Record envelope, standing records and threshold days for Superior (USW00024159), Montana, United States, with 105 years of record.
Key Facts for Superior
Superior (USW00024159) is a weather station in Montana, United States at 47.19 latitude and -114.89 longitude, 826 m (2,710 ft) above sea level.
The station reports from 1914 to 2018, 105 years of record.
1,464 records set at Superior still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Superior set a monthly record high maximum temperature of 41.7 C (107.1 F) on 11 August 2018.
About the Station
Location: Montana, United States, 47.19 latitude, -114.89 longitude.
Elevation: 826 m (2,710 ft).
Period of record: 1914 to 2018, 105 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 Superior. 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 Superior, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
15.6 C (60.1 F)
-37.8 C (-36.0 F)
n/a
n/a
Feb
20.6 C (69.1 F)
-36.1 C (-33.0 F)
n/a
n/a
Mar
26.7 C (80.1 F)
-22.8 C (-9.0 F)
n/a
n/a
Apr
32.2 C (90.0 F)
-16.7 C (1.9 F)
n/a
n/a
May
37.2 C (99.0 F)
-8.3 C (17.1 F)
n/a
n/a
Jun
38.9 C (102.0 F)
-6.7 C (19.9 F)
n/a
n/a
Jul
42.2 C (108.0 F)
-1.1 C (30.0 F)
n/a
n/a
Aug
41.7 C (107.1 F)
-4.4 C (24.1 F)
n/a
n/a
Sep
39.4 C (102.9 F)
-10.6 C (12.9 F)
n/a
n/a
Oct
32.2 C (90.0 F)
-19.4 C (-2.9 F)
n/a
n/a
Nov
23.3 C (73.9 F)
-26.1 C (-15.0 F)
n/a
n/a
Dec
16.1 C (61.0 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 Superior still stand. 1919 holds the most, with 43.
Standing records at Superior by the year they were set
Year set
Standing records
1914
19
1915
14
1916
37
1917
34
1918
32
1919
43
1920
20
1921
19
1923
2
1924
33
1925
13
1926
13
1927
12
1928
10
1929
20
1930
27
1931
22
1932
14
1933
26
1934
25
1935
34
1936
36
1937
21
1938
6
1939
20
1940
8
1941
8
1942
15
1943
15
1944
10
1945
12
1946
9
1947
8
1948
12
1949
18
1950
28
1951
15
1952
6
1953
16
1954
11
1955
20
1956
8
1957
15
1958
6
1959
10
1960
25
1961
17
1962
13
1963
15
1964
8
1965
17
1966
11
1967
12
1968
14
1969
10
1970
9
1971
11
1972
21
1973
8
1974
5
1975
8
1976
11
1977
16
1978
6
1979
14
1980
4
1981
8
1982
5
1983
16
1984
14
1985
18
1986
18
1987
11
1988
8
1989
19
1990
12
1991
7
1992
10
1993
12
1994
11
1995
17
1996
9
1997
6
1998
18
1999
14
2000
8
2001
7
2002
17
2003
16
2004
12
2005
2
2006
12
2007
10
2008
9
2009
9
2010
7
2011
10
2012
8
2013
14
2014
7
2015
15
2016
8
2018
3
All-Time Record Progression
8 new records
8 all-time records were set at Superior between 22 August 1947 and 18 December 2015. Each dot is a new record.
When Superior set new all-time records
Date
Kind
Detail
1947-08-22
Record daily precipitation
Record daily precipitation 42.9 mm (1.7 in)
1950-01-19
Record snow depth
Record snow depth 78.7 cm (31.0 in)
1953-01-26
Record daily precipitation
Record daily precipitation 51.8 mm (2.0 in)
1996-12-27
Record snow depth
Record snow depth 101.6 cm (40.0 in)
1996-12-29
Record snow depth
Record snow depth 111.8 cm (44.0 in)
2012-01-19
Record daily snowfall
Record daily snowfall 39.4 cm (15.5 in)
2015-07-11
Record daily precipitation
Record daily precipitation 55.9 mm (2.2 in)
2015-12-18
Record daily precipitation
Record daily precipitation 58.4 mm (2.3 in)
Wettest Day of Each Month
Dec: 58.4 mm (2.3 in)
The wettest day on record for each calendar month at Superior. The most was 58.4 mm (2.3 in) on 18 December 2015.
