Record envelope, standing records and threshold days for Willmar Wwtp (USC00219004), Minnesota, United States, with 118 years of record.
Key Facts for Willmar Wwtp
Willmar Wwtp (USC00219004) is a weather station in Minnesota, United States at 45.11 latitude and -95.04 longitude, 335 m (1,100 ft) above sea level.
The station reports from 1893 to 2010, 118 years of record.
1,464 records set at Willmar Wwtp still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Willmar Wwtp set a daily record precipitation of 79.2 mm (3.1 in) on 11 June 2010.
About the Station
Location: Minnesota, United States, 45.11 latitude, -95.04 longitude.
Elevation: 335 m (1,100 ft).
Period of record: 1893 to 2010, 118 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 Willmar Wwtp. 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 Willmar Wwtp, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
16.7 C (62.1 F)
-40.6 C (-41.1 F)
n/a
n/a
Feb
16.1 C (61.0 F)
-38.9 C (-38.0 F)
n/a
n/a
Mar
26.1 C (79.0 F)
-35.0 C (-31.0 F)
n/a
n/a
Apr
34.4 C (93.9 F)
-20.6 C (-5.1 F)
n/a
n/a
May
40.6 C (105.1 F)
-7.2 C (19.0 F)
n/a
n/a
Jun
39.4 C (102.9 F)
0.0 C (32.0 F)
n/a
n/a
Jul
41.7 C (107.1 F)
3.9 C (39.0 F)
n/a
n/a
Aug
40.6 C (105.1 F)
0.6 C (33.1 F)
n/a
n/a
Sep
40.6 C (105.1 F)
-7.2 C (19.0 F)
n/a
n/a
Oct
32.8 C (91.0 F)
-18.3 C (-0.9 F)
n/a
n/a
Nov
26.7 C (80.1 F)
-30.0 C (-22.0 F)
n/a
n/a
Dec
17.8 C (64.0 F)
-37.2 C (-35.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Willmar Wwtp still stand. 1936 holds the most, with 41.
Standing records at Willmar Wwtp by the year they were set
Year set
Standing records
1893
17
1894
26
1895
14
1896
24
1897
33
1898
6
1899
20
1900
11
1901
13
1902
17
1916
9
1917
22
1918
18
1919
10
1920
9
1921
19
1922
13
1923
19
1924
25
1925
31
1926
13
1927
14
1928
26
1929
19
1930
22
1931
33
1932
11
1933
12
1934
26
1935
19
1936
41
1937
12
1938
12
1939
23
1940
22
1941
16
1942
20
1943
8
1944
12
1945
15
1946
10
1947
19
1948
17
1949
11
1950
16
1951
17
1952
9
1953
14
1954
7
1955
7
1956
11
1957
3
1958
5
1959
14
1960
3
1961
9
1962
24
1963
15
1964
10
1965
12
1966
14
1967
11
1968
19
1969
15
1970
9
1971
8
1972
12
1973
9
1974
14
1975
7
1976
21
1977
24
1978
7
1979
7
1980
3
1981
9
1982
5
1983
17
1984
8
1985
10
1986
7
1987
17
1988
17
1989
16
1990
16
1991
17
1992
13
1993
4
1994
7
1995
12
1996
16
1997
9
1998
19
1999
7
2000
14
2001
10
2002
9
2003
8
2004
9
2005
8
2006
10
2007
9
2008
2
2009
11
2010
3
All-Time Record Progression
3 new records
3 all-time records were set at Willmar Wwtp between 14 August 1938 and 27 November 2001. Each dot is a new record.
When Willmar Wwtp set new all-time records
Date
Kind
Detail
1938-08-14
Record high minimum temperature
Record high minimum temperature 27.8 C (82.0 F)
1977-01-09
Record low minimum temperature
Record low minimum temperature -40.6 C (-41.1 F)
2001-11-27
Record daily snowfall
Record daily snowfall 53.3 cm (21.0 in)
Wettest Day of Each Month
Jun: 182.9 mm (7.2 in)
The wettest day on record for each calendar month at Willmar Wwtp. The most was 182.9 mm (7.2 in) on 9 June 1895.
