Record envelope, standing records and threshold days for Winona (USC00219067), Minnesota, United States, with 117 years of record.
Key Facts for Winona
Winona (USC00219067) is a weather station in Minnesota, United States at 44.04 latitude and -91.64 longitude, 199 m (652 ft) above sea level.
The station reports from 1893 to 2009, 117 years of record.
1,464 records set at Winona still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Winona set a daily record high minimum temperature of 23.9 C (75.0 F) on 14 August 2009.
About the Station
Location: Minnesota, United States, 44.04 latitude, -91.64 longitude.
Elevation: 199 m (652 ft).
Period of record: 1893 to 2009, 117 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
0 days at or beyond a record
Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Winona. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Winona, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
17.8 C (64.0 F)
-37.2 C (-35.0 F)
n/a
n/a
Feb
22.8 C (73.0 F)
-36.1 C (-33.0 F)
n/a
n/a
Mar
28.9 C (84.0 F)
-33.3 C (-27.9 F)
n/a
n/a
Apr
35.6 C (96.1 F)
-15.6 C (3.9 F)
n/a
n/a
May
41.7 C (107.1 F)
-6.1 C (21.0 F)
n/a
n/a
Jun
41.1 C (106.0 F)
1.7 C (35.1 F)
n/a
n/a
Jul
42.2 C (108.0 F)
6.1 C (43.0 F)
n/a
n/a
Aug
39.4 C (102.9 F)
0.6 C (33.1 F)
n/a
n/a
Sep
38.9 C (102.0 F)
-3.9 C (25.0 F)
n/a
n/a
Oct
33.9 C (93.0 F)
-13.9 C (7.0 F)
n/a
n/a
Nov
28.9 C (84.0 F)
-23.9 C (-11.0 F)
n/a
n/a
Dec
18.3 C (64.9 F)
-33.3 C (-27.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Winona still stand. 1936 holds the most, with 43.
Standing records at Winona by the year they were set
Year set
Standing records
1893
16
1894
16
1895
13
1896
13
1897
1
1902
5
1903
15
1904
8
1905
11
1906
12
1907
11
1908
9
1909
15
1910
17
1911
29
1912
20
1913
14
1914
9
1915
14
1916
19
1917
26
1918
14
1919
9
1920
16
1921
12
1922
17
1923
22
1924
19
1925
24
1926
16
1927
5
1928
15
1929
12
1930
17
1931
36
1932
15
1933
22
1934
25
1935
11
1936
43
1937
10
1938
12
1939
11
1940
12
1941
7
1942
12
1943
7
1944
10
1945
17
1946
10
1947
13
1948
12
1949
12
1950
22
1951
18
1952
8
1953
17
1954
12
1955
8
1956
9
1957
7
1958
7
1959
11
1960
4
1961
1
1962
16
1963
11
1964
19
1965
14
1966
16
1967
12
1968
12
1969
14
1970
4
1971
7
1972
27
1973
12
1974
9
1975
13
1976
19
1977
16
1978
14
1979
13
1980
6
1981
8
1982
4
1983
17
1984
5
1985
13
1986
14
1987
7
1988
14
1989
16
1990
13
1991
20
1992
7
1994
6
1995
9
1996
5
1997
5
1998
20
1999
11
2000
18
2001
16
2002
11
2003
10
2004
8
2005
7
2006
11
2007
12
2008
5
2009
6
All-Time Record Progression
10 new records
10 all-time records were set at Winona between 28 June 1931 and 19 August 2007. Each dot is a new record.
When Winona set new all-time records
Date
Kind
Detail
1931-06-28
Record high maximum temperature
Record high maximum temperature 41.1 C (106.0 F)
1931-06-29
Record high minimum temperature
Record high minimum temperature 28.9 C (84.0 F)
1931-07-17
Record high minimum temperature
Record high minimum temperature 29.4 C (84.9 F)
1934-05-31
Record high maximum temperature
Record high maximum temperature 41.7 C (107.1 F)
1936-07-12
Record high maximum temperature
Record high maximum temperature 42.2 C (108.0 F)
1962-03-05
Record snow depth
Record snow depth 66.0 cm (26.0 in)
1969-01-08
Record snow depth
Record snow depth 68.6 cm (27.0 in)
1971-01-29
Record snow depth
Record snow depth 71.1 cm (28.0 in)
1971-01-30
Record snow depth
Record snow depth 81.3 cm (32.0 in)
2007-08-19
Record daily precipitation
Record daily precipitation 125.7 mm (4.9 in)
Wettest Day of Each Month
Aug: 125.7 mm (4.9 in)
The wettest day on record for each calendar month at Winona. The most was 125.7 mm (4.9 in) on 19 August 2007.
