The Old Farmer’s Almanac has issued its NOAA US temperature forecasts September outlook for the United States, giving regions a month-ahead read on whether conditions lean warmer, cooler, wetter, or drier than average. The guide points to 59 degrees in one region and 80 degrees in Florida, with several areas running below normal.
The Almanac says its long-range forecasts combine solar science, climatology, and meteorology, comparing solar patterns and historical weather conditions with current solar activity while also weighing climate data and large-scale signals such as El Niño and La Niña. It divides the country into zones and tracks temperatures and precipitation against historical averages rather than day-to-day conditions.
Atlantic Corridor September Outlook
The Atlantic Corridor is expected to see scattered thunderstorms from September 1 to 12, with warm conditions giving way to cooler weather. The region then turns to scattered showers in the north from September 13 to 23, while the south stays sunny before isolated showers and cool conditions arrive in the final week.
That region’s average temperature is forecast at 68 degrees, 1 degree below normal, with 3 inches of precipitation, about 1 inch below average. People in the Atlantic Corridor get a mixed picture: rain and thunderstorms show up in stretches, but the month still finishes with a cooler-than-average temperature profile and less rain than usual.
Appalachians and Southeast
The Appalachians are expected to start September sunny and warm before scattered showers bring cooler conditions from September 7 to 12. In the Appalachians, isolated showers are expected in the north from September 13 to 23 while the south remains sunny, with cool temperatures turning warmer.
The Appalachians are forecast at 63 degrees, 2 degrees below average, with precipitation around 2 inches below average. The Southeast opens with sunny and mild conditions, then sees thunderstorms before sunshine returns from September 8 to 18, accompanied by cooler weather.
In the Southeast, another sunny and mild stretch is expected through September 24, with the month ending sunny as cool conditions turn warmer. The region is forecast at 74 degrees, 1 degree below average, with 2 inches of precipitation, about 3 inches below average.
Florida Through September
Florida begins the month with scattered thunderstorms and conditions turning from warm to cooler through September 11. Sunshine is expected in the north from September 12 to 20 while the south sees thunderstorms, with mild temperatures across the region.
Through the end of September, sunshine is forecast to continue in the north while isolated thunderstorms remain possible in the south. Florida’s outlook calls for 7.5 inches of precipitation, with the north 2 inches below average and the south 2 inches above average, alongside an average temperature of 80 degrees, 1 degree below average.
The Almanac’s September outlook gives readers a broad regional guide, but it also mixes warmth, cool spells, showers, and thunderstorms in the same month. For people in the United States, the practical takeaway is that September does not read as a single pattern; the regional forecast shifts by zone and changes again as the month moves forward.
