The September weather predictions Old Farmer’s Almanac readers have been waiting for are here, offering an early look at how the opening weeks of fall may unfold across the United States and Canada.
According to the Old Farmer’s Almanac Fall 2026 forecast, September is expected to bring a fascinating mixture of regional weather patterns. Much of the U.S. interior is forecast to remain warmer than average, while large parts of the East Coast and Pacific Coast are expected to experience cooler-than-average conditions. Much of the country is also expected to be drier than normal, although wetter conditions are forecast in several western regions, parts of Texas, and selected areas elsewhere.
That contrast makes September especially interesting.
For some communities, the month may provide an earlier taste of autumn. For others, summer warmth could linger well into the season. Farmers, gardeners, travelers, families, and outdoor enthusiasts can all benefit from understanding the broader seasonal outlook.
The most encouraging part is that September’s changing conditions create opportunities to enjoy the transition between summer and fall while preparing for the months ahead.
What the Old Farmer’s Almanac Predicts for September 2026
The Old Farmer’s Almanac describes the overall Fall 2026 pattern as a warm interior surrounded by cooler conditions along much of the nation’s coasts.
The forecast covers both temperature and precipitation, with substantial differences from one region to another.
Across much of the interior United States, temperatures are expected to run above average during September and October. Meanwhile, much of the eastern United States and Pacific Coast is projected to experience cooler-than-average weather.
Rainfall is also expected to vary considerably.
Much of the country could be drier than average, while the West Coast, central and northern Rockies, portions of Texas, southern Florida, and parts of the Northeast are expected to see wetter conditions.
This regional contrast is one of the defining features of the 2026 fall forecast.
September Could Bring an Early Taste of Fall
September is naturally a month of transition.
The final days of summer gradually give way to shorter days, cooler evenings, changing leaves, and the beginning of autumn routines.
The Old Farmer’s Almanac’s 2026 forecast suggests that this transition will not happen at the same speed everywhere.
Some areas may experience noticeably cooler weather early in the month, while others could continue seeing summer-like warmth.
This means September could feel very different depending on where you live.
For people in cooler regions, the arrival of fall may bring comfortable outdoor conditions, lower humidity, and opportunities for hiking, gardening, festivals, and weekend trips.
For warmer areas, the extended summer-like conditions could provide additional time for outdoor activities and seasonal travel.
Northeast: Cooler and Wetter Conditions
The Northeast is expected to experience one of the cooler and wetter patterns this fall.
The Old Farmer’s Almanac forecasts below-average temperatures along with increased precipitation across the region.
This could create classic early-autumn conditions.
Cool mornings may become more common, while rainfall could contribute to the gradual transformation of the landscape.
For residents and visitors, the cooler pattern could provide comfortable conditions for exploring parks, historic towns, forests, and scenic areas.
The region’s transition into fall is often one of the most visually impressive seasonal changes in North America.
Atlantic Corridor: Cooler and Drier
The Atlantic Corridor is expected to experience cooler and drier conditions during September and October.
The Old Farmer’s Almanac projects temperatures approximately 1°F below normal along the region, with rainfall roughly an inch below average.
For outdoor planners, this could create useful windows for activities that are more difficult during hot summer conditions.
Lower temperatures can also make walking, sightseeing, outdoor events, and recreational activities more comfortable.
The drier pattern may also provide opportunities for completing outdoor projects before wetter periods arrive later in the year.
Appalachians: A Cooler September
The Appalachian region is also expected to experience below-average temperatures.
The Old Farmer’s Almanac forecasts September temperatures around 2°F below average, accompanied by below-normal precipitation.
The combination could create a refreshing early-autumn atmosphere.
Mountain areas often experience seasonal changes earlier than surrounding lowlands.
Cooler conditions can encourage visitors to explore hiking trails, scenic overlooks, forests, and small mountain communities.
The forecast could therefore support a strong start to the region’s autumn outdoor season.