Record daily precipitation for each month at Willmar Wwtp
Month
Record daily precipitation (mm)
Date
Jan
38.1 mm (1.5 in)
18 January 1996
Feb
76.2 mm (3.0 in)
22 February 1922
Mar
52.1 mm (2.1 in)
4 March 1985
Apr
84.1 mm (3.3 in)
30 April 1936
May
59.7 mm (2.4 in)
21 May 1893
Jun
182.9 mm (7.2 in)
9 June 1895
Jul
100.6 mm (4.0 in)
11 July 1981
Aug
106.9 mm (4.2 in)
16 August 1926
Sep
132.6 mm (5.2 in)
25 September 1929
Oct
69.9 mm (2.8 in)
9 October 1898
Nov
50.8 mm (2.0 in)
12 November 1899
Dec
33.0 mm (1.3 in)
9 December 1899
Period of Record Coverage
1893 to 2010
Complete yearUnder 90 percent of days
105 years of record at Willmar Wwtp, 1893 to 2010. 5 years have data for under 90 percent of days and are left out of rankings: 1893, 1902, 1916, 1979, 2010.
Cooler than the station meanWarmer than the station mean
One stripe for each of 96 complete years at Willmar Wwtp, 1894 to 2009. Blue stripes are years cooler than the station's own mean of 6.3 C (43.3 F); red stripes are warmer. The coolest year was 1924, at 3.8 C (38.8 F), and the warmest was 1931, at 9.0 C (48.1 F). The strongest colour marks a difference of 2.7 C (4.9 F).
Annual mean temperature at Willmar Wwtp as warming stripes, 1894 to 2009
Year
Annual mean temperature
Difference from the station mean
1894
6.3 C
0.00 C
1895
4.8 C
-1.50 C
1896
5.1 C
-1.15 C
1897
4.9 C
-1.37 C
1899
5.1 C
-1.16 C
1900
6.6 C
+0.33 C
1901
6.1 C
-0.17 C
1917
4.0 C
-2.27 C
1918
6.7 C
+0.39 C
1919
6.0 C
-0.31 C
1920
5.6 C
-0.73 C
1921
7.0 C
+0.72 C
1922
5.9 C
-0.35 C
1923
5.7 C
-0.64 C
1924
3.8 C
-2.51 C
1925
5.5 C
-0.82 C
1926
5.5 C
-0.76 C
1927
5.6 C
-0.68 C
1928
6.9 C
+0.56 C
1929
5.1 C
-1.16 C
1930
7.1 C
+0.85 C
1931
9.0 C
+2.68 C
1932
6.1 C
-0.20 C
1933
6.8 C
+0.46 C
1934
7.3 C
+0.97 C
1935
6.1 C
-0.23 C
1936
5.0 C
-1.25 C
1937
5.3 C
-1.00 C
1938
7.2 C
+0.95 C
1939
7.5 C
+1.19 C
1940
6.2 C
-0.11 C
1941
7.6 C
+1.28 C
1942
6.8 C
+0.47 C
1943
5.8 C
-0.53 C
1944
7.5 C
+1.19 C
1945
5.7 C
-0.63 C
1946
6.8 C
+0.46 C
1947
6.5 C
+0.16 C
1948
6.4 C
+0.11 C
1949
6.9 C
+0.59 C
1950
4.5 C
-1.78 C
1951
4.5 C
-1.75 C
1952
6.7 C
+0.42 C
1953
7.3 C
+1.00 C
1954
7.1 C
+0.80 C
1955
6.6 C
+0.27 C
1956
6.3 C
+0.03 C
1958
7.1 C
+0.78 C
1959
7.1 C
+0.78 C
1960
6.2 C
-0.05 C
1961
7.1 C
+0.82 C
1962
6.4 C
+0.14 C
