Record envelope, standing records and threshold days for Hiawatha (USC00423896), Utah, United States, with 77 years of record.
Key Facts for Hiawatha
Hiawatha (USC00423896) is a weather station in Utah, United States at 39.48 latitude and -111.02 longitude, 2,219 m (7,280 ft) above sea level.
The station reports from 1916 to 1992, 77 years of record.
1,464 records set at Hiawatha still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Hiawatha set a daily record low minimum temperature of 6.1 C (43.0 F) on 15 July 1992.
About the Station
Location: Utah, United States, 39.48 latitude, -111.02 longitude.
Elevation: 2,219 m (7,280 ft).
Period of record: 1916 to 1992, 77 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 Hiawatha. 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 Hiawatha, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
15.0 C (59.0 F)
-26.7 C (-16.1 F)
n/a
n/a
Feb
15.0 C (59.0 F)
-27.8 C (-18.0 F)
n/a
n/a
Mar
20.0 C (68.0 F)
-23.3 C (-9.9 F)
n/a
n/a
Apr
26.7 C (80.1 F)
-13.9 C (7.0 F)
n/a
n/a
May
30.0 C (86.0 F)
-7.8 C (18.0 F)
n/a
n/a
Jun
33.9 C (93.0 F)
-3.3 C (26.1 F)
n/a
n/a
Jul
35.0 C (95.0 F)
1.1 C (34.0 F)
n/a
n/a
Aug
33.9 C (93.0 F)
0.6 C (33.1 F)
n/a
n/a
Sep
33.3 C (91.9 F)
-7.2 C (19.0 F)
n/a
n/a
Oct
26.7 C (80.1 F)
-12.8 C (9.0 F)
n/a
n/a
Nov
21.1 C (70.0 F)
-18.9 C (-2.0 F)
n/a
n/a
Dec
14.4 C (57.9 F)
-25.0 C (-13.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Hiawatha still stand. 1934 holds the most, with 44.
Standing records at Hiawatha by the year they were set
Year set
Standing records
1921
13
1922
27
1923
13
1924
38
1925
14
1926
13
1927
18
1928
23
1929
30
1930
17
1931
41
1932
22
1933
38
1934
44
1935
18
1936
25
1937
22
1938
17
1939
18
1940
32
1941
9
1942
18
1943
25
1944
9
1945
14
1946
13
1947
16
1948
20
1949
19
1950
33
1951
6
1952
17
1953
8
1954
26
1955
27
1956
12
1957
15
1958
31
1959
17
1960
22
1961
9
1962
38
1963
18
1964
20
1965
33
1966
15
1967
18
1968
18
1969
31
1970
26
1971
43
1972
15
1973
7
1974
12
1975
22
1976
18
1977
30
1978
20
1979
21
1980
20
1981
11
1982
16
1983
16
1984
27
1985
18
1986
20
1987
7
1988
14
1989
21
1990
20
1991
16
1992
4
All-Time Record Progression
1 new records
1 all-time records were set at Hiawatha between 30 December 1951 and 30 December 1951. Each dot is a new record.
When Hiawatha set new all-time records
Date
Kind
Detail
1951-12-30
Record snow depth
Record snow depth 86.4 cm (34.0 in)
Wettest Day of Each Month
Jun: 54.4 mm (2.1 in)
The wettest day on record for each calendar month at Hiawatha. The most was 54.4 mm (2.1 in) on 7 June 1941.