Southeast: Cooler and Drier Weather
The Southeast is also expected to trend cooler than normal during September and October.
The Old Farmer’s Almanac forecasts temperatures around 1°F below average, while northern parts of the region could receive about 2 inches less rainfall than normal. Southern areas may see rainfall deficits of up to 4 inches.
For residents, cooler weather could provide welcome relief following the heat of summer.
Lower temperatures can make outdoor activities more comfortable and reduce some of the challenges associated with prolonged summer heat.
However, drier conditions also make responsible water use and attention to local fire conditions important.
Florida: Cooler Conditions With Regional Rain Differences
Florida is expected to experience cooler-than-average conditions during the fall.
Northern Florida is projected to be cooler and drier, while southern Florida could also be cooler but receive slightly above-average rainfall.
The regional difference highlights why broad seasonal forecasts should not be treated as identical predictions for every city.
Florida’s large geographic area creates significant differences between northern, central, and southern locations.
For travelers, September may still provide plenty of opportunities for beach visits, outdoor recreation, and tourism, but local forecasts should be checked closer to specific travel dates.
Lower Lakes: A Cooler September
The Lower Lakes region is expected to experience cooler-than-average temperatures in September before conditions move closer to average in October.
Rainfall is projected to be near average during September before becoming slightly below average in October.
A more detailed Old Farmer’s Almanac long-range forecast for the Chicago area, which falls within the Lower Lakes region, shows early September beginning sunny and cool before warmer conditions, followed by several periods of rain and cooler weather later in the month.
This pattern reflects September’s transitional character.
The month may alternate between lingering summer warmth and unmistakable autumn weather.
Ohio Valley: Cooler Before a Return Toward Normal
The Ohio Valley is also expected to start the fall season on the cooler side.
September is forecast to be cooler than average, with temperatures becoming closer to normal in October. Western portions of the region could experience significantly below-average rainfall.
The cooler September pattern could provide pleasant conditions for outdoor activities.
At the same time, lower rainfall in some areas makes it important for gardeners and agricultural communities to monitor soil moisture.
Deep South: A Cooler and Drier September
The Deep South could experience a cooler and drier September before October becomes warmer.
The Old Farmer’s Almanac expects September temperatures to be below average, followed by an October that could average about 2°F above normal. September rainfall is also expected to be below average.
This creates a notable seasonal shift.
Residents may enjoy more comfortable temperatures during September before warmer conditions return in October.
The transition could also provide opportunities for outdoor work, gardening, and recreation.
Upper Midwest: Cooler September With More Rain
The Upper Midwest stands out because September is expected to be cooler than average while rainfall may run slightly above average.
The Old Farmer’s Almanac expects October to become slightly warmer than average and wetter than average as well.
For agricultural communities, rainfall can be beneficial when moisture conditions are favorable.
For gardeners and homeowners, however, wetter conditions can require more attention to drainage and plant health.
The cooler weather can still provide a comfortable start to the autumn season.
Heartland: Warmer Northern Areas
The Heartland presents another regional contrast.
Northern parts of the region are expected to be slightly warmer than average during the fall, while southern areas may be slightly cooler.
September is forecast to be drier than average before rainfall increases in October.
This gradual change could allow outdoor projects and seasonal preparations to continue before wetter weather becomes more common later in the fall.
Texas and Oklahoma: A Significant Rainfall Story
Texas and Oklahoma are expected to show substantial regional differences.
Northern Texas and Oklahoma are forecast to be slightly cooler than average during the fall, with rainfall potentially up to 4 inches above average.
Southern Texas, by contrast, is expected to remain warmer than average with slightly above-average precipitation.
These differences demonstrate the importance of location-specific forecasts.
A seasonal pattern covering an entire state or region can still produce very different experiences from one community to another.
High Plains: Warm and Dry
The High Plains are expected to experience warmer-than-average temperatures during the fall.