1963
7.4 C
+1.09 C
1964
7.3 C
+1.04 C
1965
5.4 C
-0.91 C
1966
5.8 C
-0.53 C
1967
5.9 C
-0.42 C
1968
7.0 C
+0.72 C
1969
5.9 C
-0.41 C
1970
5.9 C
-0.39 C
1971
6.2 C
-0.06 C
1972
5.3 C
-1.04 C
1973
7.9 C
+1.58 C
1974
6.7 C
+0.38 C
1975
6.2 C
-0.09 C
1976
6.7 C
+0.42 C
1977
6.8 C
+0.53 C
1980
7.1 C
+0.76 C
1981
7.4 C
+1.13 C
1982
5.0 C
-1.29 C
1983
6.1 C
-0.20 C
1984
6.1 C
-0.20 C
1985
4.8 C
-1.52 C
1986
6.6 C
+0.33 C
1987
8.9 C
+2.58 C
1988
6.9 C
+0.62 C
1989
5.4 C
-0.90 C
1990
7.1 C
+0.76 C
1991
6.6 C
+0.32 C
1992
6.3 C
0.00 C
1993
4.9 C
-1.37 C
1994
5.9 C
-0.40 C
1995
6.0 C
-0.33 C
1996
4.2 C
-2.08 C
1997
5.8 C
-0.48 C
1998
8.2 C
+1.88 C
2000
6.4 C
+0.15 C
2001
6.9 C
+0.58 C
2002
6.8 C
+0.50 C
2003
6.2 C
-0.07 C
2004
6.6 C
+0.34 C
2005
7.3 C
+1.01 C
2006
8.0 C
+1.67 C
2007
7.0 C
+0.71 C
2008
5.4 C
-0.89 C
2009
5.9 C
-0.44 C
The annual mean temperature here has risen by 0.07 C (0.01 to 0.13) per decade over 1894 to 2009. In Fahrenheit: 0.12 F (0.01 to 0.24) per decade. The slope is a straight line fitted to 96 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Willmar Wwtp
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.07 C (0.01 to 0.13) per decade
0.12 F (0.01 to 0.24) per decade
1894 to 2009
96
Rise
Mean daily maximum
0.04 C (-0.03 to 0.11) per decade
0.1 F (-0.1 to 0.2) per decade
1894 to 2009
96
Not clearly different from zero
Mean daily minimum
0.10 C (0.03 to 0.16) per decade
0.2 F (0.1 to 0.3) per decade
1894 to 2009
96
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 2010
Yearly extremes at Willmar Wwtp: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
41.7 C (107.1 F)
1934
35.6 C (96.1 F)
105
Coldest night (TNn)
-40.6 C (-41.1 F)
1977
-31.7 C (-25.1 F)
105
Wettest day (Rx1day)
182.9 mm (7.2 in)
1895
58.4 mm (2.3 in)
105
Wettest five days (Rx5day)
212.3 mm (8.4 in)
1926
83.8 mm (3.3 in)
105
Longest dry spell (CDD)
81 days
1925
30 days
105
Hottest day (TXx)
The hottest day of the year at Willmar Wwtp, 1893 to 2010. The record is 41.7 C (107.1 F) in 1934, marked on the chart; the median year is 35.6 C (96.1 F).
Hottest day (TXx) at Willmar Wwtp by year
Year
Hottest day (TXx)
1893
37.8 C (100.0 F)
1894
37.2 C (99.0 F)
1895
37.2 C (99.0 F)
1896
36.7 C (98.1 F)
1897
35.0 C (95.0 F)
1898
34.4 C (93.9 F)
1899