Record daily precipitation for each month at Winona
Month
Record daily precipitation (mm)
Date
Jan
57.2 mm (2.3 in)
22 January 1998
Feb
41.9 mm (1.6 in)
22 February 1922
Mar
50.8 mm (2.0 in)
25 March 1996
Apr
76.2 mm (3.0 in)
25 April 1994
May
97.3 mm (3.8 in)
1 May 1936
Jun
112.3 mm (4.4 in)
6 June 1914
Jul
109.2 mm (4.3 in)
1 July 1978
Aug
125.7 mm (4.9 in)
19 August 2007
Sep
94.0 mm (3.7 in)
16 September 1992
Oct
67.1 mm (2.6 in)
11 October 1986
Nov
87.6 mm (3.4 in)
8 November 1945
Dec
52.8 mm (2.1 in)
15 December 1996
Period of Record Coverage
1893 to 2009
Complete yearUnder 90 percent of days
113 years of record at Winona, 1893 to 2009. 16 years have data for under 90 percent of days and are left out of rankings: 1897, 1927, 1930, 1944, 1976, 1983, 1984, 1985 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 91 complete years at Winona, 1893 to 2008. Blue stripes are years cooler than the station's own mean of 8.2 C (46.7 F); red stripes are warmer. The coolest year was 1917, at 5.4 C (41.8 F), and the warmest was 1931, at 11.6 C (52.9 F). The strongest colour marks a difference of 3.5 C (6.3 F).
Annual mean temperature at Winona as warming stripes, 1893 to 2008
Year
Annual mean temperature
Difference from the station mean
1893
6.9 C
-1.26 C
1894
9.2 C
+1.06 C
1895
7.4 C
-0.79 C
1896
7.4 C
-0.79 C
1902
7.9 C
-0.31 C
1903
7.1 C
-1.11 C
1904
6.4 C
-1.75 C
1905
6.4 C
-1.77 C
1906
7.2 C
-0.95 C
1909
7.7 C
-0.43 C
1910
8.8 C
+0.60 C
1911
8.9 C
+0.77 C
1912
7.3 C
-0.83 C
1913
9.3 C
+1.11 C
1914
8.8 C
+0.65 C
1915
8.0 C
-0.16 C
1916
7.4 C
-0.82 C
1917
5.4 C
-2.74 C
1918
8.1 C
-0.09 C
1919
8.0 C
-0.15 C
1920
7.8 C
-0.34 C
1921
9.9 C
+1.70 C
1922
8.8 C
+0.61 C
1923
8.3 C
+0.16 C
1924
6.6 C
-1.60 C
1925
8.1 C
-0.10 C
1926
7.5 C
-0.70 C
1928
9.2 C
+1.04 C
1929
7.1 C
-1.08 C
1931
11.6 C
+3.46 C
1932
8.6 C
+0.43 C
1933
9.9 C
+1.70 C
1935
8.4 C
+0.20 C
1936
8.3 C
+0.11 C
1937
8.0 C
-0.14 C
1938
9.8 C
+1.64 C
1939
10.1 C
+1.97 C
1940
8.4 C
+0.21 C
1941
9.9 C
+1.68 C
1942
8.7 C
+0.50 C
1943
7.7 C
-0.49 C
1946
8.7 C
+0.50 C
1947
8.1 C
-0.12 C
1948
9.0 C
+0.83 C
1949
9.6 C
+1.40 C
1950
7.2 C
-0.98 C
1951
7.2 C
-0.98 C
1952
9.0 C
+0.79 C
1953
9.7 C
+1.56 C
1954
9.0 C
+0.81 C
1955
7.9 C
-0.29 C
1956
7.2 C
-1.01 C
1957
7.5 C
-0.69 C
1958
7.6 C
-0.56 C
1959
7.2 C
-0.95 C
1960
7.4 C
-0.80 C
1961
7.5 C
-0.70 C
1962
6.9 C
-1.26 C
1963
7.5 C
-0.65 C
1964
8.4 C
+0.23 C
1965
6.8 C
-1.38 C
1966
7.1 C
