The 2019-20 astronomical winter (which ran from December 21st through March 18th) was much warmer-than-average and slightly wetter-than-average at both La Crosse WI and Rochester MN.  This was the earliest end of an astronomical winter since 1896 (ended at 8:23 PM CST on March 19).

Below are more details on each of these sites...

La Crosse WI...

Temperatures - 10th Warmest

During astronomical winter, temperatures averaged 27.7°F at La Crosse Regional Airport.  This was 7°F warmer than the long-term (1872-2020) average of 20.7°F.  This made it the 10th warmest winter and the warmest winter since 2016-17 (average temperature of 29.4°F - tied for 3rd warmest with 1881-82).  3 out of the last 5 winters are among the 14 warmest astronomical winters.  The following table lists the 20 warmest astronomical winters for La Crosse WI.

      Warmest Astronomical Winters
            in La Crosse WI
               1872-2020
 
              Average
  Rank      Temperature     Winter
  ----      -----------     ------
    1      36.5 degrees     1877-78
    2      30.7 degrees     2011-12
    3      29.4 degrees     2016-17
           29.4 degrees     1881-82
    5      28.9 degrees     1986-87
           28.9 degrees     1930-31
    7      28.6 degrees     2005-06
    8      28.5 degrees     1991-92
    9      28.0 degrees     1997-98
   10      27.7 degrees     2019-20
   11      27.5 degrees     1989-90
   12      27.4 degrees     1999-2000
   13      27.2 degrees     1920-21
   14      27.1 degrees     2015-16
   15      26.9 degrees     2001-02
   16      26.4 degrees     1972-73
   17      26.1 degrees     1943-44
   18      25.9 degrees     1932-33
   19      25.8 degrees     1982-83
   20      25.7 degrees     1879-80
   
The average high temperature was 36.3°F.  This was 6.8°F warmer than the long-term average of 29.5°F.  This was tied with 2005-06 for the 9th warmest and it was the warmest since 2016-17 (37.1°F - 4th warmest).

The average low temperature was 19°F.  This was 7°F warmer than the long-term average of 12.0°F.  This was tied with 1972-73 for the 12th warmest and it was the warmest since 2016-17 (21.6°F - tied for 3rd warmest with 1991-92).

• The warmest high temperature was 65°F on March 8.  
• The coldest high temperature was 9°F on January 16.  
   
• The warmest low temperature was 45°F on March 8.
• The coldest low temperature was -16°F on February 14.

Precipitation - Slightly Wetter-than-Average

• During astronomical winter, a total of 4.10" of precipitation fell at La Crosse Regional Airport.  This was 0.40" wetter than the long-term (1872-2020) average of 3.70". 
• Wettest day occurred on February 9 when 0.74" of precipitation fell.
• Measurable (0.01 inches or greater) precipitation fell on 29 days (32.6%) and trace amounts of precipitation fell on another 15 days (16.9%).

Snowfall - Slightly Below Average

• During astronomical winter, a total of 26.6" of snow fell near La Crosse Regional Airport.  This was 2.6" less than the long-term average (1896-2020) of 29.2".  
• Snowiest day occurred on February 9 when 8.5" of snow fell.
• Measurable (0.1 inches or greater) snow fell on 18 days (20.2%) and trace amounts of snow fell on another 17 days (19.1%).

Snow Depth - Slightly Below Average

• During astronomical winter, the average snow depth near La Crosse Regional Airport was 3.7".  This was 0.7" below the long-term (1893-2019) average of 4.4".
• Measurable snow (a half-inch or greater) was on the ground on 58 days or 65.2% of the season.
• Greatest snow depth was 11" on February 10.
• There was no snow on the ground on 25 days or 28.1% of the season.

Rochester, MN... 

Temperatures - Tied for 18th Warmest with 1943-44

During astronomical winter, temperatures averaged 22.4°F at Rochester International Airport.  This was 4.8°F warmer than the long-term (1886-2020) average of 17.6°F. It was tied with 1943-44 for the 18th warmest astronomical winter.  This was the warmest winter since 2016-17 (24.1°F - 8th warmest).  3 out of the last 5 winters are among the 18 warmest astronomical winters.  The following table lists the 20 warmest astronomical winters for Rochester MN.

      Warmest Astronomical Winters
            in Rochester MN
               1886-2020
 
              Average
  Rank      Temperature     Winter
  ----      -----------     ------
    1      29.5 degrees     2011-12
    2      27.6 degrees     1930-31
    3      26.5 degrees     1986-87
    4      26.1 degrees     2005-06
    5      25.8 degrees     1991-92
    6      24.9 degrees     1989-90
    7      24.2 degrees     1982-83
    8      24.1 degrees     2016-17
    9      23.6 degrees     1999-2000
   10      23.5 degrees     1997-98
   11      23.3 degrees     2015-16
   12      23.1 degrees     2015-16
   13      22.8 degrees     1932-33
   14      22.6 degrees     1972-73
           22.6 degrees     1963-64
   16      22.5 degrees     1980-81
           22.5 degrees     1932-33
   18      22.4 degrees     2019-20
           22.4 degrees     1943-44
   20      22.1 degrees     1941-42  

The average high temperature was 29.8°F.  This was 3.4°F warmer than the long-term average of 26.4°F. This was the 25th warmest.

The average low temperature was 15°F.  This was 6.2°F warmer than the long-term average of 8.8°F.  This was the 13th warmest.

• The warmest high temperature was 54°F on March 8.
• The coldest high temperature was 2°F on January 16 and February 13 (record coldest high for this date).
   
• The warmest low temperature was 39°F on March 8.
• The coldest low temperature was -24°F on February 14 (record low for this date).

Precipitation - Slightly Wetter than Average 

• During astronomical winter, a total of 3.47" of precipitation fell at Rochester International Airport.  This was 0.47" wetter the long-term (1886-2020) average of 3".  
• Wettest day occurred on February 9 when 0.74" of precipitation fell.
• Measurable (0.01 inches or greater) precipitation fell on 26 days (29.2%) and trace amounts of precipitation fell on another 16 days (18%).

Snowfall - Slightly Above Average

• During astronomical winter, a total of 30.1" snow fell near Rochester International Airport.  This was 2.2" above the long-term (1908-2020) average of 27.9".  
• Snowiest day occurred on February 9 when 9.6" of snow fell.
• Measurable (0.1 inches or greater) snow fell on 19 days (21.3%) and trace amounts of snow fell on another 16 days (18%).

Snow Depth - Same as the Long-Term Average

• During astronomical winter, the average snow depth near Rochester International Airport was 5.6".  This was the same as the long-term (1939-2020).
• Measurable snow was on the ground on 70 days or 78.7% of the season.
• Greatest snow depth was 15" on February 18-20.
• There was no snow on the ground on 11 days or 12.4% of the season.