33.3 C (91.9 F)
1900
36.7 C (98.1 F)
1901
38.9 C (102.0 F)
1902
32.8 C (91.0 F)
1916
34.4 C (93.9 F)
1917
37.2 C (99.0 F)
1918
36.7 C (98.1 F)
1919
33.9 C (93.0 F)
1920
33.3 C (91.9 F)
1921
35.6 C (96.1 F)
1922
32.8 C (91.0 F)
1923
35.0 C (95.0 F)
1924
32.8 C (91.0 F)
1925
36.1 C (97.0 F)
1926
37.2 C (99.0 F)
1927
35.0 C (95.0 F)
1928
35.0 C (95.0 F)
1929
36.7 C (98.1 F)
1930
36.7 C (98.1 F)
1931
40.6 C (105.1 F)
1932
36.7 C (98.1 F)
1933
37.8 C (100.0 F)
1934
41.7 C (107.1 F)
1935
39.4 C (102.9 F)
1936
40.0 C (104.0 F)
1937
36.7 C (98.1 F)
1938
36.1 C (97.0 F)
1939
37.2 C (99.0 F)
1940
40.0 C (104.0 F)
1941
38.3 C (100.9 F)
1942
35.6 C (96.1 F)
1943
33.9 C (93.0 F)
1944
34.4 C (93.9 F)
1945
35.6 C (96.1 F)
1946
35.6 C (96.1 F)
1947
38.9 C (102.0 F)
1948
38.3 C (100.9 F)
1949
38.9 C (102.0 F)
1950
35.6 C (96.1 F)
1951
33.3 C (91.9 F)
1952
33.9 C (93.0 F)
1953
35.0 C (95.0 F)
1954
35.0 C (95.0 F)
1955
36.7 C (98.1 F)
1956
36.7 C (98.1 F)
1957
35.0 C (95.0 F)
1958
35.0 C (95.0 F)
1959
35.6 C (96.1 F)
1960
34.4 C (93.9 F)
1961
35.6 C (96.1 F)
1962
32.8 C (91.0 F)
1963
35.6 C (96.1 F)
1964
36.1 C (97.0 F)
1965
35.0 C (95.0 F)
1966
35.6 C (96.1 F)
1967
33.9 C (93.0 F)
1968
35.0 C (95.0 F)
1969
36.1 C (97.0 F)
1970
35.6 C (96.1 F)
1971
35.0 C (95.0 F)
1972
35.0 C (95.0 F)
1973
35.6 C (96.1 F)
1974
36.7 C (98.1 F)
1975
36.7 C (98.1 F)
1976
37.8 C (100.0 F)
1977
35.6 C (96.1 F)
1978
37.2 C (99.0 F)
1979
38.9 C (102.0 F)
1980
36.1 C (97.0 F)
1981
32.8 C (91.0 F)
1982
34.4 C (93.9 F)
1983
35.0 C (95.0 F)
1984
35.0 C (95.0 F)
1985
35.0 C (95.0 F)
1986
35.0 C (95.0 F)
1987
35.6 C (96.1 F)
1988
40.6 C (105.1 F)
1989
36.1 C (97.0 F)
1990
38.3 C (100.9 F)
1991
35.0 C (95.0 F)
1992
32.8 C (91.0 F)
1993
32.2 C (90.0 F)
1994
36.1 C (97.0 F)
1995
37.2 C (99.0 F)
1996
35.6 C (96.1 F)
1997
33.3 C (91.9 F)
1998
35.0 C (95.0 F)
1999
35.0 C (95.0 F)
2000
36.7 C (98.1 F)
2001
36.7 C (98.1 F)
2002
35.0 C (95.0 F)
2003
35.0 C (95.0 F)
2004
35.0 C (95.0 F)
2005
36.1 C (97.0 F)
2006
37.2 C (99.0 F)
2007
36.1 C (97.0 F)
2008
33.9 C (93.0 F)
2009
35.6 C (96.1 F)
2010
34.4 C (93.9 F)
Coldest night (TNn)
The coldest night of the year at Willmar Wwtp, 1893 to 2010. The record is -40.6 C (-41.1 F) in 1977, marked on the chart; the median year is -31.7 C (-25.1 F).