-1.09 C
1967
7.2 C
-0.97 C
1968
7.7 C
-0.47 C
1969
6.9 C
-1.23 C
1970
7.2 C
-0.94 C
1971
7.0 C
-1.14 C
1972
5.6 C
-2.56 C
1973
7.9 C
-0.31 C
1975
6.4 C
-1.73 C
1977
7.9 C
-0.31 C
1978
5.9 C
-2.25 C
1979
5.9 C
-2.30 C
1980
7.6 C
-0.62 C
1982
7.0 C
-1.20 C
1989
8.4 C
+0.26 C
1990
10.0 C
+1.80 C
1995
8.9 C
+0.71 C
1996
7.5 C
-0.63 C
1997
8.8 C
+0.65 C
1998
11.2 C
+3.06 C
1999
10.3 C
+2.10 C
2000
9.5 C
+1.31 C
2001
10.2 C
+2.04 C
2002
10.0 C
+1.80 C
2003
9.2 C
+1.04 C
2004
9.3 C
+1.12 C
2005
9.8 C
+1.62 C
2006
10.2 C
+2.05 C
2007
9.5 C
+1.28 C
2008
8.1 C
-0.07 C
The annual mean temperature here has risen by 0.08 C (0.00 to 0.16) per decade over 1893 to 2008. In Fahrenheit: 0.15 F (0.01 to 0.29) per decade. The slope is a straight line fitted to 91 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Winona
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.08 C (0.00 to 0.16) per decade
0.15 F (0.01 to 0.29) per decade
1893 to 2008
91
Rise
Mean daily maximum
0.11 C (0.04 to 0.18) per decade
0.2 F (0.1 to 0.3) per decade
1893 to 2008
91
Rise
Mean daily minimum
0.06 C (-0.04 to 0.16) per decade
0.1 F (-0.1 to 0.3) per decade
1893 to 2008
91
Not clearly different from zero
A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.
Extremes by Year
1893 to 2009
Yearly extremes at Winona: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
42.2 C (108.0 F)
1936
36.1 C (97.0 F)
113
Coldest night (TNn)
-37.2 C (-35.0 F)
1912
-29.4 C (-20.9 F)
113
Wettest day (Rx1day)
125.7 mm (4.9 in)
2007
55.4 mm (2.2 in)
113
Wettest five days (Rx5day)
274.3 mm (10.8 in)
2007
84.5 mm (3.3 in)
113
Longest dry spell (CDD)
52 days
1943
23 days
113
Hottest day (TXx)
The hottest day of the year at Winona, 1893 to 2009. The record is 42.2 C (108.0 F) in 1936, marked on the chart; the median year is 36.1 C (97.0 F).
Hottest day (TXx) at Winona by year
Year
Hottest day (TXx)
1893
36.7 C (98.1 F)
1894
39.4 C (102.9 F)
1895
35.0 C (95.0 F)
1896
35.6 C (96.1 F)
1897
15.0 C (59.0 F)
1902
32.2 C (90.0 F)
1903
31.7 C (89.1 F)
1904
33.3 C (91.9 F)
1905
34.4 C (93.9 F)
1906
32.8 C (91.0 F)
1907
35.0 C (95.0 F)
1908
35.6 C (96.1 F)
1909
36.7 C (98.1 F)
1910
38.9 C (102.0 F)
1911
40.6 C (105.1 F)
1912
36.1 C (97.0 F)
1913
38.3 C (100.9 F)
1914
35.6 C (96.1 F)
1915
32.8 C (91.0 F)
1916
36.7 C (98.1 F)
1917
36.1 C (97.0 F)
1918
36.1 C (97.0 F)
1919
36.7 C (98.1 F)
1920
34.4 C (93.9 F)
1921
37.8 C (100.0 F)
1922
38.9 C (102.0 F)
