August 2007...One of the Hottest Months of Record

A Cool Finish for a Hot Month. 
 
The temperature at Indianapolis International Airport failed to reach 80 degrees on Thursday for the first time since July 20.  And this morning the temperature fell below 60 degrees for the first time since July 24.  August 2007 has been one of the hottest Augusts and months of record.
 
Through August 30, August 2007 remains the second warmest start to August of record.  The average temperature of 80.3 degrees is 6.7 degrees above normal.  The combination of a cool morning and an expected afternoon high near 80 degrees will lower the monthly average temperature to around 79.9 degrees.
 
As a result, August 2007 will likely be the 3rd hottest August of record and the hottest August since 1983.  See table below for 10 hottest Augusts of record.
 
 
Hot Augusts of Record
Year
Ave. Temp.
   
1936
80.5
 
1983
80.1
 
1995
79.6
 
1900
79.3
 
1947
79.0
 
1918
78.3
 
1881
78.0
 
1872
77.7
 
1988
77.5
 
2002
77.4
 
 
 
It is rare that the average monthly temperature for any month at Indianapolis is 80 degrees or higher.  This has occurred only 8 times at Indianapolis since 1871.  As expected, this occurs during the month of July or August. The last time this happened was August 1983. See table below for the hot months with an average of 80 degrees or higher. 
 
 
Months with Average Temperature of 80 Degrees or Higher

Month/Year

Average Temperature

July 1936

82.8

July 1901

81.9

July 1934

81.6

July 1921

81.1

July 1916

80.7

Aug 1936

80.5

July 1887, Aug 1983

80.1

 
  
There have been only 10 months with 20 or more days of 90 degrees or higher.  August 2007 is the latest with 22 occurrences. The record is 25 days set in July 1901.  The record for August is 23 set in 1983. The average for August is 5.
 
 
Months with 20 or more 90 degree days
July 1901
25
Aug 1983
23
July 1983, Aug 2007
22
July 1916, July 1921, Aug 1936
21
July, 1893, July 1919, Aug 1995
20
 
 
For the year, Indianapolis has seen 30 days with a temperature of 90 degrees or higher. The last time a year had more 90 degree days was during 2002 which had 36 days. The record is 58 set during 1983. There have been 33 years with 30 or more 90 degree days. The normal amount of days in the 90s for a year is 18.


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