Coldest night (TNn) at Willmar Wwtp by year
Year
Coldest night (TNn)
1893
-28.3 C (-18.9 F)
1894
-33.9 C (-29.0 F)
1895
-36.1 C (-33.0 F)
1896
-29.4 C (-20.9 F)
1897
-33.3 C (-27.9 F)
1898
-28.3 C (-18.9 F)
1899
-38.9 C (-38.0 F)
1900
-31.1 C (-24.0 F)
1901
-36.1 C (-33.0 F)
1902
-30.0 C (-22.0 F)
1916
-36.7 C (-34.1 F)
1917
-37.2 C (-35.0 F)
1918
-34.4 C (-29.9 F)
1919
-33.3 C (-27.9 F)
1920
-30.6 C (-23.1 F)
1921
-30.0 C (-22.0 F)
1922
-31.7 C (-25.1 F)
1923
-30.6 C (-23.1 F)
1924
-36.1 C (-33.0 F)
1925
-32.2 C (-26.0 F)
1926
-31.1 C (-24.0 F)
1927
-33.3 C (-27.9 F)
1928
-33.3 C (-27.9 F)
1929
-33.9 C (-29.0 F)
1930
-32.8 C (-27.0 F)
1931
-23.9 C (-11.0 F)
1932
-28.9 C (-20.0 F)
1933
-33.9 C (-29.0 F)
1934
-30.0 C (-22.0 F)
1935
-36.1 C (-33.0 F)
1936
-38.3 C (-36.9 F)
1937
-34.4 C (-29.9 F)
1938
-29.4 C (-20.9 F)
1939
-32.2 C (-26.0 F)
1940
-31.7 C (-25.1 F)
1941
-30.0 C (-22.0 F)
1942
-31.7 C (-25.1 F)
1943
-36.7 C (-34.1 F)
1944
-28.3 C (-18.9 F)
1945
-29.4 C (-20.9 F)
1946
-30.6 C (-23.1 F)
1947
-27.2 C (-17.0 F)
1948
-35.6 C (-32.1 F)
1949
-32.2 C (-26.0 F)
1950
-32.2 C (-26.0 F)
1951
-35.6 C (-32.1 F)
1952
-32.8 C (-27.0 F)
1953
-32.2 C (-26.0 F)
1954
-34.4 C (-29.9 F)
1955
-32.8 C (-27.0 F)
1956
-30.6 C (-23.1 F)
1957
-28.9 C (-20.0 F)
1958
-29.4 C (-20.9 F)
1959
-28.9 C (-20.0 F)
1960
-30.6 C (-23.1 F)
1961
-30.0 C (-22.0 F)
1962
-33.3 C (-27.9 F)
1963
-31.1 C (-24.0 F)
1964
-28.9 C (-20.0 F)
1965
-31.7 C (-25.1 F)
1966
-33.3 C (-27.9 F)
1967
-35.6 C (-32.1 F)
1968
-31.7 C (-25.1 F)
1969
-28.9 C (-20.0 F)
1970
-36.1 C (-33.0 F)
1971
-30.0 C (-22.0 F)
1972
-32.2 C (-26.0 F)
1973
-31.7 C (-25.1 F)
1974
-34.4 C (-29.9 F)
1975
-31.7 C (-25.1 F)
1976
-32.8 C (-27.0 F)
1977
-40.6 C (-41.1 F)
1978
-30.0 C (-22.0 F)
1979
-32.8 C (-27.0 F)
1980
-27.2 C (-17.0 F)
1981
-32.8 C (-27.0 F)
1982
-34.4 C (-29.9 F)
1983
-36.7 C (-34.1 F)
1984
-33.3 C (-27.9 F)
1985
-32.2 C (-26.0 F)
1986
-31.1 C (-24.0 F)
1987
-28.3 C (-18.9 F)
1988
-31.7 C (-25.1 F)
1989
-33.3 C (-27.9 F)
1990
-31.1 C (-24.0 F)
1991
-27.2 C (-17.0 F)
1992
-27.8 C (-18.0 F)
1993
-31.7 C (-25.1 F)
1994
-35.6 C (-32.1 F)
1995
-26.1 C (-15.0 F)
1996
-37.8 C (-36.0 F)
1997
-27.8 C (-18.0 F)
1998
-27.8 C (-18.0 F)
1999
-31.1 C (-24.0 F)
2000
-29.4 C (-20.9 F)
2001
-29.4 C (-20.9 F)
2002
-22.2 C (-8.0 F)
2003
-28.9 C (-20.0 F)
2004
-31.1 C (-24.0 F)
2005
-29.4 C (-20.9 F)
2006
-27.2 C (-17.0 F)
2007
-28.3 C (-18.9 F)
2008
-30.6 C (-23.1 F)
2009
-33.3 C (-27.9 F)
2010
-30.6 C (-23.1 F)
Wettest day (Rx1day)
The wettest day of the year at Willmar Wwtp, 1893 to 2010. The record is 182.9 mm (7.2 in) in 1895, marked on the chart; the median year is 58.4 mm (2.3 in).