1923
38.3 C (100.9 F)
1924
33.3 C (91.9 F)
1925
37.2 C (99.0 F)
1926
37.2 C (99.0 F)
1927
37.2 C (99.0 F)
1928
35.6 C (96.1 F)
1929
35.0 C (95.0 F)
1930
31.1 C (88.0 F)
1931
41.1 C (106.0 F)
1932
38.9 C (102.0 F)
1933
40.0 C (104.0 F)
1934
41.7 C (107.1 F)
1935
36.7 C (98.1 F)
1936
42.2 C (108.0 F)
1937
36.7 C (98.1 F)
1938
35.0 C (95.0 F)
1939
37.8 C (100.0 F)
1940
39.4 C (102.9 F)
1941
35.0 C (95.0 F)
1942
36.7 C (98.1 F)
1943
37.8 C (100.0 F)
1944
26.1 C (79.0 F)
1945
38.9 C (102.0 F)
1946
35.6 C (96.1 F)
1947
37.2 C (99.0 F)
1948
39.4 C (102.9 F)
1949
38.3 C (100.9 F)
1950
35.6 C (96.1 F)
1951
35.0 C (95.0 F)
1952
36.1 C (97.0 F)
1953
39.4 C (102.9 F)
1954
36.7 C (98.1 F)
1955
37.8 C (100.0 F)
1956
36.7 C (98.1 F)
1957
35.0 C (95.0 F)
1958
34.4 C (93.9 F)
1959
35.0 C (95.0 F)
1960
34.4 C (93.9 F)
1961
34.4 C (93.9 F)
1962
32.8 C (91.0 F)
1963
37.8 C (100.0 F)
1964
38.9 C (102.0 F)
1965
36.1 C (97.0 F)
1966
36.7 C (98.1 F)
1967
35.0 C (95.0 F)
1968
35.6 C (96.1 F)
1969
34.4 C (93.9 F)
1970
36.7 C (98.1 F)
1971
35.6 C (96.1 F)
1972
36.1 C (97.0 F)
1973
37.2 C (99.0 F)
1974
39.4 C (102.9 F)
1975
35.6 C (96.1 F)
1976
36.7 C (98.1 F)
1977
37.2 C (99.0 F)
1978
37.8 C (100.0 F)
1979
33.3 C (91.9 F)
1980
37.8 C (100.0 F)
1981
32.8 C (91.0 F)
1982
37.2 C (99.0 F)
1983
38.3 C (100.9 F)
1984
33.9 C (93.0 F)
1985
38.9 C (102.0 F)
1986
35.6 C (96.1 F)
1987
38.9 C (102.0 F)
1988
40.0 C (104.0 F)
1989
36.7 C (98.1 F)
1990
37.8 C (100.0 F)
1991
36.7 C (98.1 F)
1992
32.8 C (91.0 F)
1993
33.9 C (93.0 F)
1994
34.4 C (93.9 F)
1995
40.0 C (104.0 F)
1996
35.6 C (96.1 F)
1997
34.4 C (93.9 F)
1998
33.9 C (93.0 F)
1999
37.2 C (99.0 F)
2000
33.9 C (93.0 F)
2001
37.2 C (99.0 F)
2002
36.1 C (97.0 F)
2003
36.7 C (98.1 F)
2004
33.3 C (91.9 F)
2005
35.0 C (95.0 F)
2006
37.2 C (99.0 F)
2007
35.0 C (95.0 F)
2008
32.8 C (91.0 F)
2009
35.6 C (96.1 F)
Coldest night (TNn)
The coldest night of the year at Winona, 1893 to 2009. The record is -37.2 C (-35.0 F) in 1912, marked on the chart; the median year is -29.4 C (-20.9 F).
Coldest night (TNn) at Winona by year
Year
Coldest night (TNn)
1893
-32.8 C (-27.0 F)
1894
-27.2 C (-17.0 F)
1895
-30.6 C (-23.1 F)
1896
-26.7 C (-16.1 F)
1897
-30.0 C (-22.0 F)
1902
-33.3 C (-27.9 F)
1903
-29.4 C (-20.9 F)
1904
-34.4 C (-29.9 F)
1905
-33.3 C (-27.9 F)
1906
-32.8 C (-27.0 F)
1907
-32.8 C (-27.0 F)
1908
-26.7 C (-16.1 F)
1909
-31.1 C (-24.0 F)
1910
-30.6 C (-23.1 F)
1911
-31.7 C (-25.1 F)
