Thunderstorms and Rain Expected Across U.S. Cities
The U.S. forecast for September 20, 2026, indicates a mix of weather conditions across the country. Several cities, including Tampa, Toledo, Tulsa, and Washington, DC, are expected to experience afternoon thunderstorms. Rain and thunderstorms are also forecast for Wilmington, DE, and Philadelphia, PA. Meanwhile, cities like Tucson, AZ, and Portland, OR, are expected to see mostly sunny skies. Temperatures will vary widely, with highs ranging from 65°F (18°C) in Portland, ME, to 103°F (39°C) in Phoenix, AZ. Humidity levels will also differ significantly, with some areas experiencing high humidity, such as Wilmington, DE, at 95%, while others, like Tucson, AZ, will have much drier conditions at 24%.