Both September and October are forecast to be drier than average.
The combination of warmth and reduced rainfall can create pleasant conditions for certain outdoor activities, but it also makes moisture management important.
Farmers, ranchers, and land managers can benefit from monitoring local conditions closely.
Desert Southwest: Warm September
The Desert Southwest is expected to experience a warmer-than-average September before October becomes slightly cooler.
Rainfall is expected to remain below average throughout the fall.
The forecast suggests that summer-like warmth may remain noticeable in September.
For visitors, this can mean excellent opportunities for early-morning outdoor activities, scenic drives, and desert exploration while avoiding the most intense daytime heat.
Pacific Northwest: Cooler and Wetter
The Pacific Northwest is expected to experience one of the wetter and cooler fall patterns.
The Old Farmer’s Almanac forecasts cooler-than-average conditions and rainfall above normal, with September potentially receiving as much as 3 inches more precipitation than usual.
This could create an early return of the region’s familiar rainy-season atmosphere.
For residents, it is a good opportunity to prepare rain gear, drainage systems, gardens, and outdoor spaces.
For travelers, the region’s forests and landscapes can become particularly beautiful as moisture returns.
Pacific Southwest: Near-Normal September Temperatures
The Pacific Southwest is expected to have near-normal temperatures during September before October becomes slightly cooler.
Northern areas could receive a modest increase in rainfall, while southern portions may remain drier than average.
The balanced September temperature outlook could provide favorable conditions for outdoor activities.
The region’s diverse geography means local conditions can still vary considerably.
Alaska: Cooler Northern Conditions
Alaska is expected to experience a divided pattern.
Northern Alaska is forecast to be cooler than average, while southern areas could trend warmer.
Overall precipitation is expected to remain below average, although northern parts could see an early opportunity for snow.
For residents, September can be a crucial preparation period before winter becomes more influential.
The cooler northern forecast makes early seasonal planning especially valuable.
Hawaii: Cooler With Potential for More Rain
Hawaii is expected to experience cooler-than-average temperatures during September and October.
Eastern portions of the islands could receive rainfall up to 4 inches above average, while the Old Farmer’s Almanac also identifies the possibility of a tropical storm in mid-September.
This combination makes local weather monitoring especially important.
At the same time, cooler conditions and rainfall can contribute to lush landscapes and refreshing outdoor environments.
Canada: A Milder Fall Ahead
The Old Farmer’s Almanac’s Fall 2026 forecast also covers Canada.
Overall, Canada is expected to experience a milder-than-average fall, although some central and northern areas and southwestern British Columbia could be cooler. Precipitation is expected to be above average across much of the country, with British Columbia standing out as an exception.
This suggests a fall season with substantial regional variation.
Some communities may enjoy extended mild temperatures, while others prepare for wetter or cooler conditions.
Southern Ontario: Cooler September
Southern Ontario is expected to experience a cooler-than-normal September before temperatures move closer to average in October.
Rainfall is forecast to be well above average in the east and slightly above average in the west.
This could create a classic transition into autumn, with cooler air and increased rainfall setting the stage for seasonal changes.
Southern Prairies: Warmer and Wetter
The Southern Prairies are forecast to experience warmer-than-average conditions, with October showing the strongest temperature departure.
Both September and October are expected to be wetter than normal.
For agricultural communities, precipitation can be an important factor in soil moisture and crop conditions.
Weather conditions will still vary locally, making shorter-range forecasts essential for operational decisions.
Why Long-Range Weather Predictions Matter
Long-range forecasts cannot provide the same level of precision as a short-term weather forecast.
Instead, they offer a broad picture of likely seasonal trends.
The Old Farmer’s Almanac says its long-range forecasts correctly predict the direction of seasonal temperature and precipitation departures about 80% of the time, while also emphasizing that weather cannot be predicted with total accuracy.
That distinction is important.