1912
-37.2 C (-35.0 F)
1913
-27.2 C (-17.0 F)
1914
-31.7 C (-25.1 F)
1915
-36.1 C (-33.0 F)
1916
-32.8 C (-27.0 F)
1917
-35.0 C (-31.0 F)
1918
-36.1 C (-33.0 F)
1919
-34.4 C (-29.9 F)
1920
-27.8 C (-18.0 F)
1921
-25.0 C (-13.0 F)
1922
-33.3 C (-27.9 F)
1923
-30.6 C (-23.1 F)
1924
-33.9 C (-29.0 F)
1925
-34.4 C (-29.9 F)
1926
-27.2 C (-17.0 F)
1927
-31.7 C (-25.1 F)
1928
-28.3 C (-18.9 F)
1929
-33.9 C (-29.0 F)
1930
-33.3 C (-27.9 F)
1931
-20.0 C (-4.0 F)
1932
-27.2 C (-17.0 F)
1933
-30.6 C (-23.1 F)
1934
-26.1 C (-15.0 F)
1935
-34.4 C (-29.9 F)
1936
-33.9 C (-29.0 F)
1937
-31.7 C (-25.1 F)
1938
-23.9 C (-11.0 F)
1939
-25.6 C (-14.1 F)
1940
-28.3 C (-18.9 F)
1941
-26.7 C (-16.1 F)
1942
-28.9 C (-20.0 F)
1943
-30.6 C (-23.1 F)
1944
-22.8 C (-9.0 F)
1945
-25.6 C (-14.1 F)
1946
-30.0 C (-22.0 F)
1947
-29.4 C (-20.9 F)
1948
-27.8 C (-18.0 F)
1949
-26.7 C (-16.1 F)
1950
-31.1 C (-24.0 F)
1951
-35.6 C (-32.1 F)
1952
-28.9 C (-20.0 F)
1953
-22.2 C (-8.0 F)
1954
-29.4 C (-20.9 F)
1955
-27.2 C (-17.0 F)
1956
-27.2 C (-17.0 F)
1957
-28.9 C (-20.0 F)
1958
-26.7 C (-16.1 F)
1959
-28.9 C (-20.0 F)
1960
-25.0 C (-13.0 F)
1961
-26.1 C (-15.0 F)
1962
-33.3 C (-27.9 F)
1963
-35.0 C (-31.0 F)
1964
-24.4 C (-11.9 F)
1965
-31.1 C (-24.0 F)
1966
-32.2 C (-26.0 F)
1967
-33.3 C (-27.9 F)
1968
-27.2 C (-17.0 F)
1969
-27.2 C (-17.0 F)
1970
-33.3 C (-27.9 F)
1971
-32.8 C (-27.0 F)
1972
-33.3 C (-27.9 F)
1973
-31.7 C (-25.1 F)
1974
-31.7 C (-25.1 F)
1975
-29.4 C (-20.9 F)
1976
-32.8 C (-27.0 F)
1977
-33.3 C (-27.9 F)
1978
-28.3 C (-18.9 F)
1979
-35.0 C (-31.0 F)
1980
-23.9 C (-11.0 F)
1981
-32.8 C (-27.0 F)
1982
-33.3 C (-27.9 F)
1983
-33.3 C (-27.9 F)
1984
-28.3 C (-18.9 F)
1985
-33.3 C (-27.9 F)
1986
-28.9 C (-20.0 F)
1987
-26.1 C (-15.0 F)
1988
-25.6 C (-14.1 F)
1989
-30.0 C (-22.0 F)
1990
-27.2 C (-17.0 F)
1991
-25.6 C (-14.1 F)
1992
-25.0 C (-13.0 F)
1993
-23.3 C (-9.9 F)
1994
-33.3 C (-27.9 F)
1995
-23.3 C (-9.9 F)
1996
-35.0 C (-31.0 F)
1997
-25.6 C (-14.1 F)
1998
-22.8 C (-9.0 F)
1999
-26.7 C (-16.1 F)
2000
-30.6 C (-23.1 F)
2001
-23.3 C (-9.9 F)
2002
-20.6 C (-5.1 F)
2003
-23.3 C (-9.9 F)
2004
-27.2 C (-17.0 F)
2005
-23.3 C (-9.9 F)
2006
-27.8 C (-18.0 F)
2007
-27.2 C (-17.0 F)
2008
-26.7 C (-16.1 F)
2009
-32.2 C (-26.0 F)
Wettest day (Rx1day)
The wettest day of the year at Winona, 1893 to 2009. The record is 125.7 mm (4.9 in) in 2007, marked on the chart; the median year is 55.4 mm (2.2 in).