Record daily precipitation for each month at Superior
Month
Record daily precipitation (mm)
Date
Jan
51.8 mm (2.0 in)
26 January 1953
Feb
29.7 mm (1.2 in)
10 February 1949
Mar
25.4 mm (1.0 in)
1 March 2001
Apr
30.5 mm (1.2 in)
6 April 2006
May
46.7 mm (1.8 in)
20 May 1957
Jun
44.2 mm (1.7 in)
17 June 2005
Jul
55.9 mm (2.2 in)
11 July 2015
Aug
42.9 mm (1.7 in)
22 August 1947
Sep
29.7 mm (1.2 in)
16 September 1947
Oct
38.4 mm (1.5 in)
27 October 1994
Nov
37.8 mm (1.5 in)
1 November 2015
Dec
58.4 mm (2.3 in)
18 December 2015
Period of Record Coverage
1914 to 2018
Complete yearUnder 90 percent of days
104 years of record at Superior, 1914 to 2018. 21 years have data for under 90 percent of days and are left out of rankings: 1914, 1915, 1916, 1917, 1918, 1919, 1920, 1921 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 78 complete years at Superior, 1924 to 2014. Blue stripes are years cooler than the station's own mean of 8.1 C (46.5 F); red stripes are warmer. The coolest year was 1949, at 6.0 C (42.7 F), and the warmest was 1934, at 10.1 C (50.2 F). The strongest colour marks a difference of 2.2 C (4.0 F).
Annual mean temperature at Superior as warming stripes, 1924 to 2014
Year
Annual mean temperature
Difference from the station mean
1924
6.6 C
-1.45 C
1927
7.0 C
-1.10 C
1928
7.1 C
-1.01 C
1930
6.9 C
-1.20 C
1931
8.0 C
-0.13 C
1932
7.4 C
-0.73 C
1933
8.0 C
-0.12 C
1934
10.1 C
+2.02 C
1935
8.2 C
+0.12 C
1936
7.8 C
-0.27 C
1937
7.2 C
-0.89 C
1938
8.1 C
-0.01 C
1939
9.1 C
+1.01 C
1940
9.1 C
+0.99 C
1941
8.6 C
+0.51 C
1942
7.4 C
-0.70 C
1943
7.3 C
-0.79 C
1944
7.6 C
-0.52 C
1946
7.4 C
-0.73 C
1947
7.6 C
-0.45 C
1948
6.2 C
-1.91 C
1949
6.0 C
-2.13 C
1950
6.0 C
-2.04 C
1951
6.0 C
-2.09 C
1952
6.7 C
-1.36 C
1953
8.2 C
+0.13 C
1954
7.6 C
-0.53 C
1956
7.7 C
-0.40 C
1957
7.7 C
-0.42 C
1959
7.7 C
-0.41 C
1960
7.9 C
-0.15 C
1961
8.8 C
+0.76 C
1962
8.2 C
+0.14 C
1963
8.7 C
+0.60 C
1964
7.6 C
-0.48 C
1965
8.4 C
+0.33 C
1966
8.9 C
+0.84 C
1967
8.9 C
+0.83 C
1968
8.0 C
-0.04 C
1969
7.8 C
-0.30 C
1970
8.0 C
-0.08 C
1971
7.9 C
-0.23 C
1972
7.8 C
-0.28 C
1973
8.6 C
+0.47 C
1974
8.7 C
+0.59 C
1975
7.4 C
-0.71 C
1976
8.3 C
+0.25 C
1977
8.1 C
+0.05 C
1978
7.7 C
-0.40 C
1981
8.7 C
+0.58 C
1982
7.5 C
-0.57 C
1983
8.1 C
+0.05 C
