USA Weather Today , September 20, 2026
🌦️ USA Weather Today Sunday, September 20, 2026 Today's national weather outlook covering heat, rain, thunderstorms, changing conditions and important weather safety information across the United States. 🌎 Weather Across America Today Weather conditions across the United States are expected to vary significantly today. Some regions will experience warm and sunny conditions, while other areas may see showers, thunderstorms and periods of heavier rain. The biggest weather contrasts are expected between the warmer Southern states and cooler areas farther north. Storm activity may also develop along weather boundaries as different air masses meet. If you are traveling today, check the forecast for your exact location before leaving because conditions can change quickly from one area to another. 🌡️ Today's National Weather Snapshot...