Wettest day (Rx1day) at Winona by year
Year
Wettest day (Rx1day)
1893
39.6 mm (1.6 in)
1894
40.9 mm (1.6 in)
1895
54.6 mm (2.1 in)
1896
65.8 mm (2.6 in)
1897
22.4 mm (0.9 in)
1902
52.8 mm (2.1 in)
1903
51.6 mm (2.0 in)
1904
40.9 mm (1.6 in)
1905
76.2 mm (3.0 in)
1906
53.3 mm (2.1 in)
1907
71.1 mm (2.8 in)
1908
65.0 mm (2.6 in)
1909
86.9 mm (3.4 in)
1910
53.6 mm (2.1 in)
1911
71.9 mm (2.8 in)
1912
46.7 mm (1.8 in)
1913
47.2 mm (1.9 in)
1914
112.3 mm (4.4 in)
1915
63.0 mm (2.5 in)
1916
66.5 mm (2.6 in)
1917
37.8 mm (1.5 in)
1918
44.2 mm (1.7 in)
1919
43.2 mm (1.7 in)
1920
71.1 mm (2.8 in)
1921
53.1 mm (2.1 in)
1922
41.9 mm (1.6 in)
1923
50.8 mm (2.0 in)
1924
70.6 mm (2.8 in)
1925
70.6 mm (2.8 in)
1926
44.2 mm (1.7 in)
1927
26.2 mm (1.0 in)
1928
74.7 mm (2.9 in)
1929
35.3 mm (1.4 in)
1930
56.4 mm (2.2 in)
1931
39.6 mm (1.6 in)
1932
46.5 mm (1.8 in)
1933
48.5 mm (1.9 in)
1934
57.9 mm (2.3 in)
1935
55.4 mm (2.2 in)
1936
97.3 mm (3.8 in)
1937
72.6 mm (2.9 in)
1938
63.8 mm (2.5 in)
1939
51.3 mm (2.0 in)
1940
40.1 mm (1.6 in)
1941
52.3 mm (2.1 in)
1942
79.0 mm (3.1 in)
1943
41.7 mm (1.6 in)
1944
61.0 mm (2.4 in)
1945
87.6 mm (3.4 in)
1946
50.0 mm (2.0 in)
1947
52.3 mm (2.1 in)
1948
55.1 mm (2.2 in)
1949
57.4 mm (2.3 in)
1950
55.4 mm (2.2 in)
1951
87.9 mm (3.5 in)
1952
69.6 mm (2.7 in)
1953
37.3 mm (1.5 in)
1954
48.0 mm (1.9 in)
1955
69.3 mm (2.7 in)
1956
71.1 mm (2.8 in)
1957
56.9 mm (2.2 in)
1958
49.0 mm (1.9 in)
1959
40.1 mm (1.6 in)
1960
46.0 mm (1.8 in)
1961
81.5 mm (3.2 in)
1962
69.1 mm (2.7 in)
1963
32.3 mm (1.3 in)
1964
47.2 mm (1.9 in)
1965
69.3 mm (2.7 in)
1966
45.5 mm (1.8 in)
1967
47.0 mm (1.9 in)
1968
90.2 mm (3.6 in)
1969
45.5 mm (1.8 in)
1970
43.9 mm (1.7 in)
1971
57.4 mm (2.3 in)
1972
107.2 mm (4.2 in)
1973
69.9 mm (2.8 in)
1974
47.8 mm (1.9 in)
1975
60.2 mm (2.4 in)
1976
27.9 mm (1.1 in)
1977
58.4 mm (2.3 in)
1978
109.2 mm (4.3 in)
1979
41.1 mm (1.6 in)
1980
58.9 mm (2.3 in)
1981
56.1 mm (2.2 in)
1982
51.8 mm (2.0 in)
1983
36.6 mm (1.4 in)
1984
54.1 mm (2.1 in)
1985
44.2 mm (1.7 in)
1986
82.6 mm (3.3 in)
1987
37.3 mm (1.5 in)
1988
43.2 mm (1.7 in)
1989
58.4 mm (2.3 in)
1990
58.4 mm (2.3 in)
1991
83.3 mm (3.3 in)
1992
94.0 mm (3.7 in)
1993
68.6 mm (2.7 in)
1994
76.2 mm (3.0 in)
1995
76.2 mm (3.0 in)
1996
52.8 mm (2.1 in)
1997
58.4 mm (2.3 in)
1998
86.4 mm (3.4 in)
1999
76.2 mm (3.0 in)
2000
69.3 mm (2.7 in)
2001
64.5 mm (2.5 in)
2002
69.6 mm (2.7 in)
2003
49.8 mm (2.0 in)
2004
74.4 mm (2.9 in)
2005
54.4 mm (2.1 in)
2006
33.5 mm (1.3 in)
2007
125.7 mm (4.9 in)
2008
50.3 mm (2.0 in)
2009
49.8 mm (2.0 in)
Wettest five days (Rx5day)
The wettest five days of the year at Winona, 1893 to 2009. The record is 274.3 mm (10.8 in) in 2007, marked on the chart; the median year is 84.5 mm (3.3 in).
