No

Why? Because you should be inside at home! #StayHome

But if you absolutely had to go out to get groceries, medication or other essential travel, No, you don't need a jacket.

Based on the weather in Allentown, PA, USA as of May 26, 2020 10:23pm local time.

Now

Clear
Temp: 71°F22°C
Wind: 5 MPH9 KPH
Precipitation: None

Today

Next 2 hours: No

Next 4 hours: No

Next 8 hours: No

Tomorrow

No

Overcast throughout the day.
Low of 60°F16°C, High of 78°F26°C
Wind: 5 MPH7 KPH
Precipitation: 9% rain