Yes

you do need a jacket based on the weather in Norman, OK, USA 1 second ago

Why? Because it's quite chilly.
33°F1°C & Mostly Clear

Wind is 3 mph5 km/h from the SW, gusting to 6 mph9 km/h
March 28
9am34°F1°C4 mph6 km/h SWMostly Clear
10am40°F5°C4 mph6 km/h SWClear
11am46°F8°C5 mph8 km/h SClear
12pm52°F11°C6 mph10 km/h SClear
1pm57°F14°C8 mph13 km/h SClear
2pm61°F16°C10 mph16 km/h SClear
3pm64°F18°C11 mph18 km/h SClear
4pm66°F19°C12 mph20 km/h SClear
5pm68°F20°C13 mph21 km/h SClear
6pm68°F20°C13 mph22 km/h SClear
7pm68°F20°C13 mph21 km/h SClear
8pm65°F19°C12 mph19 km/h SClear
DateLowHighWindDayNight
March 2832°F-0°C68°F20°C9 mph14 km/h from SClearMostly Clear
March 2953°F12°C72°F22°C20 mph32 km/h from SWindyWindy
March 3057°F14°C79°F26°C10 mph16 km/h from SWMostly CloudyCloudy
March 3164°F18°C78°F26°C14 mph23 km/h from SCloudyWindy
April 163°F17°C80°F27°C12 mph20 km/h from SWMostly CloudyMostly Cloudy
April 248°F9°C63°F17°C16 mph26 km/h from NWindyMostly Clear
April 342°F6°C68°F20°C6 mph10 km/h from NWClearClear

Yes

Low of 53°F12°C, High of 72°F22°C
Wind: 20 mph32 km/h
Precipitation: None

Support This Page