Wettest five days (Rx5day) at Winona by year
Year
Wettest five days (Rx5day)
1893
59.7 mm (2.4 in)
1894
46.0 mm (1.8 in)
1895
122.6 mm (4.8 in)
1896
82.3 mm (3.2 in)
1897
31.8 mm (1.3 in)
1902
84.1 mm (3.3 in)
1903
114.3 mm (4.5 in)
1904
86.8 mm (3.4 in)
1905
136.0 mm (5.4 in)
1906
69.0 mm (2.7 in)
1907
133.1 mm (5.2 in)
1908
96.2 mm (3.8 in)
1909
156.6 mm (6.2 in)
1910
53.9 mm (2.1 in)
1911
93.0 mm (3.7 in)
1912
102.0 mm (4.0 in)
1913
83.8 mm (3.3 in)
1914
142.3 mm (5.6 in)
1915
76.0 mm (3.0 in)
1916
105.2 mm (4.1 in)
1917
67.8 mm (2.7 in)
1918
55.4 mm (2.2 in)
1919
51.6 mm (2.0 in)
1920
141.5 mm (5.6 in)
1921
74.2 mm (2.9 in)
1922
77.0 mm (3.0 in)
1923
66.1 mm (2.6 in)
1924
94.9 mm (3.7 in)
1925
155.2 mm (6.1 in)
1926
81.3 mm (3.2 in)
1927
42.9 mm (1.7 in)
1928
99.3 mm (3.9 in)
1929
55.9 mm (2.2 in)
1930
97.8 mm (3.9 in)
1931
70.1 mm (2.8 in)
1932
55.4 mm (2.2 in)
1933
74.7 mm (2.9 in)
1934
76.2 mm (3.0 in)
1935
76.5 mm (3.0 in)
1936
108.2 mm (4.3 in)
1937
72.6 mm (2.9 in)
1938
144.3 mm (5.7 in)
1939
86.5 mm (3.4 in)
1940
78.3 mm (3.1 in)
1941
67.5 mm (2.7 in)
1942
147.6 mm (5.8 in)
1943
56.7 mm (2.2 in)
1944
76.3 mm (3.0 in)
1945
96.6 mm (3.8 in)
1946
70.3 mm (2.8 in)
1947
95.0 mm (3.7 in)
1948
65.5 mm (2.6 in)
1949
77.2 mm (3.0 in)
1950
79.3 mm (3.1 in)
1951
88.4 mm (3.5 in)
1952
96.2 mm (3.8 in)
1953
83.1 mm (3.3 in)
1954
92.4 mm (3.6 in)
1955
84.5 mm (3.3 in)
1956
98.9 mm (3.9 in)
1957
76.8 mm (3.0 in)
1958
49.0 mm (1.9 in)
1959
69.5 mm (2.7 in)
1960
84.3 mm (3.3 in)
1961
81.5 mm (3.2 in)
1962
133.4 mm (5.3 in)
1963
56.9 mm (2.2 in)
1964
87.6 mm (3.4 in)
1965
114.1 mm (4.5 in)
1966
68.8 mm (2.7 in)
1967
85.6 mm (3.4 in)
1968
120.6 mm (4.7 in)
1969
108.7 mm (4.3 in)
1970
66.3 mm (2.6 in)
1971
73.1 mm (2.9 in)
1972
133.1 mm (5.2 in)
1973
101.3 mm (4.0 in)
1974
78.5 mm (3.1 in)
1975
103.9 mm (4.1 in)
1976
50.5 mm (2.0 in)
1977
66.5 mm (2.6 in)
1978
137.9 mm (5.4 in)
1979
90.6 mm (3.6 in)
1980
94.3 mm (3.7 in)
1981
119.9 mm (4.7 in)
1982
96.7 mm (3.8 in)
1983
86.4 mm (3.4 in)
1984
75.9 mm (3.0 in)
1985
45.8 mm (1.8 in)
1986
132.9 mm (5.2 in)
1987
63.7 mm (2.5 in)
1988
50.8 mm (2.0 in)
1989
80.5 mm (3.2 in)
1990
109.0 mm (4.3 in)
1991
100.4 mm (4.0 in)
1992
161.3 mm (6.4 in)
1993
121.2 mm (4.8 in)
1994
120.2 mm (4.7 in)
1995
78.7 mm (3.1 in)
1996
76.2 mm (3.0 in)
1997
86.4 mm (3.4 in)
1998
172.8 mm (6.8 in)
1999
109.2 mm (4.3 in)
2000
118.8 mm (4.7 in)
2001
86.1 mm (3.4 in)
2002
74.2 mm (2.9 in)
2003
57.5 mm (2.3 in)
2004
126.7 mm (5.0 in)
2005
84.6 mm (3.3 in)
2006
52.6 mm (2.1 in)
2007
274.3 mm (10.8 in)
2008
90.2 mm (3.6 in)
2009
73.7 mm (2.9 in)
Longest dry spell (CDD)
The longest dry spell of the year at Winona, 1893 to 2009. The record is 52 days in 1943, marked on the chart; the median year is 23 days.
