Yes

you do need a jacket based on the weather in Greenville, SC, USA 1 second ago

Why? Because it's bitterly cold.
41°F5°C & Clear

Wind is 4 mph7 km/h from the NW, gusting to 7 mph11 km/h
March 29
6am41°F5°C4 mph6 km/h NWClear
7am39°F4°C4 mph6 km/h NWClear
8am41°F5°C4 mph7 km/h WClear
9am47°F8°C4 mph6 km/h WClear
10am53°F12°C5 mph8 km/h WClear
11am59°F15°C7 mph11 km/h WClear
12pm63°F17°C7 mph12 km/h WClear
1pm66°F19°C8 mph14 km/h WClear
2pm68°F20°C9 mph14 km/h WClear
3pm70°F21°C9 mph14 km/h WClear
4pm72°F22°C9 mph14 km/h WClear
5pm72°F22°C8 mph14 km/h WClear
DateLowHighWindDayNight
March 2939°F4°C72°F22°C7 mph11 km/h from WClearMostly Clear
March 3045°F7°C75°F24°C11 mph18 km/h from SWMostly ClearMostly Clear
March 3151°F11°C79°F26°C9 mph14 km/h from SWPartly CloudyMostly Cloudy
April 160°F16°C79°F26°C11 mph18 km/h from SWMostly CloudyCloudy
April 263°F17°C78°F25°C13 mph22 km/h from SWMostly CloudyRain
April 345°F7°C66°F19°C16 mph25 km/h from WWindyClear
April 439°F4°C62°F17°C9 mph15 km/h from WMostly ClearClear

Yes

Low of 46°F8°C, High of 75°F24°C
Wind: 11 mph18 km/h
Precipitation: None

Support This Page