Record daily precipitation for each month at Hiawatha
Month
Record daily precipitation (mm)
Date
Jan
27.9 mm (1.1 in)
30 January 1988
Feb
35.6 mm (1.4 in)
18 February 1980
Mar
30.5 mm (1.2 in)
3 March 1935
Apr
33.8 mm (1.3 in)
20 April 1944
May
50.8 mm (2.0 in)
10 May 1922
Jun
54.4 mm (2.1 in)
7 June 1941
Jul
46.5 mm (1.8 in)
21 July 1985
Aug
52.1 mm (2.1 in)
24 August 1946
Sep
43.9 mm (1.7 in)
9 September 1961
Oct
48.3 mm (1.9 in)
2 October 1984
Nov
34.3 mm (1.4 in)
22 November 1943
Dec
38.9 mm (1.5 in)
25 December 1916
Period of Record Coverage
1921 to 1992
Complete yearUnder 90 percent of days
72 years of record at Hiawatha, 1921 to 1992. 16 years have data for under 90 percent of days and are left out of rankings: 1921, 1925, 1964, 1965, 1966, 1971, 1972, 1973 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 54 complete years at Hiawatha, 1922 to 1991. Blue stripes are years cooler than the station's own mean of 7.2 C (45.0 F); red stripes are warmer. The coolest year was 1982, at 5.2 C (41.4 F), and the warmest was 1934, at 9.6 C (49.3 F). The strongest colour marks a difference of 2.4 C (4.3 F).
Annual mean temperature at Hiawatha as warming stripes, 1922 to 1991
Year
Annual mean temperature
Difference from the station mean
1922
6.2 C
-0.99 C
1923
6.0 C
-1.22 C
1924
6.6 C
-0.63 C
1926
7.6 C
+0.32 C
1927
6.5 C
-0.73 C
1928
7.4 C
+0.12 C
1929
6.4 C
-0.79 C
1930
6.8 C
-0.41 C
1931
7.4 C
+0.19 C
1932
6.5 C
-0.70 C
1933
7.2 C
-0.06 C
1934
9.6 C
+2.38 C
1935
7.5 C
+0.25 C
1938
7.1 C
-0.09 C
1939
8.0 C
+0.75 C
1942
7.6 C
+0.36 C
1943
8.2 C
+0.97 C
1944
7.0 C
-0.26 C
1945
6.8 C
-0.39 C
1946
7.8 C
+0.54 C
1947
7.8 C
+0.53 C
1948
7.3 C
+0.08 C
1949
7.4 C
+0.13 C
1950
8.0 C
+0.79 C
1951
7.0 C
-0.20 C
1952
7.0 C
-0.20 C
1953
8.1 C
+0.84 C
1954
8.9 C
+1.63 C
1955
6.9 C
-0.37 C
1956
8.2 C
+1.00 C
1957
6.7 C
-0.52 C
1958
8.7 C
+1.47 C
1959
8.2 C
+0.92 C
1960
8.0 C
+0.80 C
1961
7.5 C
+0.28 C
1962
8.1 C
+0.89 C
1965
6.2 C
-1.01 C
1967
7.3 C
+0.06 C
1968
6.6 C
-0.64 C
1969
7.3 C
+0.07 C
1970
7.3 C
+0.02 C
1975
6.0 C
-1.24 C
1977
8.4 C
+1.19 C
1980
7.0 C
-0.27 C
1981
7.4 C
+0.19 C
1982
5.2 C
-2.02 C
1983
5.9 C
-1.33 C
1984
5.7 C
-1.57 C
1986
7.4 C
+0.21 C
1987
6.8 C
-0.45 C
1988
7.1 C
-0.16 C
1989
7.4 C
+0.20 C
1990
7.1 C
-0.13 C
1991
6.3 C
-0.92 C
The fitted trend in annual mean temperature here over 1922 to 1991 is -0.1 C (-0.2 to 0.1) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.3 to 0.1) per decade. The slope is a straight line fitted to 54 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Hiawatha
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.1 C (-0.2 to 0.1) per decade
-0.1 F (-0.3 to 0.1) per decade
1922 to 1991
54
Not clearly different from zero
Mean daily maximum
0.01 C (-0.13 to 0.14) per decade
0.01 F (-0.23 to 0.25) per decade
1922 to 1991
54
Not clearly different from zero
Mean daily minimum
-0.12 C (-0.22 to -0.02) per decade
-0.21 F (-0.39 to -0.03) per decade
1922 to 1991
54
Fall
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
1916 to 1992
Yearly extremes at Hiawatha: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
35.0 C (95.0 F)
1931
31.7 C (89.1 F)
72
Coldest night (TNn)
-27.8 C (-18.0 F)
1933
-20.0 C (-4.0 F)
72
Wettest day (Rx1day)
54.4 mm (2.1 in)
1941
27.9 mm (1.1 in)
77
Wettest five days (Rx5day)
90.9 mm (3.6 in)
1960
49.6 mm (2.0 in)
77
Longest dry spell (CDD)
91 days
1972
39 days
77
Hottest day (TXx)
The hottest day of the year at Hiawatha, 1916 to 1992. The record is 35.0 C (95.0 F) in 1931, marked on the chart; the median year is 31.7 C (89.1 F).