A seasonal outlook can help with planning, but it should not replace a local forecast when making decisions involving severe weather, travel, agriculture, or safety.
September Weather and Outdoor Plans
One of the biggest benefits of understanding seasonal trends is better planning.
Cooler areas may offer excellent conditions for hiking, camping, sightseeing, outdoor festivals, and family activities.
Warmer regions can continue supporting summer-style recreation while gradually transitioning into fall.
Drier conditions may provide opportunities for outdoor construction, landscaping, and gardening.
Wetter areas can benefit from preparing drainage systems and rain equipment.
The key is flexibility.
September is a month that rewards people who are prepared for change.
September Gardening Opportunities
September is also an important month for gardeners.
The weather forecast can help determine when to continue summer maintenance and when to begin autumn preparations.
Cooler temperatures can benefit certain plants, while rainfall patterns influence irrigation needs.
In drier regions, conserving soil moisture can become especially important.
In wetter areas, gardeners may need to pay closer attention to drainage and fungal problems.
The changing season also provides an opportunity to clean garden beds, prepare soil, plant suitable fall crops, and organize outdoor spaces before winter.
September and the Changing Seasons
September has always carried a special emotional character.
It is the month when summer begins to loosen its grip and autumn starts making its presence known.
The Old Farmer’s Almanac notes that September historically represents the harvest season, with the month traditionally associated with gathering crops and preparing for winter.
That seasonal meaning remains relevant today.
The weather may change from warm afternoons to cool evenings.
Trees may begin changing color.
Gardens move toward the end of their productive summer cycle.
Communities begin preparing for the colder months.
September is therefore not simply a weather transition.
It is a moment of preparation and renewal.
The Upside of the 2026 September Forecast
The regional differences in the forecast create plenty of positive possibilities.
Cooler conditions can bring relief from summer heat.
Moderate temperatures can improve outdoor comfort.
Rainfall can support landscapes and water resources where moisture is needed.
Drier weather can help communities complete outdoor work.
Warmer conditions can extend the summer season in areas where people want more time outdoors.
The most important advantage is preparation.
Knowing the broader trend allows people to make smarter decisions about travel, gardening, agriculture, outdoor activities, and seasonal maintenance.
Preparing for September Weather
Regardless of location, a few simple preparations can make the transition easier.
Check local short-range forecasts regularly.
Keep appropriate clothing available for changing temperatures.
Prepare rain gear if your region is expected to be wetter.
Monitor soil moisture in drier areas.
Inspect gutters and drainage before periods of heavy rainfall.
Plan outdoor activities around comfortable weather windows.
Keep emergency supplies available in regions vulnerable to severe storms.
Most importantly, treat long-range forecasts as guidance rather than certainty.
Weather can change, and local conditions can differ considerably from broad regional predictions.
Final Thoughts
The September weather predictions Old Farmer’s Almanac has released for 2026 paint a fascinating picture of the beginning of fall.
The United States is expected to experience a mixture of warmer interior conditions and cooler weather across much of the East and Pacific Coast. Rainfall will also vary, with many areas expected to be drier than normal while parts of the West, Rockies, Texas, Northeast, and southern Florida could receive more precipitation.
Canada is also expected to experience a generally mild fall, although wetter conditions and significant regional contrasts are likely.
For people watching the arrival of autumn, September offers plenty of reasons for optimism.
Cooler temperatures can make outdoor life more enjoyable.
Rain can refresh landscapes.
Warmer regions can enjoy a longer summer.
Gardeners can prepare for the next growing cycle.
Farmers can use seasonal information to support planning.
Families can make the most of the changing season.
The most valuable lesson from the 2026 outlook is that September will not look the same everywhere.
Its beauty lies in that variety.
The best approach is simple: stay informed, remain flexible, and enjoy the opportunities each regional pattern brings.
September is a month of change, and the Old Farmer’s Almanac 2026 forecast suggests that this year’s transition into autumn could be especially interesting.
Reference
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