0°C56°F13°C10 mph16 km/h from SouthwestMostly CloudyDrizzle
March 2325°F-4°C43°F6°C8 mph13 km/h from NorthwestMostly ClearDrizzle
March 2435°F1°C48°F9°C8 mph12 km/h from SouthRainDrizzle
March 2535°F2°C49°F10°C8 mph13 km/h from WestMostly CloudyMostly Cloudy
March 2633°F0°C46°F8°C7 mph11 km/h from NorthwestDrizzlePartly Cloudy

Yes

Low of 36°F2°C, High of 47°F9°C
Wind: 15 mph24 km/h
Precipitation: 48% rain

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