1984
7.9 C
-0.21 C
1985
6.9 C
-1.17 C
1987
8.2 C
+0.07 C
1988
8.8 C
+0.72 C
1990
8.6 C
+0.50 C
1991
8.4 C
+0.33 C
1992
9.2 C
+1.10 C
1993
7.3 C
-0.83 C
1994
9.5 C
+1.37 C
1995
9.0 C
+0.95 C
1997
8.2 C
+0.08 C
1998
9.2 C
+1.08 C
2000
8.4 C
+0.31 C
2001
9.3 C
+1.19 C
2002
8.5 C
+0.44 C
2003
9.2 C
+1.14 C
2005
8.4 C
+0.36 C
2006
9.3 C
+1.17 C
2007
9.3 C
+1.24 C
2008
7.8 C
-0.25 C
2009
8.6 C
+0.56 C
2010
8.9 C
+0.77 C
2011
8.5 C
+0.38 C
2012
9.5 C
+1.43 C
2013
8.7 C
+0.64 C
2014
8.7 C
+0.64 C
The annual mean temperature here has risen by 0.2 C (0.1 to 0.2) per decade over 1924 to 2014. In Fahrenheit: 0.3 F (0.2 to 0.4) per decade. The slope is a straight line fitted to 78 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Superior
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.2 C (0.1 to 0.2) per decade
0.3 F (0.2 to 0.4) per decade
1924 to 2014
78
Rise
Mean daily maximum
0.06 C (-0.03 to 0.15) per decade
0.1 F (-0.1 to 0.3) per decade
1924 to 2014
78
Not clearly different from zero
Mean daily minimum
0.3 C (0.2 to 0.3) per decade
0.5 F (0.4 to 0.6) per decade
1924 to 2014
78
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
1914 to 2018
Yearly extremes at Superior: 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)
1935
37.8 C (100.0 F)
104
Coldest night (TNn)
-37.8 C (-36.0 F)
1937
-24.7 C (-12.5 F)
104
Wettest day (Rx1day)
58.4 mm (2.3 in)
2015
25.4 mm (1.0 in)
104
Wettest five days (Rx5day)
118.9 mm (4.7 in)
2015
43.0 mm (1.7 in)
103
Longest dry spell (CDD)
108 days
1931
28 days
104
Hottest day (TXx)
The hottest day of the year at Superior, 1914 to 2018. The record is 42.2 C (108.0 F) in 1935, marked on the chart; the median year is 37.8 C (100.0 F).
Hottest day (TXx) at Superior by year
Year
Hottest day (TXx)
1914
40.0 C (104.0 F)
1915
40.6 C (105.1 F)
1916
36.1 C (97.0 F)
1917
36.7 C (98.1 F)
1918
36.1 C (97.0 F)
1919
39.4 C (102.9 F)
1920
34.4 C (93.9 F)
1921
36.1 C (97.0 F)
1923
36.7 C (98.1 F)
1924
38.3 C (100.9 F)
1925
37.8 C (100.0 F)
1926
37.8 C (100.0 F)
1927
36.7 C (98.1 F)
1928
38.3 C (100.9 F)
1929
40.0 C (104.0 F)
1930
39.4 C (102.9 F)
1931
39.4 C (102.9 F)
1932
38.3 C (100.9 F)
1933
39.4 C (102.9 F)
1934
40.6 C (105.1 F)
1935
42.2 C (108.0 F)
1936
40.0 C (104.0 F)
1937
37.8 C (100.0 F)
