Image Source: Newsweek
September weather predictions Old Farmer’s Almanac forecasts are pointing to a varied start to fall across the United States, with cooler-than-normal conditions expected in many northern regions and warmer weather continuing across parts of the West and central states.
The Old Farmer’s Almanac released a region-by-region outlook for September 2026 on August 31. The long-range forecast describes broad trends in temperature and precipitation rather than exact daily conditions. It divides the country into zones and identifies areas that could experience above- or below-average rainfall and temperatures.
According to the publication, its forecasting method combines solar science, climatology and meteorology. Historical weather records, current solar activity and large-scale climate patterns, including El Niño and La Niña, are also considered when developing the outlook.
Powerful September Weather Predictions Old Farmer’s Almanac Reveals
The forecast suggests that September could bring a noticeable contrast between regions. Several northern areas may turn cool and wet, while the central United States could experience late-season heat, thunderstorms and periods of heavy rain.
Cooler and Wetter Conditions in the Northeast
The Northeast is expected to begin September with showery and cool weather through September 7. Sunny but cool conditions are forecast from September 8 to 11, followed by additional rainy periods before sunshine returns between September 12 and 19. Showers and cool temperatures may continue through the end of the month.
The region’s average temperature is projected to reach 59 degrees, about 2 degrees below normal. Precipitation could total 5.5 inches, approximately 2 inches above average.
The Atlantic Corridor may see scattered thunderstorms during the first 12 days of September. Warm conditions are expected to transition to cooler weather, while showers could affect the northern part of the region later in the month. Average temperatures are forecast at 68 degrees, with rainfall near 3 inches.
Storms and Sunshine Across the South
The Southeast is expected to open the month with sunny, mild conditions before thunderstorms develop. Sunshine may return from September 8 to 18, bringing cooler weather, followed by another mild and sunny stretch. The region’s average temperature is forecast at 74 degrees, with precipitation about 3 inches below normal.
Florida’s outlook is more humid and stormy. Scattered thunderstorms are possible through September 11, while northern Florida could become sunnier from September 12 onward. Storms may continue in the south. The state is expected to average 80 degrees, with 7.5 inches of precipitation overall. Rainfall could remain below average in the north but above average in the south.
In Texas and Oklahoma, September begins warm and sunny before thunderstorms and hot conditions develop between September 5 and 9. Sunny weather may dominate much of the middle of the month, while rainy periods, potentially heavy, are expected during the final five days. Temperatures could average 78 degrees, 1 degree above normal.
Important Shifts Across the Midwest and Plains
The Upper Midwest may experience a warm opening to September before showers and chilly weather arrive. Rainy periods and cool conditions are forecast from September 17 through the end of the month. Temperatures could average 57 degrees, or 2 degrees below normal, with rainfall around 3.5 inches.
The Heartland may see a more dramatic swing. Sunny and warm conditions could give way to chilly showers early in the month, followed by sunshine, thunderstorms and a hot stretch from September 20 to 23. The forecast calls for an average temperature of 68.5 degrees and below-average precipitation.
The High Plains are expected to start very warm, then turn cooler before warmer weather returns in the second half of September. Isolated thunderstorms and showers may appear in the south, while the region’s average temperature is forecast at 65 degrees, 2 degrees above normal.
Western Forecast Brings Heat, Rain and Regional Contrasts
The Pacific Northwest is forecast to remain sunny and very warm through September 10. Showers and cooler weather may follow, with rainy and chilly conditions expected during the final part of the month. Precipitation could reach 4.5 inches, roughly 3 inches above average.
The Desert Southwest may experience thunderstorms early in the month before sunny, warm and very warm conditions take over. Cooler, rainy periods are possible from September 23 to 26. The region is forecast to average 81 degrees.
In the Intermountain Region, a north-south divide is expected. Northern areas may turn cool while southern locations remain warm. The Pacific Southwest should see mostly sunny weather, though showers could affect the north later in the month.
Alaska and Hawaii Face Notable Weather Risks
Alaska’s September outlook includes rain and snow showers, with temperatures turning cooler through September 12. Flurries may develop in northern areas later in the month, while rain and snow could return across northern and central Alaska. Temperatures are forecast to remain 2 degrees below average.
Hawaii may see scattered showers and warm conditions early in September, followed by periods of heavy rain. The Old Farmer’s Almanac also flags a tropical storm threat from September 23 to 25. Residents and visitors should monitor official forecasts as that period approaches.
Because long-range outlooks describe general patterns, conditions can change as September unfolds. Travelers, outdoor enthusiasts and residents in areas expecting heavy rain should use local weather services for short-term warnings and updates.
Frequently Asked Questions
What does the September forecast predict for the United States?
The outlook predicts a mix of cooler temperatures, rainfall, thunderstorms and late-season heat, depending on the region.
Which region could receive the most rain?
Florida is forecast to receive about 7.5 inches of precipitation, although rainfall could vary significantly between northern and southern areas.
Will September be colder than normal?
Many northern regions, including the Northeast, Upper Midwest and Alaska, are expected to average below-normal temperatures.
Is there a tropical storm risk in Hawaii?
Yes. The Old Farmer’s Almanac identifies a possible tropical storm threat in Hawaii from September 23 to 25.
