National Weather Service United States Department of Commerce
News Headlines

During the month of July, temperatures across much of the Northern Plains, including portions of South Dakota and west-central Minnesota were well below normal .  Aberdeen, Watertown and Pierre all ended up being in the top 10 for the coldest Julys on record.  

A few other interesting heat related tidbits from this “cool” July are listed below:
 
  • Aberdeen has failed to reach 90 F this July. This is only the third time this has occurred since 1893 (the other years were 1915, 1962, and 1996).
 
  • The highest temperature recorded in Watertown this July has been 83 F. This is the “coolest” monthly maximum temperature ever recorded in July. Records in Watertown date back to 1893.
 
  • Like the summer of 2008, Pierre has yet to record a 100 F temperature during the summer of 2009. In fact, the last time Pierre reached 100 F was on 4 September 2007. Since 1933, Pierre has never experienced back to back summers when the temperature failed to reach 100 F.
 
 
 
Top Ten Coldest Average July Temperatures in Aberdeen (1893-2009)
 
 

 

Value

Year(s)

1

64.2

1992

2

64.5

1915

3

67.1

1904

4

67.2

1950,1962

5 

67.4

2009 

6

67.5

1905

7

67.8

1958,1996

8

68.0

1895

9

68.1

1918

10 68.2 1971

 
 
 
 
Top Ten Coldest Average July Temperatures in Watertown (1893-2009)
 
 

 

Value

Year(s)

1

62.9

1992

2

64.1

1915

3

65.0

1906

4

65.7

2009 

5

65.8

1927

6

65.9

1905

7

66.7

1950

8

66.8

1918

9

67.1

1971

10

67.2

1913, 1925

 
 
 
Top Ten Coldest Average July Temperatures in Pierre (1933-2009)
 

 

Value

Year(s)

1

66.3

1992

2

69.8

1993

3

70.3

1972

4

70.4 2009

5

70.5

1950

6

70.7

1958

7

70.8

1971

8

71.5

1962

9

71.9

1994

10

72.4

1951, 1979

 


NWS Aberdeen SD