By The Numbers: September Temperature and Precipitation Summary

For September, the average contiguous U.S. temperature was 68.5°F, 3.7°F above the 20th century average, tying with 2015 as the second warmest September in the 125-year period of record. The warmest September on record occurred in 1998 and was 0.5°F warmer than in 2019.

Record heat was observed across parts of the central and southern Rocky Mountains, the southern Plains, and portions of the Midwest and Ohio Valley. 

Almost the entire primary livestock-production region observed above-normal temperatures.


Temperature Departure from Normal
Green/Blue = Colder than Normal  Brown = Milder than Normal

Rainfall was quite variable in September. Production areas within the Upper Midwest and parts of the northern and central Plains were unusually wet while the Deep South experience drought conditions. 

The average precipitation for September in the contiguous U.S. was 2.42 inches (0.07 inch below average), which puts the month in the middle third of the 125-year record. 

Wetter-than-normal conditions were found from the West Coast to the northern Plains and Great Lakes. North Dakota had its wettest September on record. 

Record dry conditions were present across Mississippi, Alabama, Georgia, Florida, Kentucky and West Virginia.

Precipitation Departure from Normal
Green/Blue = Wetter than Normal  Yellow = Drier than Normal

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