Record envelope, standing records and threshold days for Winona (USC00148988), Kansas, United States, with 134 years of record.
Key Facts for Winona
Winona (USC00148988) is a weather station in Kansas, United States at 39.06 latitude and -101.24 longitude, 1,013 m (3,323 ft) above sea level.
The station reports from 1893 to 2026, 134 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 precipitation of 8.9 mm (0.35 in) on 14 February 2026.
About the Station
Location: Kansas, United States, 39.06 latitude, -101.24 longitude.
Elevation: 1,013 m (3,323 ft).
Period of record: 1893 to 2026, 134 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
31.1 C (88.0 F)
-27.2 C (-17.0 F)
n/a
n/a
Feb
27.8 C (82.0 F)
-28.3 C (-18.9 F)
n/a
n/a
Mar
31.7 C (89.1 F)
-23.3 C (-9.9 F)
n/a
n/a
Apr
36.1 C (97.0 F)
-13.9 C (7.0 F)
n/a
n/a
May
39.4 C (102.9 F)
-6.1 C (21.0 F)
n/a
n/a
Jun
42.8 C (109.0 F)
2.2 C (36.0 F)
n/a
n/a
Jul
43.3 C (109.9 F)
7.2 C (45.0 F)
n/a
n/a
Aug
42.8 C (109.0 F)
5.0 C (41.0 F)
n/a
n/a
Sep
40.0 C (104.0 F)
-5.0 C (23.0 F)
n/a
n/a
Oct
36.1 C (97.0 F)
-12.8 C (9.0 F)
n/a
n/a
Nov
30.6 C (87.1 F)
-19.4 C (-2.9 F)
n/a
n/a
Dec
30.0 C (86.0 F)
-27.8 C (-18.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Winona still stand. 1966 holds the most, with 45.
Standing records at Winona by the year they were set
Year set
Standing records
1962
28
1963
39
1964
40
1965
32
1966
45
1967
36
1968
32
1969
33
1970
39
1971
36
1972
40
1973
24
1974
24
1975
1
1976
9
1977
22
1978
43
1979
27
1980
40
1981
28
1982
15
1983
43
1984
25
1985
30
1986
32
1987
24
1988
24
1989
30
1990
37
1991
27
1992
26
1993
31
1994
34
1995
40
1996
32
1997
30
1998
22
1999
23
2000
33
2001
18
2002
29
2003
40
2004
29
2005
37
2006
35
2007
41
2008
24
2009
24
2010
11
All-Time Record Progression
4 new records
4 all-time records were set at Winona between 26 October 1997 and 29 June 2014. Each dot is a new record.
When Winona set new all-time records
Date
Kind
Detail
1997-10-26
Record daily snowfall
Record daily snowfall 50.8 cm (20.0 in)
1997-10-26
Record snow depth
Record snow depth 50.8 cm (20.0 in)
2013-08-02
Record daily precipitation
Record daily precipitation 101.3 mm (4.0 in)
2014-06-29
Record daily precipitation
Record daily precipitation 144.0 mm (5.7 in)
Wettest Day of Each Month
Jun: 144.0 mm (5.7 in)
The wettest day on record for each calendar month at Winona. The most was 144.0 mm (5.7 in) on 29 June 2014.
Record daily precipitation for each month at Winona
Month
Record daily precipitation (mm)
Date
Jan
31.2 mm (1.2 in)
14 January 1960
Feb
24.4 mm (1.0 in)
24 February 2020
Mar
45.7 mm (1.8 in)
28 March 1980
Apr
63.8 mm (2.5 in)
6 April 2005
May
74.4 mm (2.9 in)
1 May 2017
Jun
144.0 mm (5.7 in)
29 June 2014
Jul
78.7 mm (3.1 in)
10 July 1998
Aug
101.3 mm (4.0 in)
2 August 2013
Sep
96.5 mm (3.8 in)
13 September 2013
Oct
76.2 mm (3.0 in)
26 October 1897
Nov
42.2 mm (1.7 in)
18 November 2015
Dec
45.7 mm (1.8 in)
30 December 2006
Period of Record Coverage
1962 to 2010
Complete yearUnder 90 percent of days
49 years of record at Winona, 1962 to 2010. 10 years have data for under 90 percent of days and are left out of rankings: 1962, 1963, 1975, 1976, 1989, 1990, 1991, 2001 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 34 complete years at Winona, 1964 to 2009. Blue stripes are years cooler than the station's own mean of 11.1 C (52.0 F); red stripes are warmer. The coolest year was 1993, at 9.3 C (48.7 F), and the warmest was 1986, at 13.0 C (55.4 F). The strongest colour marks a difference of 1.9 C (3.4 F).
