No

you don't need a jacket based on the weather in Washington, DC 20011, USA 1 second ago

76°F24°C & Mostly Clear

Wind is 6 mph10 km/h from the West, gusting to 15 mph24 km/h
August 26
1pm76°F25°C6 mph10 km/h WestMostly Clear
2pm77°F25°C7 mph11 km/h WestPartly Cloudy
3pm77°F25°C8 mph12 km/h WestMostly Cloudy
4pm77°F25°C8 mph13 km/h WestPartly Cloudy
5pm77°F25°C9 mph14 km/h WestPartly Cloudy
6pm76°F24°C7 mph12 km/h NorthwestPartly Cloudy
7pm73°F23°C5 mph8 km/h NorthwestMostly Cloudy
8pm72°F22°C4 mph6 km/h NorthwestMostly Cloudy
9pm70°F21°C5 mph9 km/h NorthwestPartly Cloudy
10pm68°F20°C6 mph10 km/h NorthwestPartly Cloudy
11pm67°F19°C6 mph10 km/h NorthwestPartly Cloudy
August 27
12am65°F18°C6 mph10 km/h NorthwestPartly Cloudy
DateLowHighWindDayNight
August 2660°F15°C77°F25°C6 mph9 km/h from NorthwestMostly ClearPartly Cloudy
August 2758°F15°C76°F24°C7 mph11 km/h from NorthwestMostly ClearPartly Cloudy
August 2858°F15°C78°F26°C5 mph8 km/h from SouthwestPartly CloudyPartly Cloudy
August 2962°F17°C79°F26°C6 mph10 km/h from WestMostly ClearMostly Clear
August 3058°F14°C76°F24°C5 mph9 km/h from NorthMostly ClearMostly Clear
August 3158°F14°C77°F25°C4 mph7 km/h from NortheastPartly CloudyPartly Cloudy
September 160°F15°C78°F25°C6 mph10 km/h from NortheastPartly CloudyMostly Clear

Yes

Low of 58°F15°C, High of 76°F25°C
Wind: 7 mph11 km/h
Precipitation: None

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