Yes

you do need a jacket based on the weather in Lowell, MA, USA 1 second ago

Why? Because looks like it's raining and the cold's there, but it's just a reminder, not an invasion!
45°F7°C & Rain

Wind is 6 mph9 km/h from the North, gusting to 14 mph23 km/h
May 10
6am45°F7°C9 mph15 km/h NorthDrizzle
7am45°F7°C7 mph11 km/h NorthRain
8am46°F8°C6 mph10 km/h NorthRain
9am47°F8°C8 mph13 km/h NorthwestRain
10am49°F9°C7 mph11 km/h NorthwestRain
11am50°F10°C8 mph13 km/h NorthwestRain
12pm51°F11°C9 mph14 km/h NorthwestDrizzle
1pm54°F12°C10 mph16 km/h NorthwestDrizzle
2pm56°F13°C12 mph19 km/h NorthwestDrizzle
3pm58°F14°C13 mph20 km/h NorthwestMostly Cloudy
4pm61°F16°C13 mph21 km/h NorthwestMostly Cloudy
5pm62°F17°C13 mph21 km/h NorthwestPartly Cloudy
DateLowHighWindDayNight
May 1045°F7°C62°F17°C10 mph16 km/h from NorthwestRainClear
May 1147°F8°C66°F19°C11 mph18 km/h from NorthwestClearClear
May 1242°F6°C74°F23°C9 mph15 km/h from SouthwestMostly ClearPartly Cloudy
May 1353°F12°C69°F21°C7 mph11 km/h from EastMostly CloudyCloudy
May 1450°F10°C72°F22°C6 mph9 km/h from SoutheastCloudyDrizzle
May 1557°F14°C68°F20°C4 mph7 km/h from EastDrizzleCloudy
May 1660°F15°C79°F26°C4 mph7 km/h from SouthwestDrizzleCloudy

Yes

Low of 47°F9°C, High of 66°F19°C
Wind: 11 mph18 km/h
Precipitation: None

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