Wettest day (Rx1day) at Willmar Wwtp by year
Year
Wettest day (Rx1day)
1893
59.7 mm (2.4 in)
1894
58.4 mm (2.3 in)
1895
182.9 mm (7.2 in)
1896
63.2 mm (2.5 in)
1897
67.3 mm (2.6 in)
1898
97.8 mm (3.9 in)
1899
53.3 mm (2.1 in)
1900
72.4 mm (2.9 in)
1901
69.3 mm (2.7 in)
1902
58.4 mm (2.3 in)
1916
54.6 mm (2.1 in)
1917
45.7 mm (1.8 in)
1918
33.8 mm (1.3 in)
1919
37.8 mm (1.5 in)
1920
73.4 mm (2.9 in)
1921
53.8 mm (2.1 in)
1922
76.2 mm (3.0 in)
1923
31.2 mm (1.2 in)
1924
53.8 mm (2.1 in)
1925
62.2 mm (2.4 in)
1926
106.9 mm (4.2 in)
1927
53.3 mm (2.1 in)
1928
63.2 mm (2.5 in)
1929
132.6 mm (5.2 in)
1930
47.2 mm (1.9 in)
1931
58.4 mm (2.3 in)
1932
62.2 mm (2.4 in)
1933
43.7 mm (1.7 in)
1934
65.5 mm (2.6 in)
1935
46.7 mm (1.8 in)
1936
84.1 mm (3.3 in)
1937
46.7 mm (1.8 in)
1938
55.1 mm (2.2 in)
1939
34.3 mm (1.4 in)
1940
36.1 mm (1.4 in)
1941
55.9 mm (2.2 in)
1942
100.3 mm (3.9 in)
1943
33.3 mm (1.3 in)
1944
42.2 mm (1.7 in)
1945
38.6 mm (1.5 in)
1946
61.5 mm (2.4 in)
1947
45.7 mm (1.8 in)
1948
47.8 mm (1.9 in)
1949
60.5 mm (2.4 in)
1950
46.0 mm (1.8 in)
1951
50.3 mm (2.0 in)
1952
79.5 mm (3.1 in)
1953
47.2 mm (1.9 in)
1954
47.2 mm (1.9 in)
1955
46.5 mm (1.8 in)
1956
62.0 mm (2.4 in)
1957
173.2 mm (6.8 in)
1958
57.2 mm (2.3 in)
1959
58.4 mm (2.3 in)
1960
62.2 mm (2.4 in)
1961
48.8 mm (1.9 in)
1962
38.4 mm (1.5 in)
1963
61.0 mm (2.4 in)
1964
53.3 mm (2.1 in)
1965
53.8 mm (2.1 in)
1966
47.2 mm (1.9 in)
1967
126.5 mm (5.0 in)
1968
62.2 mm (2.4 in)
1969
27.9 mm (1.1 in)
1970
49.0 mm (1.9 in)
1971
84.1 mm (3.3 in)
1972
55.9 mm (2.2 in)
1973
47.8 mm (1.9 in)
1974
62.2 mm (2.4 in)
1975
73.7 mm (2.9 in)
1976
47.5 mm (1.9 in)
1977
57.4 mm (2.3 in)
1978
54.1 mm (2.1 in)
1979
67.8 mm (2.7 in)
1980
47.0 mm (1.9 in)
1981
100.6 mm (4.0 in)
1982
50.8 mm (2.0 in)
1983
85.9 mm (3.4 in)
1984
66.0 mm (2.6 in)
1985
52.1 mm (2.1 in)
1986
62.0 mm (2.4 in)
1987
74.7 mm (2.9 in)
1988
39.6 mm (1.6 in)
1989
96.5 mm (3.8 in)
1990
60.7 mm (2.4 in)
1991
108.0 mm (4.3 in)
1992
140.7 mm (5.5 in)
1993
90.9 mm (3.6 in)
1994
43.7 mm (1.7 in)
1995
47.2 mm (1.9 in)
1996
51.3 mm (2.0 in)
1997
116.8 mm (4.6 in)
1998
57.7 mm (2.3 in)
1999
50.8 mm (2.0 in)
2000
44.5 mm (1.8 in)
2001
74.2 mm (2.9 in)
2002
79.5 mm (3.1 in)
2003
64.3 mm (2.5 in)
2004
61.2 mm (2.4 in)
2005
80.0 mm (3.1 in)
2006
29.2 mm (1.1 in)
2007
87.6 mm (3.4 in)
2008
71.1 mm (2.8 in)
2009
76.2 mm (3.0 in)
2010
79.2 mm (3.1 in)
Wettest five days (Rx5day)
The wettest five days of the year at Willmar Wwtp, 1893 to 2010. The record is 212.3 mm (8.4 in) in 1926, marked on the chart; the median year is 83.8 mm (3.3 in).