Annual mean temperature at Winona as warming stripes, 1964 to 2009
Year
Annual mean temperature
Difference from the station mean
1964
11.1 C
-0.03 C
1966
10.4 C
-0.69 C
1967
10.9 C
-0.24 C
1968
10.6 C
-0.52 C
1969
10.2 C
-0.89 C
1970
10.6 C
-0.57 C
1971
10.9 C
-0.27 C
1972
10.4 C
-0.71 C
1973
10.8 C
-0.31 C
1977
12.0 C
+0.88 C
1978
10.3 C
-0.88 C
1979
10.6 C
-0.50 C
1980
11.4 C
+0.26 C
1981
12.2 C
+1.03 C
1982
10.5 C
-0.59 C
1983
10.8 C
-0.33 C
1984
10.8 C
-0.29 C
1985
11.0 C
-0.14 C
1986
13.0 C
+1.87 C
1987
11.9 C
+0.72 C
1988
11.5 C
+0.40 C
1992
10.6 C
-0.49 C
1993
9.3 C
-1.84 C
1994
11.7 C
+0.59 C
1995
10.9 C
-0.23 C
1996
10.4 C
-0.74 C
1997
10.7 C
-0.47 C
1998
11.8 C
+0.63 C
1999
12.2 C
+1.05 C
2000
11.7 C
+0.60 C
2002
11.7 C
+0.60 C
2007
12.0 C
+0.91 C
2008
11.8 C
+0.62 C
2009
11.8 C
+0.68 C
The annual mean temperature here has risen by 0.24 C (0.05 to 0.43) per decade over 1964 to 2009. In Fahrenheit: 0.4 F (0.1 to 0.8) per decade. The slope is a straight line fitted to 34 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
0.24 C (0.05 to 0.43) per decade
0.4 F (0.1 to 0.8) per decade
1964 to 2009
34
Rise
Mean daily maximum
0.1 C (-0.2 to 0.3) per decade
0.1 F (-0.4 to 0.6) per decade
1964 to 2009
34
Not clearly different from zero
Mean daily minimum
0.4 C (0.3 to 0.6) per decade
0.7 F (0.5 to 1.0) per decade
1964 to 2009
34
Rise
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 2026
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)
43.3 C (109.9 F)
1973
40.0 C (104.0 F)
49
Coldest night (TNn)
-28.3 C (-18.9 F)
1982
-22.2 C (-8.0 F)
49
Wettest day (Rx1day)
144.0 mm (5.7 in)
2014
46.4 mm (1.8 in)
86
Wettest five days (Rx5day)
192.0 mm (7.6 in)
2014
74.0 mm (2.9 in)
86
Longest dry spell (CDD)
122 days
1894
44 days
86
Hottest day (TXx)
The hottest day of the year at Winona, 1893 to 2026. The record is 43.3 C (109.9 F) in 1973, marked on the chart; the median year is 40.0 C (104.0 F).
