September 2023 Climate Report for Memphis, TN

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September Climate Recap

The month of September was generally very warm, and averaged more than a degree and a half above normal. But Mid-Southerners experienced a nice reprieve from the heat during the middle third of the month as “false fall” brought low dewpoints and fairly pleasant conditions following a strong front on the 7th. However, summer returned for much of the last third of the month as temperatures rose above 90 degrees once again on multiple days. No records were set despite the late season heat.
Early signs of drought that began in the Mississippi Delta spread north across the metro during the month as precipitation ended well below average during the climatologically driest month of the year. Most precipitation fell on just a few days in September, with thunderstorms occurring on the 4th, 6th, and 20th. Otherwise rainfall was spotty to non-existent. Storms resulted in Severe Thunderstorm Warnings in north MS (on the 6th) and 20th (Shelby/Tipton Counties). A tree was downed in Memphis on the 20th and a few were taken down in north MS on the 6th. In addition, the Mississippi River at Memphis preliminarily set a new record low river stage at -10.97′ on the 14th, a couple inches lower than the previous record set just last year.

Memphis International Airport, Memphis, TN

Average temperature: 77.7 degrees (1.7 degrees above average) 
Average high temperature: 87.8 degrees (1.8 degrees above average) 
Average low temperature: 67.6 degrees (1.7 degrees above average) 
Warmest temperature: 97 degrees (4th) 
Coolest temperature: 60 degrees (18th) 
Heating Degrees Days: 0 (7 below average)
Cooling Degree Days: 388 (53 above average) 
Records set or tied: None 
Comments: 11 days reached 90°, which is 0.8 days above average for the month of September

Monthly total: 1.63″ (1.40″ below average) 
Days with measurable precipitation: 4 (3.1 days below average) 
Wettest 24-hour period: 0.97″ (6th) 
Snowfall: None
Records set or tied: Record daily rainfall tied (0.97″ on the 6th)
Comments: 92% of the month’s rainfall fell on just two days
Peak wind: Northwest/39 mph (6th) 
Average wind: 6.1 mph 
Average relative humidity: 63%
Average sky cover: 41%
 Click here for a daily statistical recap for Memphis International Airport. Headquarters, Bartlett, TN

Average temperature: 73.5 degrees 
Average high temperature: 86.8 degrees 
Average low temperature: 63.5 degrees 
Warmest temperature: 95.8 degrees (4th) 
Coolest temperature: 53.8 degrees (15th) 
Comments: None 
Monthly total: 1.32″ (automated rain gauge), 1.27″ (CoCoRaHS rain gauge) 
Days with measurable precipitation: 5
Wettest date: 0.53″ (12th) (via automated gauge) 
Snowfall: None
Comments: None

Peak wind: South-southwest/18 mph (5th)
Average relative humidity: 76% 
Average barometric pressure: 30.02in. Hg

Comments: None

Click here for a daily statistical recap for Bartlett, TN.


MWN Forecast Accuracy

MWN average temperature error: 1.83 degrees 
MWN forecast temperatures within 2 degrees of actual: 76% 
MWN average dewpoint error: 1.77 degrees 
MWN forecast dewpoints within 2 degrees of actual: 79% 
MWN’s forecasts extend out five periods (2.5 days, or roughly 60 hours). Historical accuracy statistics can be found here.

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