Wettest five days (Rx5day) at Willmar Wwtp by year
Year
Wettest five days (Rx5day)
1893
72.4 mm (2.9 in)
1894
77.0 mm (3.0 in)
1895
185.4 mm (7.3 in)
1896
88.9 mm (3.5 in)
1897
105.4 mm (4.1 in)
1898
108.0 mm (4.3 in)
1899
78.8 mm (3.1 in)
1900
126.5 mm (5.0 in)
1901
86.2 mm (3.4 in)
1902
61.4 mm (2.4 in)
1916
76.0 mm (3.0 in)
1917
58.4 mm (2.3 in)
1918
50.8 mm (2.0 in)
1919
77.4 mm (3.0 in)
1920
102.6 mm (4.0 in)
1921
79.5 mm (3.1 in)
1922
89.6 mm (3.5 in)
1923
32.2 mm (1.3 in)
1924
64.7 mm (2.5 in)
1925
97.0 mm (3.8 in)
1926
212.3 mm (8.4 in)
1927
58.1 mm (2.3 in)
1928
104.3 mm (4.1 in)
1929
151.4 mm (6.0 in)
1930
110.6 mm (4.4 in)
1931
71.6 mm (2.8 in)
1932
76.9 mm (3.0 in)
1933
48.0 mm (1.9 in)
1934
80.9 mm (3.2 in)
1935
83.8 mm (3.3 in)
1936
90.9 mm (3.6 in)
1937
71.3 mm (2.8 in)
1938
79.0 mm (3.1 in)
1939
43.9 mm (1.7 in)
1940
64.8 mm (2.6 in)
1941
106.6 mm (4.2 in)
1942
111.0 mm (4.4 in)
1943
62.5 mm (2.5 in)
1944
89.2 mm (3.5 in)
1945
73.1 mm (2.9 in)
1946
104.1 mm (4.1 in)
1947
81.8 mm (3.2 in)
1948
62.1 mm (2.4 in)
1949
92.4 mm (3.6 in)
1950
71.9 mm (2.8 in)
1951
78.2 mm (3.1 in)
1952
119.6 mm (4.7 in)
1953
110.8 mm (4.4 in)
1954
56.9 mm (2.2 in)
1955
99.5 mm (3.9 in)
1956
140.2 mm (5.5 in)
1957
199.1 mm (7.8 in)
1958
63.8 mm (2.5 in)
1959
65.8 mm (2.6 in)
1960
145.8 mm (5.7 in)
1961
69.6 mm (2.7 in)
1962
78.3 mm (3.1 in)
1963
78.7 mm (3.1 in)
1964
69.9 mm (2.8 in)
1965
120.1 mm (4.7 in)
1966
59.2 mm (2.3 in)
1967
154.2 mm (6.1 in)
1968
149.9 mm (5.9 in)
1969
42.6 mm (1.7 in)
1970
63.0 mm (2.5 in)
1971
117.6 mm (4.6 in)
1972
85.9 mm (3.4 in)
1973
74.9 mm (2.9 in)
1974
70.1 mm (2.8 in)
1975
92.0 mm (3.6 in)
1976
63.5 mm (2.5 in)
1977
80.8 mm (3.2 in)
1978
88.3 mm (3.5 in)
1979
112.8 mm (4.4 in)
1980
76.2 mm (3.0 in)
1981
127.0 mm (5.0 in)
1982
61.2 mm (2.4 in)
1983
103.4 mm (4.1 in)
1984
121.3 mm (4.8 in)
1985
91.6 mm (3.6 in)
1986
95.0 mm (3.7 in)
1987
75.5 mm (3.0 in)
1988
52.8 mm (2.1 in)
1989
114.3 mm (4.5 in)
1990
124.7 mm (4.9 in)
1991
174.6 mm (6.9 in)
1992
194.0 mm (7.6 in)
1993
91.2 mm (3.6 in)
1994
67.3 mm (2.6 in)
1995
62.2 mm (2.4 in)
1996
62.0 mm (2.4 in)
1997
161.5 mm (6.4 in)
1998
60.0 mm (2.4 in)
1999
63.7 mm (2.5 in)
2000
57.2 mm (2.3 in)
2001
99.9 mm (3.9 in)
2002
129.0 mm (5.1 in)
2003
156.0 mm (6.1 in)
2004
89.7 mm (3.5 in)
2005
122.4 mm (4.8 in)
2006
73.1 mm (2.9 in)
2007
116.3 mm (4.6 in)
2008
77.4 mm (3.0 in)
2009
93.5 mm (3.7 in)
2010
99.3 mm (3.9 in)
Longest dry spell (CDD)
The longest dry spell of the year at Willmar Wwtp, 1893 to 2010. The record is 81 days in 1925, marked on the chart; the median year is 30 days.