Longest dry spell (CDD) at Winona by year
Year
Longest dry spell (CDD)
1893
26 days
1894
31 days
1895
15 days
1896
23 days
1897
9 days
1902
19 days
1903
48 days
1904
31 days
1905
21 days
1906
23 days
1907
20 days
1908
30 days
1909
29 days
1910
36 days
1911
27 days
1912
21 days
1913
25 days
1914
20 days
1915
28 days
1916
20 days
1917
23 days
1918
22 days
1919
25 days
1920
18 days
1921
14 days
1922
16 days
1923
26 days
1924
18 days
1925
23 days
1926
14 days
1927
14 days
1928
18 days
1929
22 days
1930
18 days
1931
38 days
1932
22 days
1933
26 days
1934
33 days
1935
28 days
1936
27 days
1937
24 days
1938
21 days
1939
21 days
1940
20 days
1941
20 days
1942
38 days
1943
52 days
1944
26 days
1945
25 days
1946
32 days
1947
39 days
1948
20 days
1949
34 days
1950
24 days
1951
20 days
1952
30 days
1953
31 days
1954
22 days
1955
22 days
1956
21 days
1957
29 days
1958
29 days
1959
18 days
1960
26 days
1961
22 days
1962
38 days
1963
22 days
1964
43 days
1965
17 days
1966
27 days
1967
23 days
1968
32 days
1969
26 days
1970
28 days
1971
13 days
1972
27 days
1973
17 days
1974
14 days
1975
17 days
1976
16 days
1977
18 days
1978
20 days
1979
17 days
1980
32 days
1981
25 days
1982
33 days
1983
17 days
1984
15 days
1985
15 days
1986
23 days
1987
29 days
1988
18 days
1989
18 days
1990
17 days
1991
20 days
1992
23 days
1993
16 days
1994
14 days
1995
25 days
1996
24 days
1997
17 days
1998
31 days
1999
24 days
2000
14 days
2001
25 days
2002
15 days
2003
24 days
2004
20 days
2005
15 days
2006
25 days
2007
28 days
2008
16 days
2009
31 days
Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.
Frost Dates and Growing Season
91 years with a frost
Across 91 years with a frost, the median last spring frost at Winona falls on 28 April and the median first autumn frost on 7 October, which leaves a median of 163 days between them.
In 1966 to 2008 the median growing season was 169 days. That is 9 days more than in 1893 to 1931.
Fitted over all years, the growing season changes by +1.3 days per decade at this station.
Frost dates and growing season at Winona
Measure
Median, all years
Earliest period (1893 to 1931)
Recent period (1966 to 2008)
Recent against earliest
Fitted trend
Last spring frost
28 April
2 May
26 April
6 days earlier
-0.6 days per decade
First autumn frost
7 October
7 October
8 October
1 day later
+0.7 days per decade
Growing days
163 days
160 days
169 days
9 days more
+1.3 days per decade
A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.
Rainfall Return Levels
93 years, 1895 to 2008
A day with at least 56.9 mm (2.2 in) of rain is expected about once in 2 years. A day with at least 124.9 mm (4.9 in) of rain is expected about once in 100 years.
Rainfall return levels at Winona: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
56.9 mm (2.2 in)
5 years
73.2 mm (2.9 in)
10 years
84.7 mm (3.3 in)
25 years
100.1 mm (3.9 in)
50 years
112.2 mm (4.4 in)
100 years
124.9 mm (4.9 in)
Longer than the 93 years of record
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 93 years of values from 1895 to 2008.
A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.
The largest wettest-day totals in the fit: 125.7 mm (4.9 in) in 2007; 112.3 mm (4.4 in) in 1914; 109.2 mm (4.3 in) in 1978.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Winona standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Winona threshold days by year: CSV or JSON. Field meanings are on the data page.
Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-14 (14 October 2026). Records are computed by this site and are not official.