Fall outlook: El Niño is taking charge of weather patterns
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forecast/national

The latest outlook for September through November is generally warm, but there are a few tastes of cooler weather.

Sara Tonks
BySara Tonks
3 days agoUpdated: August 13, 2026, 4:48 pm EDTPublished: August 15, 2026, 12:00 am EDT

How El Niño will impact how your fall feels this year

Who’s ready for pumpkin carving and dramatically throwing piles of multi-colored leaves into the air in slow motion? I know I am! But what about the weather? Will it be fall-ish and festive or summer 2.0?

Here is what you need to know according to the latest outlook from Atmospheric G2 and The Weather Company, covering the upcoming meteorological fall (September through November).

Key Takeaways

  • El Niño is making itself known with warmer-than-average temperatures in the Northern Tier and wetter-than-average conditions in the Southern Plains.
  • The Southern Plains will see a major temperature switch-up from above-average to below-average from September to October and November.
  • September’s temperature outlook has been warmed up for the Southern Plains from previous outlooks.
US map showing Fall 2026 temperature outlook with above-average temperatures across most regions, sourced from AG2 and The Weather Company

Fall (September through November) 2026 temperature outlook

US map showing Fall 2026 precipitation outlook with above-average green regions across most states and below-average orange areas in the Pacific Northwest

Fall (September through November) 2026 precipitation outlook

Monthly Details

The series of maps below shows the temperature outlooks each month from September through November.

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You can see the development of an El-Niño-esque pattern with warmer-than-average conditions spreading across the Northern Tier and cooler air (relative to what’s normal for the region) further south, especially later in the year.

The biggest whiplash will be in the Southern Plains and Northeast, though they’re going in opposite directions. The Northeast gets a cool taste of fall before things head back above average, and the Southern Plains start hot and then get much more into sweater weather territory.

(MORE: Is a record super El Niño inevitable? What does it mean, if so?)

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US map showing September 2026 temperature outlook with above-average heat in orange and red across most states, cooler blue in the Northeast

September 2026 temperature outlook

US map showing October 2026 temperature outlook, with orange above-average zones across most regions and a blue below-average area over Texas

October 2026 temperature outlook

Map showing US temperature outlook for November 2026, with orange indicating above-average and blue below-average temperatures across regions

November 2026 temperature outlook

Sara Tonks is a content meteorologist with weather.com and has a bachelor’s and a master’s degree from Georgia Tech in Earth and Atmospheric Sciences, along with a master’s degree from Unity Environmental University in Marine Science.

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