Hottest day (TXx) at Winona by year
Year
Hottest day (TXx)
1893
n/a
1894
n/a
1895
n/a
1896
n/a
1897
n/a
1898
n/a
1899
n/a
1900
n/a
1948
n/a
1949
n/a
1950
n/a
1951
n/a
1952
n/a
1953
n/a
1954
n/a
1955
n/a
1956
n/a
1957
n/a
1958
n/a
1959
n/a
1960
n/a
1961
n/a
1962
40.6 C (105.1 F)
1963
41.1 C (106.0 F)
1964
42.8 C (109.0 F)
1965
38.3 C (100.9 F)
1966
40.0 C (104.0 F)
1967
40.0 C (104.0 F)
1968
40.6 C (105.1 F)
1969
40.6 C (105.1 F)
1970
40.6 C (105.1 F)
1971
42.8 C (109.0 F)
1972
38.3 C (100.9 F)
1973
43.3 C (109.9 F)
1974
41.1 C (106.0 F)
1975
18.9 C (66.0 F)
1976
38.9 C (102.0 F)
1977
38.9 C (102.0 F)
1978
41.1 C (106.0 F)
1979
40.0 C (104.0 F)
1980
41.7 C (107.1 F)
1981
40.0 C (104.0 F)
1982
37.8 C (100.0 F)
1983
41.1 C (106.0 F)
1984
40.0 C (104.0 F)
1985
42.2 C (108.0 F)
1986
41.7 C (107.1 F)
1987
40.6 C (105.1 F)
1988
40.0 C (104.0 F)
1989
38.3 C (100.9 F)
1990
42.2 C (108.0 F)
1991
34.4 C (93.9 F)
1992
36.7 C (98.1 F)
1993
39.4 C (102.9 F)
1994
41.1 C (106.0 F)
1995
40.0 C (104.0 F)
1996
38.9 C (102.0 F)
1997
37.8 C (100.0 F)
1998
38.9 C (102.0 F)
1999
37.8 C (100.0 F)
2000
39.4 C (102.9 F)
2001
39.4 C (102.9 F)
2002
41.1 C (106.0 F)
2003
40.0 C (104.0 F)
2004
38.3 C (100.9 F)
2005
42.2 C (108.0 F)
2006
40.6 C (105.1 F)
2007
40.6 C (105.1 F)
2008
40.6 C (105.1 F)
2009
37.8 C (100.0 F)
2010
40.6 C (105.1 F)
2011
n/a
2012
n/a
2013
n/a
2014
n/a
2015
n/a
2016
n/a
2017
n/a
2018
n/a
2019
n/a
2020
n/a
2021
n/a
2022
n/a
2023
n/a
2024
n/a
2025
n/a
2026
n/a
Coldest night (TNn)
The coldest night of the year at Winona, 1893 to 2026. The record is -28.3 C (-18.9 F) in 1982, marked on the chart; the median year is -22.2 C (-8.0 F).
Coldest night (TNn) at Winona by year
Year
Coldest night (TNn)
1893
n/a
1894
n/a
1895
n/a
1896
n/a
1897
n/a
1898
n/a
1899
n/a
1900
n/a
1948
n/a
1949
n/a
1950
n/a
1951
n/a
1952
n/a
1953
n/a
1954
n/a
1955
n/a
1956
n/a
1957
n/a
1958
n/a
1959
n/a
1960
n/a
1961
n/a
1962
-18.9 C (-2.0 F)
1963
-27.2 C (-17.0 F)
1964
-22.8 C (-9.0 F)
1965
-22.8 C (-9.0 F)
1966
-23.3 C (-9.9 F)
1967
-19.4 C (-2.9 F)
1968
-22.2 C (-8.0 F)
1969
-19.4 C (-2.9 F)
1970
-21.7 C (-7.1 F)
1971
-23.3 C (-9.9 F)
1972
-24.4 C (-11.9 F)
1973
-22.8 C (-9.0 F)
1974
-26.7 C (-16.1 F)
1975
-18.3 C (-0.9 F)
1976
-19.4 C (-2.9 F)
1977
-21.1 C (-6.0 F)
1978
-23.3 C (-9.9 F)
1979
-24.4 C (-11.9 F)
1980
-20.6 C (-5.1 F)
1981
-25.6 C (-14.1 F)
1982
-28.3 C (-18.9 F)
1983
-26.7 C (-16.1 F)
1984
-27.2 C (-17.0 F)
1985
-21.1 C (-6.0 F)
1986
-21.7 C (-7.1 F)
1987
-17.2 C (1.0 F)
1988
-21.7 C (-7.1 F)
1989
-26.7 C (-16.1 F)
1990
-27.8 C (-18.0 F)