Hottest day (TXx) at Hiawatha by year
Year
Hottest day (TXx)
1916
n/a
1917
n/a
1918
n/a
1919
n/a
1920
n/a
1921
27.8 C (82.0 F)
1922
33.3 C (91.9 F)
1923
31.1 C (88.0 F)
1924
32.2 C (90.0 F)
1925
33.3 C (91.9 F)
1926
31.1 C (88.0 F)
1927
30.6 C (87.1 F)
1928
30.6 C (87.1 F)
1929
31.1 C (88.0 F)
1930
32.2 C (90.0 F)
1931
35.0 C (95.0 F)
1932
32.2 C (90.0 F)
1933
32.2 C (90.0 F)
1934
33.3 C (91.9 F)
1935
31.1 C (88.0 F)
1936
32.8 C (91.0 F)
1937
31.7 C (89.1 F)
1938
33.3 C (91.9 F)
1939
33.9 C (93.0 F)
1940
33.9 C (93.0 F)
1941
31.1 C (88.0 F)
1942
31.7 C (89.1 F)
1943
31.1 C (88.0 F)
1944
30.6 C (87.1 F)
1945
30.6 C (87.1 F)
1946
32.8 C (91.0 F)
1947
31.1 C (88.0 F)
1948
32.2 C (90.0 F)
1949
32.2 C (90.0 F)
1950
31.1 C (88.0 F)
1951
30.6 C (87.1 F)
1952
31.7 C (89.1 F)
1953
32.8 C (91.0 F)
1954
32.8 C (91.0 F)
1955
31.7 C (89.1 F)
1956
31.1 C (88.0 F)
1957
31.1 C (88.0 F)
1958
32.2 C (90.0 F)
1959
31.7 C (89.1 F)
1960
33.3 C (91.9 F)
1961
33.9 C (93.0 F)
1962
32.2 C (90.0 F)
1963
31.1 C (88.0 F)
1964
32.2 C (90.0 F)
1965
28.9 C (84.0 F)
1966
30.6 C (87.1 F)
1967
31.7 C (89.1 F)
1968
31.1 C (88.0 F)
1969
32.2 C (90.0 F)
1970
33.3 C (91.9 F)
1971
34.4 C (93.9 F)
1972
23.3 C (73.9 F)
1973
30.6 C (87.1 F)
1974
32.2 C (90.0 F)
1975
31.1 C (88.0 F)
1976
33.9 C (93.0 F)
1977
32.2 C (90.0 F)
1978
33.3 C (91.9 F)
1979
31.7 C (89.1 F)
1980
31.1 C (88.0 F)
1981
31.7 C (89.1 F)
1982
30.0 C (86.0 F)
1983
28.9 C (84.0 F)
1984
31.7 C (89.1 F)
1985
32.8 C (91.0 F)
1986
31.1 C (88.0 F)
1987
29.4 C (84.9 F)
1988
31.1 C (88.0 F)
1989
32.8 C (91.0 F)
1990
31.7 C (89.1 F)
1991
30.6 C (87.1 F)
1992
30.0 C (86.0 F)
Coldest night (TNn)
The coldest night of the year at Hiawatha, 1916 to 1992. The record is -27.8 C (-18.0 F) in 1933, marked on the chart; the median year is -20.0 C (-4.0 F).