1938
37.8 C (100.0 F)
1939
40.0 C (104.0 F)
1940
40.0 C (104.0 F)
1941
38.9 C (102.0 F)
1942
37.8 C (100.0 F)
1943
36.1 C (97.0 F)
1944
36.1 C (97.0 F)
1945
36.7 C (98.1 F)
1946
37.2 C (99.0 F)
1947
37.2 C (99.0 F)
1948
34.4 C (93.9 F)
1949
37.8 C (100.0 F)
1950
39.4 C (102.9 F)
1951
37.8 C (100.0 F)
1952
38.3 C (100.9 F)
1953
40.6 C (105.1 F)
1954
37.2 C (99.0 F)
1955
38.9 C (102.0 F)
1956
36.1 C (97.0 F)
1957
36.1 C (97.0 F)
1958
36.7 C (98.1 F)
1959
38.9 C (102.0 F)
1960
40.0 C (104.0 F)
1961
41.1 C (106.0 F)
1962
37.8 C (100.0 F)
1963
37.2 C (99.0 F)
1964
37.8 C (100.0 F)
1965
36.7 C (98.1 F)
1966
36.1 C (97.0 F)
1967
37.2 C (99.0 F)
1968
35.0 C (95.0 F)
1969
40.6 C (105.1 F)
1970
36.7 C (98.1 F)
1971
37.8 C (100.0 F)
1972
36.7 C (98.1 F)
1973
38.9 C (102.0 F)
1974
37.2 C (99.0 F)
1975
38.3 C (100.9 F)
1976
35.6 C (96.1 F)
1977
36.7 C (98.1 F)
1978
36.7 C (98.1 F)
1979
38.3 C (100.9 F)
1980
35.6 C (96.1 F)
1981
36.7 C (98.1 F)
1982
33.9 C (93.0 F)
1983
36.7 C (98.1 F)
1984
37.8 C (100.0 F)
1985
37.8 C (100.0 F)
1986
38.9 C (102.0 F)
1987
35.6 C (96.1 F)
1988
36.7 C (98.1 F)
1989
36.7 C (98.1 F)
1990
37.2 C (99.0 F)
1991
36.7 C (98.1 F)
1992
37.8 C (100.0 F)
1993
35.0 C (95.0 F)
1994
38.3 C (100.9 F)
1995
36.1 C (97.0 F)
1996
37.8 C (100.0 F)
1997
37.8 C (100.0 F)
1998
39.4 C (102.9 F)
1999
38.3 C (100.9 F)
2000
38.9 C (102.0 F)
2001
38.3 C (100.9 F)
2002
41.1 C (106.0 F)
2003
38.9 C (102.0 F)
2004
37.8 C (100.0 F)
2005
37.8 C (100.0 F)
2006
38.9 C (102.0 F)
2007
40.0 C (104.0 F)
2008
38.3 C (100.9 F)
2009
36.7 C (98.1 F)
2010
36.7 C (98.1 F)
2011
36.1 C (97.0 F)
2012
37.8 C (100.0 F)
2013
38.9 C (102.0 F)
2014
37.2 C (99.0 F)
2015
38.3 C (100.9 F)
2016
36.1 C (97.0 F)
2017
8.9 C (48.0 F)
2018
41.7 C (107.1 F)
Coldest night (TNn)
The coldest night of the year at Superior, 1914 to 2018. The record is -37.8 C (-36.0 F) in 1937, marked on the chart; the median year is -24.7 C (-12.5 F).
Coldest night (TNn) at Superior by year
Year
Coldest night (TNn)
1914
-29.4 C (-20.9 F)
1915
-25.6 C (-14.1 F)
1916
-31.1 C (-24.0 F)
1917
-25.6 C (-14.1 F)
1918
-31.1 C (-24.0 F)
1919
-30.6 C (-23.1 F)
1920
-18.3 C (-0.9 F)
1921
-18.3 C (-0.9 F)
1923
-28.9 C (-20.0 F)
1924
-33.3 C (-27.9 F)
1925
-11.7 C (10.9 F)
1926