1991
-18.3 C (-0.9 F)
1992
-16.7 C (1.9 F)
1993
-24.4 C (-11.9 F)
1994
-20.6 C (-5.1 F)
1995
-23.3 C (-9.9 F)
1996
-25.0 C (-13.0 F)
1997
-22.2 C (-8.0 F)
1998
-24.4 C (-11.9 F)
1999
-18.9 C (-2.0 F)
2000
-17.8 C (0.0 F)
2001
-17.2 C (1.0 F)
2002
-19.4 C (-2.9 F)
2003
-20.0 C (-4.0 F)
2004
-23.9 C (-11.0 F)
2005
-24.4 C (-11.9 F)
2006
-20.0 C (-4.0 F)
2007
-22.2 C (-8.0 F)
2008
-18.9 C (-2.0 F)
2009
-18.9 C (-2.0 F)
2010
-18.9 C (-2.0 F)
2011
n/a
2012
n/a
2013
n/a
2014
n/a
2015
n/a
2016
n/a
2017
n/a
2018
n/a
2019
n/a
2020
n/a
2021
n/a
2022
n/a
2023
n/a
2024
n/a
2025
n/a
2026
n/a
Wettest day (Rx1day)
The wettest day of the year at Winona, 1893 to 2026. The record is 144.0 mm (5.7 in) in 2014, marked on the chart; the median year is 46.4 mm (1.8 in).
Wettest day (Rx1day) at Winona by year
Year
Wettest day (Rx1day)
1893
44.5 mm (1.8 in)
1894
63.5 mm (2.5 in)
1895
88.9 mm (3.5 in)
1896
50.8 mm (2.0 in)
1897
76.2 mm (3.0 in)
1898
50.8 mm (2.0 in)
1899
50.8 mm (2.0 in)
1900
76.2 mm (3.0 in)
1948
26.2 mm (1.0 in)
1949
66.3 mm (2.6 in)
1950
64.0 mm (2.5 in)
1951
81.8 mm (3.2 in)
1952
18.3 mm (0.7 in)
1953
39.4 mm (1.6 in)
1954
36.6 mm (1.4 in)
1955
46.2 mm (1.8 in)
1956
34.5 mm (1.4 in)
1957
35.1 mm (1.4 in)
1958
31.2 mm (1.2 in)
1959
45.0 mm (1.8 in)
1960
36.3 mm (1.4 in)
1961
40.1 mm (1.6 in)
1962
79.2 mm (3.1 in)
1963
44.5 mm (1.8 in)
1964
63.2 mm (2.5 in)
1965
46.5 mm (1.8 in)
1966
41.4 mm (1.6 in)
1967
38.1 mm (1.5 in)
1968
47.0 mm (1.9 in)
1969
42.2 mm (1.7 in)
1970
48.3 mm (1.9 in)
1971
31.8 mm (1.3 in)
1972
77.0 mm (3.0 in)
1973
30.5 mm (1.2 in)
1974
68.6 mm (2.7 in)
1975
n/a
1976
45.5 mm (1.8 in)
1977
50.8 mm (2.0 in)
1978
37.6 mm (1.5 in)
1979
52.1 mm (2.1 in)
1980
66.0 mm (2.6 in)
1981
40.1 mm (1.6 in)
1982
37.3 mm (1.5 in)
1983
33.8 mm (1.3 in)
1984
54.6 mm (2.1 in)
1985
50.8 mm (2.0 in)
1986
33.0 mm (1.3 in)
1987
44.5 mm (1.8 in)
1988
64.0 mm (2.5 in)
1989
49.8 mm (2.0 in)
1990
35.6 mm (1.4 in)
1991
35.3 mm (1.4 in)
1992
39.6 mm (1.6 in)
1993
50.8 mm (2.0 in)
1994
45.7 mm (1.8 in)
1995
64.5 mm (2.5 in)
1996
87.9 mm (3.5 in)
1997
35.8 mm (1.4 in)
1998
78.7 mm (3.1 in)
1999
70.1 mm (2.8 in)
2000
57.2 mm (2.3 in)
2001
41.7 mm (1.6 in)
2002
39.4 mm (1.6 in)
2003
26.4 mm (1.0 in)
2004
33.5 mm (1.3 in)
2005
63.8 mm (2.5 in)
2006
45.7 mm (1.8 in)
2007
49.5 mm (1.9 in)
2008
26.4 mm (1.0 in)
2009
42.7 mm (1.7 in)
2010
33.8 mm (1.3 in)
2011
66.3 mm (2.6 in)
2012
40.6 mm (1.6 in)
2013
101.3 mm (4.0 in)
2014
144.0 mm (5.7 in)
2015
62.0 mm (2.4 in)
2016
34.3 mm (1.4 in)
2017
74.4 mm (2.9 in)
2018
74.4 mm (2.9 in)