Coldest night (TNn) at Hiawatha by year
Year
Coldest night (TNn)
1916
n/a
1917
n/a
1918
n/a
1919
n/a
1920
n/a
1921
-17.2 C (1.0 F)
1922
-20.0 C (-4.0 F)
1923
-17.8 C (0.0 F)
1924
-24.4 C (-11.9 F)
1925
-18.3 C (-0.9 F)
1926
-19.4 C (-2.9 F)
1927
-18.3 C (-0.9 F)
1928
-16.1 C (3.0 F)
1929
-22.2 C (-8.0 F)
1930
-22.8 C (-9.0 F)
1931
-19.4 C (-2.9 F)
1932
-21.7 C (-7.1 F)
1933
-27.8 C (-18.0 F)
1934
-15.0 C (5.0 F)
1935
-22.8 C (-9.0 F)
1936
-18.9 C (-2.0 F)
1937
-24.4 C (-11.9 F)
1938
-16.1 C (3.0 F)
1939
-21.1 C (-6.0 F)
1940
-21.7 C (-7.1 F)
1941
-16.1 C (3.0 F)
1942
-22.2 C (-8.0 F)
1943
-21.1 C (-6.0 F)
1944
-18.9 C (-2.0 F)
1945
-17.2 C (1.0 F)
1946
-17.2 C (1.0 F)
1947
-17.2 C (1.0 F)
1948
-19.4 C (-2.9 F)
1949
-21.1 C (-6.0 F)
1950
-21.1 C (-6.0 F)
1951
-23.3 C (-9.9 F)
1952
-20.0 C (-4.0 F)
1953
-16.7 C (1.9 F)
1954
-15.6 C (3.9 F)
1955
-21.1 C (-6.0 F)
1956
-20.6 C (-5.1 F)
1957
-17.8 C (0.0 F)
1958
-15.0 C (5.0 F)
1959
-18.9 C (-2.0 F)
1960
-19.4 C (-2.9 F)
1961
-20.6 C (-5.1 F)
1962
-23.3 C (-9.9 F)
1963
-21.7 C (-7.1 F)
1964
-23.3 C (-9.9 F)
1965
-17.2 C (1.0 F)
1966
-18.3 C (-0.9 F)
1967
-19.4 C (-2.9 F)
1968
-20.0 C (-4.0 F)
1969
-18.9 C (-2.0 F)
1970
-17.8 C (0.0 F)
1971
-26.7 C (-16.1 F)
1972
-23.3 C (-9.9 F)
1973
-18.9 C (-2.0 F)
1974
-21.1 C (-6.0 F)
1975
-21.1 C (-6.0 F)
1976
-20.6 C (-5.1 F)
1977
-20.0 C (-4.0 F)
1978
-24.4 C (-11.9 F)
1979
-23.3 C (-9.9 F)
1980
-16.1 C (3.0 F)
1981
-17.8 C (0.0 F)
1982
-23.9 C (-11.0 F)
1983
-17.8 C (0.0 F)
1984
-25.0 C (-13.0 F)
1985
-25.0 C (-13.0 F)
1986
-17.8 C (0.0 F)
1987
-19.4 C (-2.9 F)
1988
-20.0 C (-4.0 F)
1989
-26.7 C (-16.1 F)
1990
-25.0 C (-13.0 F)
1991
-17.2 C (1.0 F)
1992
-16.1 C (3.0 F)
Wettest day (Rx1day)
The wettest day of the year at Hiawatha, 1916 to 1992. The record is 54.4 mm (2.1 in) in 1941, marked on the chart; the median year is 27.9 mm (1.1 in).
