Who Will Feel Like Fall In September

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T​emperatures in September might be a west-to-east split between summer's leftover heat and conditions more typical for the month, according to an outlook released Friday by The Weather Company and Atmospheric G2.

That "fall feel" could be interrupted at times in the West and Plains. The outlook calls for the hottest conditions relative to September's average to grip areas from parts of Arizona and New Mexico to Montana and North Dakota. Locations as far east as the upper Midwest and as far west as California's interior should also be above average.

W​hile the loss of daylight is the main trigger for fall foliage to develop, this lingering warmth might delay its emergence in some places.

(​MORE: When Peak Fall Color Typically Happens)

The South and East will be close to average, but there's a catch. Temperatures might hedge a bit below average in the coastal Southeast and mid-Atlantic for the month as a whole, and slightly above average from New England to eastern and central Texas.

O​ne caveat about this portion of the outlook: Temperatures close to average or cooler to start the month in the East might mask a warmer ending.

"Note that we expect the major population centers of the East to get significantly warmer in the back half of the month," wrote Todd Crawford, Vice President of Meteorology at Atmospheric G2, in the outlook.

S​o the cool trend to start the month might not last as we head through September's second half.

(​MORE: September's Typical Weather Changes)

September could be dry in the Midwest and wet in the Southeast. The best chance for a wetter-than-average September is in Florida and parts of Georgia, Alabama, South Carolina, southern Mississippi and southeast Louisiana. That might be related to possible tropical activity in the month.

A​n area from Colorado to the Central Plains, upper Mississippi Valley and Great Lakes has the best odds for below-average precipitation.

Chris Dolce has been a senior meteorologist with weather.com for over 10 years after beginning his career with The Weather Channel in the early 2000s.