-21.1 C (-6.0 F)
1927
-32.8 C (-27.0 F)
1928
-22.8 C (-9.0 F)
1929
-34.4 C (-29.9 F)
1930
-34.4 C (-29.9 F)
1931
-22.8 C (-9.0 F)
1932
-26.7 C (-16.1 F)
1933
-36.1 C (-33.0 F)
1934
-13.3 C (8.1 F)
1935
-32.8 C (-27.0 F)
1936
-36.1 C (-33.0 F)
1937
-37.8 C (-36.0 F)
1938
-23.3 C (-9.9 F)
1939
-26.1 C (-15.0 F)
1940
-21.7 C (-7.1 F)
1941
-18.3 C (-0.9 F)
1942
-30.6 C (-23.1 F)
1943
-30.0 C (-22.0 F)
1944
-26.7 C (-16.1 F)
1945
-18.9 C (-2.0 F)
1946
-17.8 C (0.0 F)
1947
-19.4 C (-2.9 F)
1948
-27.2 C (-17.0 F)
1949
-33.3 C (-27.9 F)
1950
-35.0 C (-31.0 F)
1951
-27.8 C (-18.0 F)
1952
-26.1 C (-15.0 F)
1953
-10.6 C (12.9 F)
1954
-23.3 C (-9.9 F)
1955
-25.6 C (-14.1 F)
1956
-28.3 C (-18.9 F)
1957
-33.9 C (-29.0 F)
1958
-16.1 C (3.0 F)
1959
-26.1 C (-15.0 F)
1960
-26.1 C (-15.0 F)
1961
-25.6 C (-14.1 F)
1962
-28.3 C (-18.9 F)
1963
-29.4 C (-20.9 F)
1964
-30.0 C (-22.0 F)
1965
-20.0 C (-4.0 F)
1966
-17.8 C (0.0 F)
1967
-16.7 C (1.9 F)
1968
-31.1 C (-24.0 F)
1969
-22.2 C (-8.0 F)
1970
-21.1 C (-6.0 F)
1971
-18.3 C (-0.9 F)
1972
-27.8 C (-18.0 F)
1973
-25.6 C (-14.1 F)
1974
-25.6 C (-14.1 F)
1975
-21.1 C (-6.0 F)
1976
-18.9 C (-2.0 F)
1977
-20.6 C (-5.1 F)
1978
-30.6 C (-23.1 F)
1979
-33.3 C (-27.9 F)
1980
-27.2 C (-17.0 F)
1981
-22.2 C (-8.0 F)
1982
-28.3 C (-18.9 F)
1983
-29.4 C (-20.9 F)
1984
-22.8 C (-9.0 F)
1985
-25.6 C (-14.1 F)
1986
-17.8 C (0.0 F)
1987
-22.8 C (-9.0 F)
1988
-21.1 C (-6.0 F)
1989
-30.0 C (-22.0 F)
1990
-31.1 C (-24.0 F)
1991
-18.3 C (-0.9 F)
1992
-17.8 C (0.0 F)
1993
-27.2 C (-17.0 F)
1994
-26.1 C (-15.0 F)
1995
-18.9 C (-2.0 F)
1996
-28.9 C (-20.0 F)
1997
-22.2 C (-8.0 F)
1998
-25.0 C (-13.0 F)
1999
-15.6 C (3.9 F)
2000
-17.2 C (1.0 F)
2001
-13.9 C (7.0 F)
2002
-18.9 C (-2.0 F)
2003
-17.2 C (1.0 F)
2004
-28.3 C (-18.9 F)
2005
-23.3 C (-9.9 F)
2006
-22.2 C (-8.0 F)
2007
-18.9 C (-2.0 F)
2008
-24.4 C (-11.9 F)
2009
-22.8 C (-9.0 F)
2010
-22.2 C (-8.0 F)
2011
-21.7 C (-7.1 F)
2012
-11.1 C (12.0 F)
2013
-22.8 C (-9.0 F)
2014
-27.2 C (-17.0 F)
2015
-18.9 C (-2.0 F)
2016
-22.2 C (-8.0 F)
2017
-20.6 C (-5.1 F)
2018
-15.0 C (5.0 F)
Wettest day (Rx1day)
The wettest day of the year at Superior, 1914 to 2018. The record is 58.4 mm (2.3 in) in 2015, marked on the chart; the median year is 25.4 mm (1.0 in).