2019
57.2 mm (2.3 in)
2020
59.2 mm (2.3 in)
2021
43.7 mm (1.7 in)
2022
24.1 mm (0.9 in)
2023
68.1 mm (2.7 in)
2024
72.6 mm (2.9 in)
2025
71.9 mm (2.8 in)
2026
26.4 mm (1.0 in)
Wettest five days (Rx5day)
The wettest five days of the year at Winona, 1893 to 2026. The record is 192.0 mm (7.6 in) in 2014, marked on the chart; the median year is 74.0 mm (2.9 in).
Wettest five days (Rx5day) at Winona by year
Year
Wettest five days (Rx5day)
1893
88.9 mm (3.5 in)
1894
69.9 mm (2.8 in)
1895
171.5 mm (6.8 in)
1896
69.9 mm (2.8 in)
1897
76.2 mm (3.0 in)
1898
139.7 mm (5.5 in)
1899
76.2 mm (3.0 in)
1900
101.6 mm (4.0 in)
1948
31.5 mm (1.2 in)
1949
119.1 mm (4.7 in)
1950
131.3 mm (5.2 in)
1951
148.9 mm (5.9 in)
1952
32.0 mm (1.3 in)
1953
39.4 mm (1.6 in)
1954
56.9 mm (2.2 in)
1955
72.7 mm (2.9 in)
1956
66.0 mm (2.6 in)
1957
66.4 mm (2.6 in)
1958
63.2 mm (2.5 in)
1959
63.5 mm (2.5 in)
1960
47.3 mm (1.9 in)
1961
87.3 mm (3.4 in)
1962
122.7 mm (4.8 in)
1963
70.7 mm (2.8 in)
1964
84.8 mm (3.3 in)
1965
76.3 mm (3.0 in)
1966
63.3 mm (2.5 in)
1967
72.9 mm (2.9 in)
1968
53.4 mm (2.1 in)
1969
62.8 mm (2.5 in)
1970
63.0 mm (2.5 in)
1971
45.8 mm (1.8 in)
1972
97.1 mm (3.8 in)
1973
63.4 mm (2.5 in)
1974
98.4 mm (3.9 in)
1975
n/a
1976
58.0 mm (2.3 in)
1977
84.6 mm (3.3 in)
1978
62.8 mm (2.5 in)
1979
54.4 mm (2.1 in)
1980
113.5 mm (4.5 in)
1981
58.3 mm (2.3 in)
1982
69.3 mm (2.7 in)
1983
33.8 mm (1.3 in)
1984
75.0 mm (3.0 in)
1985
66.3 mm (2.6 in)
1986
46.7 mm (1.8 in)
1987
81.9 mm (3.2 in)
1988
92.2 mm (3.6 in)
1989
117.9 mm (4.6 in)
1990
53.7 mm (2.1 in)
1991
55.3 mm (2.2 in)
1992
89.1 mm (3.5 in)
1993
113.0 mm (4.4 in)
1994
75.7 mm (3.0 in)
1995
91.5 mm (3.6 in)
1996
87.9 mm (3.5 in)
1997
77.2 mm (3.0 in)
1998
145.3 mm (5.7 in)
1999
115.3 mm (4.5 in)
2000
84.6 mm (3.3 in)
2001
58.2 mm (2.3 in)
2002
47.3 mm (1.9 in)
2003
29.7 mm (1.2 in)
2004
72.1 mm (2.8 in)
2005
75.5 mm (3.0 in)
2006
86.6 mm (3.4 in)
2007
86.6 mm (3.4 in)
2008
41.1 mm (1.6 in)
2009
60.5 mm (2.4 in)
2010
72.9 mm (2.9 in)
2011
85.1 mm (3.4 in)
2012
40.6 mm (1.6 in)
2013
131.0 mm (5.2 in)
2014
192.0 mm (7.6 in)
2015
91.2 mm (3.6 in)
2016
59.9 mm (2.4 in)
2017
90.2 mm (3.6 in)
2018
94.9 mm (3.7 in)
2019
95.6 mm (3.8 in)
2020
66.8 mm (2.6 in)
2021
61.2 mm (2.4 in)
2022
50.1 mm (2.0 in)
2023
107.8 mm (4.2 in)
2024
77.2 mm (3.0 in)
2025
98.1 mm (3.9 in)
2026
59.2 mm (2.3 in)
Longest dry spell (CDD)
The longest dry spell of the year at Winona, 1893 to 2026. The record is 122 days in 1894, marked on the chart; the median year is 44 days.
Longest dry spell (CDD) at Winona by year
