Summer 2009 Climate Summaries for La Crosse, WI & Rochester, MN

Below are the Summer 2009 Climate Summaries for La Crosse, WI and Rochester, MN...

La Crosse, WI..

...14th Coldest Summer in La Crosse WI...

Meteorological summer (June 1 through August 31) was cooler and drier than normal in La Crosse WI. More details are listed below...

Temperatures...

During meteorological summer...La Crosse Municipal Airport had an average temperature of 68.3 degrees.  This was 3.5 degrees below the normal of 71.8 degrees.  This ties 1902 and 1985 for the 14th coldest summer.  The last time La Crosse was this cold during a summer was back in 2004 when the average temperature was 67.8 degrees.  The coldest summer occurred back in 1915 when the average temperature was 65.5 degrees. 

The table below lists the top 20 coldest meteorological summers in La Crosse WI... 

     Coldest Meteorological Summer
     from June 1 through August 31
           in La Crosse WI

                 Average
    Rank       Temperature       Year
    ----       -----------       ----
      1        65.5 degrees      1915
      2        66.4 degrees      1927
      3        67.1 degrees      1992
      4        67.3 degrees      1924
      5        67.5 degrees      1917
      6        67.6 degrees      1891
      7        67.7 degrees      1904
      8        67.8 degrees      2004
               67.8 degrees      1903
     10        68.0 degrees      1965
               68.0 degrees      1945
     12        68.2 degrees      1950
               68.2 degrees      1912
     14        68.5 degrees      2009
               68.3 degrees      1985
               68.3 degrees      1902
     17        68.4 degrees      1951
               68.4 degrees      1875
     19        68.6 degrees      1926
     20        68.7 degrees      1928


The largest temperature departures from normal during this summer were the maximum temperatures.  They averaged just 78.3 degrees.  This was 4.7 degrees below the normal of 83.0 degrees.  This is very typical of an El Nino summer.  Looking at the 12 El Nino summers since 1950, 10 out of 12 had below normal maximum temperatures throughout meteorological summer.  Only 1987 (83.6 degrees or +0.6 degrees above normal) and 1991 (84.1 degrees, or +1.1 degrees above normal) had maximum temperatures average above normal. 

The table below provides a breakdown of the temperature departures from normal for La Crosse WI this summer...

                                            Departure from
                                                Normal
                                            --------------
June   Monthly Avg. Temp       67.8 degrees  -1.8 degrees
       Monthly Avg. Max Temp   77.5 degrees  -3.8 degrees
       Monthly Avg. Min Temp   58.1 degrees  +0.2 degrees

July   Monthly Avg. Temp       68.1 degrees  -5.9 degrees
       Monthly Avg. Max Temp   78.5 degrees  -6.7 degrees
       Monthly Avg. Min Temp   57.7 degrees  -5.1 degrees

August Monthly Avg. Temp       69.1 degrees  -2.5 degrees
       Monthly Avg. Max Temp   79.1 degrees  -3.4 degrees
       Monthly Avg. Min Temp   59.5 degrees  -1.2 degrees

Summer Seasonal Avg. Temp      68.3 degrees  -3.5 degrees
       Seasonal Avg. Max Temp  78.3 degrees  -4.7 degrees
       Seasonal Avg. Min Temp  58.4 degrees  -2.1 degrees


Precipitation...

During the meteorological summer...La Crosse Municipal Airport received 10.41 inches of precipitation.  This was 2.12 inches below the normal 12.53 inches.  Just over half (50.8 percent/) of this summer's rain fell during August.  This wetter-than-normal August caused the drought situation to improve from a moderate drought (D1) to abnormally dry (D0).

The table below contains the monthly precipitation totals and their departures from normal for the summer of 2009.

      2009 Meteorological Summer Precipitation
               in La Crosse WI

                Precipitation         Departure
   Month            Total            from Normal
   -----        ------------         -----------
   June         2.85 inches         -1.15 inches
   July         2.27 inches         -1.98 inches
   August       5.29 inches         +1.01 inches
 
   Summer      10.41 inches         -2.12 inches

Rochester, MN...

...4th Coldest Summer in Rochester MN...

Meteorological summer (June 1 through August 31) was cooler and drier than normal in Rochester MN. More details are listed below...

Temperatures...

During meteorological summer...Rochester International Airport had an average temperature of 65.6 degrees.  This was 2.4 degrees below the normal of 68.0 degrees.  This was the 4th coldest summer.  The last time Rochester was this cold during a summer was back in 2004 when the average temperature was 65.3 degrees.  The coldest summer occurred back in 1992 when the average temperature was 63.9 degrees. 

The table below lists the top ten coldest meteorological summers in Rochester MN... 

     Coldest Meteorological Summer
     from June 1 through August 31
           in Rochester MN

                 Average
    Rank       Temperature       Year
    ----       -----------       ----
      1        63.9 degrees      1992
      2        65.0 degrees      1958
      3        65.3 degrees      2004
      4        65.6 degrees      2009
      5        65.7 degrees      1967
      6        66.1 degrees      1985
      7        66.2 degrees      1969
               66.2 degrees      1892
      9        66.3 degrees      1945
     10        66.5 degrees      1996


The largest temperature departures from normal during this summer were the maximum temperatures.  They averaged just 75.2 degrees.  This was 2.9 degrees below the normal of 78.1 degrees.  This is very typical of an El Nino summer.       

The table below provides a breakdown of the temperature departures from normal for Rochester MN this summer...

                                            Departure from
                                                Normal
                                            --------------
June   Monthly Avg. Temp       65.9 degrees  -0.2 degrees
       Monthly Avg. Max Temp   75.3 degrees  -1.3 degrees
       Monthly Avg. Min Temp   56.4 degrees  -0.8 degrees

July   Monthly Avg. Temp       65.3 degrees  -4.8 degrees
       Monthly Avg. Max Temp   75.1 degrees  -5.0 degrees
       Monthly Avg. Min Temp   55.5 degrees  -4.6 degrees

August Monthly Avg. Temp       65.7 degrees  -2.0 degrees
       Monthly Avg. Max Temp   75.1 degrees  -2.4 degrees
       Monthly Avg. Min Temp   56.3 degrees  -1.7 degrees

Summer Seasonal Avg. Temp      65.6 degrees  -2.4 degrees
       Seasonal Avg. Max Temp  75.2 degrees  -2.9 degrees
       Seasonal Avg. Min Temp  56.1 degrees  -1.8 degrees


Precipitation...

During the meteorological summer...Rochester International Airport received 11.00 inches of precipitation.  This was 1.94 inches below the normal 12.94 inches. 

The table below contains the monthly precipitation totals and their departures from normal for the summer of 2009.

       2009 Meteorological Summer Precipitation
               in Rochester MN

                Precipitation         Departure
   Month            Total            from Normal
   -----        ------------         -----------
   June         3.33 inches         -0.67 inches
   July         3.51 inches         -1.10 inches
   August       4.16 inches         -0.17 inches
 
   Summer      11.00 inches         -1.94 inches



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