Wettest day (Rx1day) at Superior by year
Year
Wettest day (Rx1day)
1914
15.2 mm (0.6 in)
1915
25.9 mm (1.0 in)
1916
30.7 mm (1.2 in)
1917
31.8 mm (1.3 in)
1918
23.6 mm (0.9 in)
1919
25.4 mm (1.0 in)
1920
30.5 mm (1.2 in)
1921
17.8 mm (0.7 in)
1923
24.6 mm (1.0 in)
1924
24.6 mm (1.0 in)
1925
30.2 mm (1.2 in)
1926
25.4 mm (1.0 in)
1927
17.8 mm (0.7 in)
1928
19.8 mm (0.8 in)
1929
14.5 mm (0.6 in)
1930
29.7 mm (1.2 in)
1931
20.3 mm (0.8 in)
1932
25.4 mm (1.0 in)
1933
34.8 mm (1.4 in)
1934
15.2 mm (0.6 in)
1935
16.0 mm (0.6 in)
1936
17.0 mm (0.7 in)
1937
25.4 mm (1.0 in)
1938
19.6 mm (0.8 in)
1939
17.8 mm (0.7 in)
1940
17.8 mm (0.7 in)
1941
27.9 mm (1.1 in)
1942
32.0 mm (1.3 in)
1943
17.0 mm (0.7 in)
1944
25.4 mm (1.0 in)
1945
22.4 mm (0.9 in)
1946
27.2 mm (1.1 in)
1947
42.9 mm (1.7 in)
1948
25.4 mm (1.0 in)
1949
29.7 mm (1.2 in)
1950
25.9 mm (1.0 in)
1951
23.9 mm (0.9 in)
1952
37.6 mm (1.5 in)
1953
51.8 mm (2.0 in)
1954
22.9 mm (0.9 in)
1955
29.7 mm (1.2 in)
1956
26.7 mm (1.1 in)
1957
46.7 mm (1.8 in)
1958
33.3 mm (1.3 in)
1959
31.0 mm (1.2 in)
1960
22.1 mm (0.9 in)
1961
21.1 mm (0.8 in)
1962
23.4 mm (0.9 in)
1963
21.1 mm (0.8 in)
1964
39.6 mm (1.6 in)
1965
38.6 mm (1.5 in)
1966
32.8 mm (1.3 in)
1967
13.7 mm (0.5 in)
1968
18.0 mm (0.7 in)
1969
30.7 mm (1.2 in)
1970
20.1 mm (0.8 in)
1971
35.8 mm (1.4 in)
1972
25.1 mm (1.0 in)
1973
33.3 mm (1.3 in)
1974
35.3 mm (1.4 in)
1975
16.8 mm (0.7 in)
1976
21.1 mm (0.8 in)
1977
31.5 mm (1.2 in)
1978
22.9 mm (0.9 in)
1979
25.4 mm (1.0 in)
1980
36.1 mm (1.4 in)
1981
21.3 mm (0.8 in)
1982
18.0 mm (0.7 in)
1983
24.1 mm (0.9 in)
1984
30.5 mm (1.2 in)
1985
44.5 mm (1.8 in)
1986
36.8 mm (1.4 in)
1987
31.0 mm (1.2 in)
1988
16.8 mm (0.7 in)
1989
21.1 mm (0.8 in)
1990
16.8 mm (0.7 in)
1991
38.4 mm (1.5 in)
1992
39.1 mm (1.5 in)
1993
20.3 mm (0.8 in)
1994
38.4 mm (1.5 in)
1995
18.3 mm (0.7 in)
1996
28.4 mm (1.1 in)
1997
24.9 mm (1.0 in)
1998
42.9 mm (1.7 in)
1999
22.1 mm (0.9 in)
2000
35.6 mm (1.4 in)
2001
40.1 mm (1.6 in)
2002
34.5 mm (1.4 in)
2003
18.0 mm (0.7 in)
2004
31.2 mm (1.2 in)
2005
44.2 mm (1.7 in)
2006
39.4 mm (1.6 in)
2007
21.8 mm (0.9 in)
2008
36.1 mm (1.4 in)
2009
17.8 mm (0.7 in)
2010
22.9 mm (0.9 in)
2011
20.3 mm (0.8 in)
2012
25.7 mm (1.0 in)
2013
20.3 mm (0.8 in)
2014
35.6 mm (1.4 in)
2015
58.4 mm (2.3 in)
2016
47.0 mm (1.9 in)
2017
12.7 mm (0.5 in)
2018
20.3 mm (0.8 in)
Wettest five days (Rx5day)
The wettest five days of the year at Superior, 1914 to 2018. The record is 118.9 mm (4.7 in) in 2015, marked on the chart; the median year is 43.0 mm (1.7 in).