Year
Longest dry spell (CDD)
1893
92 days
1894
122 days
1895
40 days
1896
61 days
1897
37 days
1898
74 days
1899
52 days
1900
32 days
1948
27 days
1949
49 days
1950
91 days
1951
37 days
1952
50 days
1953
57 days
1954
58 days
1955
57 days
1956
58 days
1957
40 days
1958
38 days
1959
56 days
1960
30 days
1961
35 days
1962
31 days
1963
52 days
1964
34 days
1965
52 days
1966
50 days
1967
57 days
1968
69 days
1969
27 days
1970
50 days
1971
33 days
1972
50 days
1973
33 days
1974
66 days
1975
n/a
1976
36 days
1977
44 days
1978
51 days
1979
51 days
1980
47 days
1981
27 days
1982
44 days
1983
51 days
1984
32 days
1985
34 days
1986
39 days
1987
42 days
1988
46 days
1989
25 days
1990
23 days
1991
44 days
1992
45 days
1993
47 days
1994
32 days
1995
48 days
1996
45 days
1997
37 days
1998
40 days
1999
45 days
2000
40 days
2001
36 days
2002
61 days
2003
55 days
2004
32 days
2005
35 days
2006
53 days
2007
41 days
2008
37 days
2009
61 days
2010
25 days
2011
27 days
2012
50 days
2013
55 days
2014
65 days
2015
30 days
2016
43 days
2017
51 days
2018
35 days
2019
27 days
2020
45 days
2021
43 days
2022
38 days
2023
38 days
2024
36 days
2025
38 days
2026
71 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
34 years with a frost
Across 34 years with a frost, the median last spring frost at Winona falls on 30 April and the median first autumn frost on 11 October, which leaves a median of 165 days between them.
Fitted over all years, the growing season changes by +3.4 days per decade at this station.
Frost dates and growing season at Winona
Measure
Median, all years
Earliest period
Recent period (1969 to 2009)
Recent against earliest
Fitted trend
Last spring frost
30 April
n/a
30 April
n/a
-1.8 days per decade
First autumn frost
11 October
n/a
11 October
n/a
+1.6 days per decade
Growing days
165 days
n/a
165 days
n/a
+3.4 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
68 years, 1895 to 2025
A day with at least 48.2 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 125.3 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
48.2 mm (1.9 in)
5 years
66.1 mm (2.6 in)
10 years
79.0 mm (3.1 in)
25 years
96.6 mm (3.8 in)
50 years
110.6 mm (4.4 in)
100 years
125.3 mm (4.9 in)
Longer than the 68 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, 68 years of values from 1895 to 2025.
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: 144.0 mm (5.7 in) in 2014; 101.3 mm (4.0 in) in 2013; 88.9 mm (3.5 in) in 1895.
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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.