Longest dry spell (CDD) at Willmar Wwtp by year
Year
Longest dry spell (CDD)
1893
18 days
1894
27 days
1895
42 days
1896
27 days
1897
37 days
1898
34 days
1899
43 days
1900
31 days
1901
37 days
1902
28 days
1916
55 days
1917
32 days
1918
27 days
1919
25 days
1920
32 days
1921
41 days
1922
22 days
1923
28 days
1924
37 days
1925
81 days
1926
27 days
1927
24 days
1928
31 days
1929
17 days
1930
36 days
1931
37 days
1932
35 days
1933
33 days
1934
65 days
1935
26 days
1936
35 days
1937
31 days
1938
26 days
1939
66 days
1940
17 days
1941
31 days
1942
38 days
1943
53 days
1944
40 days
1945
30 days
1946
18 days
1947
20 days
1948
36 days
1949
34 days
1950
30 days
1951
17 days
1952
56 days
1953
24 days
1954
30 days
1955
18 days
1956
35 days
1957
24 days
1958
30 days
1959
33 days
1960
41 days
1961
49 days
1962
27 days
1963
19 days
1964
37 days
1965
22 days
1966
24 days
1967
42 days
1968
31 days
1969
22 days
1970
30 days
1971
26 days
1972
23 days
1973
38 days
1974
22 days
1975
21 days
1976
34 days
1977
18 days
1978
44 days
1979
18 days
1980
39 days
1981
28 days
1982
32 days
1983
29 days
1984
24 days
1985
20 days
1986
41 days
1987
39 days
1988
36 days
1989
37 days
1990
46 days
1991
27 days
1992
24 days
1993
20 days
1994
25 days
1995
28 days
1996
28 days
1997
26 days
1998
19 days
1999
22 days
2000
20 days
2001
30 days
2002
49 days
2003
34 days
2004
25 days
2005
24 days
2006
39 days
2007
35 days
2008
25 days
2009
30 days
2010
30 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
96 years with a frost
Across 96 years with a frost, the median last spring frost at Willmar Wwtp falls on 4 May and the median first autumn frost on 29 September, which leaves a median of 150 days between them.
In 1977 to 2009 the median growing season was 157 days. That is 17 days more than in 1894 to 1939.
Fitted over all years, the growing season changes by +2.3 days per decade at this station.
Frost dates and growing season at Willmar Wwtp
Measure
Median, all years
Earliest period (1894 to 1939)
Recent period (1977 to 2009)
Recent against earliest
Fitted trend
Last spring frost
4 May
12 May
30 April
12 days earlier
-1.5 days per decade
First autumn frost
29 September
25 September
3 October
8 days later
+0.8 days per decade
Growing days
150 days
140 days
157 days
17 days more
+2.3 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
101 years, 1894 to 2009
A day with at least 57.4 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 171.3 mm (6.7 in) of rain is expected about once in 100 years.
Rainfall return levels at Willmar Wwtp: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
57.4 mm (2.3 in)
5 years
78.7 mm (3.1 in)
10 years
95.9 mm (3.8 in)
25 years
121.9 mm (4.8 in)
50 years
144.9 mm (5.7 in)
100 years
171.3 mm (6.7 in)
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 101 years of values from 1894 to 2009.
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: 182.9 mm (7.2 in) in 1895; 173.2 mm (6.8 in) in 1957; 140.7 mm (5.5 in) in 1992.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Willmar Wwtp standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Willmar Wwtp 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.