Cool July 2009

Preliminary numbers show that July will finish as the 3rd coldest July on record for Minnesota. For some locations, this was the coldest July ever. International Falls shattered its coldest July on record with an average temperature of 58.8 degrees, which broke the old record of 59.4 degrees set in 1992. Rochester had its second coldest July on record with 65.3 degrees, second only to 64.2 degrees set in 1992. July 2009 finished as the third coldest in St. Cloud with 66 degrees.

While the Twin Cities failed to reach the top ten coldest, the monthly average of 70 degrees makes July 2009 the coldest July since 1996. The coldest July on record for the Twin Cities is 1992 with 65.8 degrees. Duluth was also not quite cool enough in July to make it into the top ten.

Below are public informatrion statements and record event reports from the National Weather Service regarding the cold July.


PUBLIC INFORMATION STATEMENT...CORRECTED VALUE
NATIONAL WEATHER SERVICE LA CROSSE WI
650 AM CDT SAT AUG 1 2009

...SECOND COLDEST JULY IN ROCHESTER MN...

DURING JULY 2009...ROCHESTER INTERNATIONAL AIRPORT HAD AN 
AVERAGE TEMPERATURE OF 65.3 DEGREES.  THIS WAS 4.8
DEGREES BELOW THE NORMAL OF 70.1 DEGREES.  THIS WAS 
THE SECOND COLDEST JULY IN ROCHESTER.  
THE COLDEST JULY OCCURRED BACK IN 1992 WHEN THE AVERAGE 
TEMPERATURE WAS 64.2 DEGREES.  

THE TABLE BELOW SHOWS THE COLDEST JULYS IN ROCHESTER MN...

          COLDEST JULYS
     IN ROCHESTER MINNESOTA
            1873-2009

             AVERAGE   RANK     TEMPERATURE     YEAR
  ----     -----------     ----
    1      64.2 DEGREES    1992
    2      65.3 DEGREES    2009
    3      66.8 DEGREES    1996
           66.8 DEGREES    1958
    5      66.9 DEGREES    1967
           66.9 DEGREES    1915
    7      67.0 DEGREES    1971
    8      67.3 DEGREES    1994
    9      67.4 DEGREES    1962
   10      67.6 DEGREES    1892


PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
642 AM CDT SAT AUG 1 2009

...THIRD COLDEST JULY IN LA CROSSE WI...

DURING JULY 2009...LA CROSSE MUNICIPAL AIRPORT HAD AN AVERAGE 
TEMPERATURE OF 68.1 DEGREES.  THIS WAS 5.9 DEGREES BELOW THE 
NORMAL OF 74.0 DEGREES.  THIS WAS THE THIRD COLDEST JULY IN 
LA CROSSE.  THE COLDEST JULY OCCURRED BACK IN 1891 WHEN THE 
AVERAGE TEMPERATURE WAS 66.9 DEGREES.  

THE TABLE BELOW SHOWS THE COLDEST JULYS IN LA CROSSE WI...

          COLDEST JULYS
    IN LA CROSSE WISCONSIN
            1873-2009

             AVERAGE   RANK     TEMPERATURE     YEAR
  ----     -----------     ----
    1      66.9 DEGREES    1891
    2      68.0 DEGREES    1992
    3      68.1 DEGREES    2009
    4      68.4 DEGREES    1971
    5      68.5 DEGREES    1962
    6      68.6 DEGREES    1882
    7      68.7 DEGREES    1915
    8      69.0 DEGREES    1922
    9      69.1 DEGREES    1924
   10      69.3 DEGREES    1884


PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE LA CROSSE WI
702 AM CDT SAT AUG 1 2009

...JULY WAS COLDER THAN JUNE IN ROCHESTER MN...

DURING JULY 2009...THE AVERAGE TEMPERATURE AT ROCHESTER 
INTERNATIONAL AIRPORT WAS 65.3 DEGREES.  THIS WAS SIX 
TENTHS OF A DEGREE COLDER THAN JUNE.  THIS IS ONLY THE 
EIGHTH TIME THAT THIS HAS OCCURRED /1911...1956...1971...
AND 1991-94).  THE LARGEST DIFFERENCE OCCURRED BACK IN 
1971 WHEN JUNE WAS A REMARKABLE 4.4 DEGREES WARMER THAN JULY.


RECORD EVENT REPORT NATIONAL WEATHER SERVICE LA CROSSE WI
711 AM CDT SAT AUG 1 2009

...COLDEST MAXIMUM JULY TEMPERATURE EVER IN LA CROSSE WI...

DURING JULY 2009...THE WARMEST TEMPERATURE AT LA CROSSE MUNICIPAL
AIRPORT WAS JUST 86 DEGREES ON THE 27TH. ONLY JULY 1922 /ALSO 86 
DEGREES/ FAILED TO HAVE A WARMER TEMPERATURE IN A JULY.

IN ADDITION...JULY 2009 WAS ONLY THE ELEVENTH JULY SINCE 1873 TO FAIL 
TO HAVE AT LEAST ONE 90 DEGREE DAY. THE LAST TIME THIS OCCURRED WAS 
BACK IN 1993 WHEN THE WARMEST TEMPERATURE OF THE MONTH WAS 87 DEGREES.

PUBLIC INFORMATION STATEMENT 
NATIONAL WEATHER SERVICE SIOUX FALLS SD 
635 AM CDT SAT AUG 1 2009

...ONE OF THE COOLEST JULYS ON RECORD IN THE AREA...

AT THE REGULAR REPORTING CLIMATE SITES OF SIOUX FALLS...
SIOUX CITY...AND HURON...JULY AVERAGED OUT WITHIN THE 
TOP FIVE COOLEST JULYS ON RECORD...GOING BACK TO THE 
LATE 1800S. THE FOLLOWING
ARE THE STATISTICS FOR EACH SITE...

AT SIOUX FALLS...IT WAS THE 4TH COOLEST JULY ON RECORD 
WITH AN AVERAGE TEMPERATURE OF 68.6 DEGREES OR 4.4 DEGREES BELOW NORMAL.
THE AVERAGE DAILY HIGH OF 79.5 DEGREES TIED THE YEAR OF 1950 FOR
THE THIRD COOLEST AVERAGE MAXIMUM ON RECORD IN JULY. THE 
COOLEST JULY ON RECORD WAS IN 1992 WITH A CHILLY AVERAGE OF 65.5 DEGREES.

AT SIOUX CITY...IT WAS THE 5TH COOLEST JULY ON RECORD 
WITH AN AVERAGE TEMPERATURE OF 70.2 DEGREES... 4.4 DEGREES BELOW NORMAL.
MOST OF THIS WAS DUE TO THE AVERAGE DAILY LOW OF 58.7 DEGREES...
WHICH WAS THE SECOND COOLEST AVERAGE MINIMUM ON RECORD IN JULY.
THE COOLEST JULY ON RECORD WAS IN 1992 WITH AN AVERAGE OF 68.6 DEGREES. 
AT HURON...IT WAS ALSO THE 5TH COOLEST JULY ON RECORD WITH 
AN AVERAGE TEMPERATURE OF 68.5 DEGREES OR 4.9 DEGREES BELOW NORMAL.
THE COOLEST JULY ON RECORD WAS AGAIN IN THE VERY COOL JULY OF
1992 WITH AN AVERAGE OF 65.1 DEGREES.