Wettest five days (Rx5day) at Superior by year
Year
Wettest five days (Rx5day)
1914
30.5 mm (1.2 in)
1915
50.2 mm (2.0 in)
1916
30.8 mm (1.2 in)
1917
80.0 mm (3.1 in)
1918
38.6 mm (1.5 in)
1919
30.5 mm (1.2 in)
1920
43.0 mm (1.7 in)
1921
34.2 mm (1.3 in)
1923
44.0 mm (1.7 in)
1924
41.1 mm (1.6 in)
1925
47.1 mm (1.9 in)
1926
32.0 mm (1.3 in)
1927
48.1 mm (1.9 in)
1928
29.5 mm (1.2 in)
1929
38.8 mm (1.5 in)
1930
34.6 mm (1.4 in)
1931
41.9 mm (1.6 in)
1932
35.1 mm (1.4 in)
1933
69.2 mm (2.7 in)
1934
49.6 mm (2.0 in)
1935
30.5 mm (1.2 in)
1936
39.1 mm (1.5 in)
1937
31.0 mm (1.2 in)
1938
54.2 mm (2.1 in)
1939
38.1 mm (1.5 in)
1940
36.6 mm (1.4 in)
1941
40.5 mm (1.6 in)
1942
55.8 mm (2.2 in)
1943
40.4 mm (1.6 in)
1944
44.8 mm (1.8 in)
1945
35.5 mm (1.4 in)
1946
46.2 mm (1.8 in)
1947
44.4 mm (1.7 in)
1948
44.7 mm (1.8 in)
1949
38.4 mm (1.5 in)
1950
54.7 mm (2.2 in)
1951
44.7 mm (1.8 in)
1952
45.2 mm (1.8 in)
1953
62.0 mm (2.4 in)
1954
33.5 mm (1.3 in)
1955
56.4 mm (2.2 in)
1956
40.4 mm (1.6 in)
1957
78.8 mm (3.1 in)
1958
34.8 mm (1.4 in)
1959
39.0 mm (1.5 in)
1960
40.7 mm (1.6 in)
1961
48.8 mm (1.9 in)
1962
63.6 mm (2.5 in)
1963
40.4 mm (1.6 in)
1964
95.4 mm (3.8 in)
1965
52.6 mm (2.1 in)
1966
80.1 mm (3.2 in)
1967
27.7 mm (1.1 in)
1968
48.9 mm (1.9 in)
1969
53.7 mm (2.1 in)
1970
40.2 mm (1.6 in)
1971
60.9 mm (2.4 in)
1972
47.0 mm (1.9 in)
1973
43.5 mm (1.7 in)
1974
92.7 mm (3.6 in)
1975
39.4 mm (1.6 in)
1976
33.8 mm (1.3 in)
1977
35.1 mm (1.4 in)
1978
37.8 mm (1.5 in)
1979
32.7 mm (1.3 in)
1980
97.5 mm (3.8 in)
1981
30.1 mm (1.2 in)
1982
40.3 mm (1.6 in)
1983
40.7 mm (1.6 in)
1984
34.5 mm (1.4 in)
1985
63.1 mm (2.5 in)
1986
55.6 mm (2.2 in)
1987
40.4 mm (1.6 in)
1988
37.2 mm (1.5 in)
1989
27.4 mm (1.1 in)
1990
33.7 mm (1.3 in)
1991
47.5 mm (1.9 in)
1992
51.4 mm (2.0 in)
1993
35.1 mm (1.4 in)
1994
53.1 mm (2.1 in)
1995
37.1 mm (1.5 in)
1996
56.4 mm (2.2 in)
1997
67.1 mm (2.6 in)
1998
67.7 mm (2.7 in)
1999
37.4 mm (1.5 in)
2000
69.7 mm (2.7 in)
2001
66.3 mm (2.6 in)
2002
48.7 mm (1.9 in)
2003
32.5 mm (1.3 in)
2004
49.5 mm (1.9 in)
2005
57.9 mm (2.3 in)
2006
48.8 mm (1.9 in)
2007
50.5 mm (2.0 in)
2008
48.2 mm (1.9 in)
2009
43.8 mm (1.7 in)
2010
35.6 mm (1.4 in)
2011
32.5 mm (1.3 in)
2012
55.9 mm (2.2 in)
2013
22.6 mm (0.9 in)
2014
40.4 mm (1.6 in)
2015
118.9 mm (4.7 in)
2016
73.1 mm (2.9 in)
2017
n/a
2018
26.0 mm (1.0 in)
Longest dry spell (CDD)
The longest dry spell of the year at Superior, 1914 to 2018. The record is 108 days in 1931, marked on the chart; the median year is 28 days.
Longest dry spell (CDD) at Superior by year
Year
Longest dry spell (CDD)
1914
17 days
1915
14 days
1916
16 days
1917
40 days
1918
18 days
1919
16 days
1920
18 days
1921
18 days
1923
30 days
1924
36 days
1925
20 days
1926
40 days
1927
21 days
1928
33 days
1929
33 days
1930
48 days
1931
108 days
1932
27 days
1933
33 days
1934
33 days
1935
25 days
1936
29 days
1937
25 days
1938
21 days
1939
46 days
1940
31 days
1941
24 days
1942
44 days
1943
32 days
1944
27 days
1945
23 days
1946
27 days
1947
20 days
1948
34 days
1949
22 days
1950
18 days
1951
37 days
1952
47 days
1953
35 days
1954
34 days
1955
50 days
1956
21 days
1957
17 days
1958
28 days
1959
23 days
1960
31 days
1961
38 days
1962
23 days
1963
27 days
1964
18 days
1965
22 days
1966
19 days
1967
84 days
1968
21 days
1969
77 days
1970
29 days
1971
23 days
1972
20 days
1973
33 days
1974
35 days
1975
27 days
1976
29 days
1977
36 days
1978
30 days
1979
35 days
1980
34 days
1981
37 days
1982
20 days
1983
17 days
1984
35 days
1985
53 days
1986
25 days
1987
60 days
1988
41 days
1989
18 days
1990
35 days
1991
36 days
1992
25 days
1993
21 days
1994
36 days
1995
23 days
1996
32 days
1997
21 days
1998
26 days
1999
38 days
2000
32 days
2001
32 days
2002
28 days
2003
25 days
2004
16 days
2005
39 days
2006
39 days
2007
23 days
2008
19 days
2009
29 days
2010
21 days
2011
39 days
2012
42 days
2013
24 days
2014
15 days
2015
16 days
2016
8 days
2017
3 days
2018
9 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
78 years with a frost
Across 78 years with a frost, the median last spring frost at Superior falls on 22 May and the median first autumn frost on 14 September, which leaves a median of 117 days between them.
In 1978 to 2014 the median growing season was 123 days. That is 25 days more than in 1924 to 1959.
Fitted over all years, the growing season changes by +5.0 days per decade at this station.
Frost dates and growing season at Superior
Measure
Median, all years
Earliest period (1924 to 1959)
Recent period (1978 to 2014)
Recent against earliest
Fitted trend
Last spring frost
22 May
3 June
13 May
21 days earlier
-2.2 days per decade
First autumn frost
14 September
7 September
20 September
13 days later
+2.7 days per decade
Growing days
117 days
98 days
123 days
25 days more
+5.0 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
88 years, 1917 to 2012
A day with at least 26.5 mm (1.0 in) of rain is expected about once in 2 years. A day with at least 53.1 mm (2.1 in) of rain is expected about once in 100 years.
Rainfall return levels at Superior: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
26.5 mm (1.0 in)
5 years
34.5 mm (1.4 in)
10 years
39.4 mm (1.6 in)
25 years
45.2 mm (1.8 in)
50 years
49.3 mm (1.9 in)
100 years
53.1 mm (2.1 in)
Longer than the 88 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, 88 years of values from 1917 to 2012.
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: 51.8 mm (2.0 in) in 1953; 46.7 mm (1.8 in) in 1957; 44.5 mm (1.8 in) in 1985.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Superior standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Superior 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.