Wettest day (Rx1day) at Hiawatha by year
Year
Wettest day (Rx1day)
1916
38.9 mm (1.5 in)
1917
22.9 mm (0.9 in)
1918
27.9 mm (1.1 in)
1919
26.7 mm (1.1 in)
1920
17.8 mm (0.7 in)
1921
13.7 mm (0.5 in)
1922
50.8 mm (2.0 in)
1923
32.8 mm (1.3 in)
1924
13.2 mm (0.5 in)
1925
33.0 mm (1.3 in)
1926
20.6 mm (0.8 in)
1927
39.4 mm (1.6 in)
1928
34.8 mm (1.4 in)
1929
39.4 mm (1.6 in)
1930
33.8 mm (1.3 in)
1931
8.4 mm (0.33 in)
1932
20.1 mm (0.8 in)
1933
22.6 mm (0.9 in)
1934
18.8 mm (0.7 in)
1935
34.0 mm (1.3 in)
1936
27.9 mm (1.1 in)
1937
49.0 mm (1.9 in)
1938
23.4 mm (0.9 in)
1939
22.9 mm (0.9 in)
1940
28.2 mm (1.1 in)
1941
54.4 mm (2.1 in)
1942
26.2 mm (1.0 in)
1943
34.3 mm (1.4 in)
1944
33.8 mm (1.3 in)
1945
15.7 mm (0.6 in)
1946
52.1 mm (2.1 in)
1947
40.6 mm (1.6 in)
1948
39.1 mm (1.5 in)
1949
31.2 mm (1.2 in)
1950
26.2 mm (1.0 in)
1951
35.1 mm (1.4 in)
1952
38.9 mm (1.5 in)
1953
24.1 mm (0.9 in)
1954
23.1 mm (0.9 in)
1955
20.3 mm (0.8 in)
1956
15.5 mm (0.6 in)
1957
47.8 mm (1.9 in)
1958
24.1 mm (0.9 in)
1959
21.8 mm (0.9 in)
1960
34.3 mm (1.4 in)
1961
43.9 mm (1.7 in)
1962
36.3 mm (1.4 in)
1963
24.1 mm (0.9 in)
1964
36.3 mm (1.4 in)
1965
35.8 mm (1.4 in)
1966
26.7 mm (1.1 in)
1967
22.9 mm (0.9 in)
1968
35.3 mm (1.4 in)
1969
27.7 mm (1.1 in)
1970
38.1 mm (1.5 in)
1971
26.2 mm (1.0 in)
1972
14.7 mm (0.6 in)
1973
30.5 mm (1.2 in)
1974
29.5 mm (1.2 in)
1975
17.3 mm (0.7 in)
1976
25.7 mm (1.0 in)
1977
22.9 mm (0.9 in)
1978
26.9 mm (1.1 in)
1979
22.1 mm (0.9 in)
1980
35.6 mm (1.4 in)
1981
38.6 mm (1.5 in)
1982
32.3 mm (1.3 in)
1983
32.8 mm (1.3 in)
1984
48.3 mm (1.9 in)
1985
46.5 mm (1.8 in)
1986
29.2 mm (1.1 in)
1987
27.9 mm (1.1 in)
1988
27.9 mm (1.1 in)
1989
22.9 mm (0.9 in)
1990
25.4 mm (1.0 in)
1991
38.1 mm (1.5 in)
1992
18.8 mm (0.7 in)
Wettest five days (Rx5day)
The wettest five days of the year at Hiawatha, 1916 to 1992. The record is 90.9 mm (3.6 in) in 1960, marked on the chart; the median year is 49.6 mm (2.0 in).
Wettest five days (Rx5day) at Hiawatha by year
Year
Wettest five days (Rx5day)
1916
56.7 mm (2.2 in)
1917
38.7 mm (1.5 in)
1918
63.6 mm (2.5 in)
1919
49.6 mm (2.0 in)
1920
28.0 mm (1.1 in)
1921
39.3 mm (1.5 in)
1922
77.3 mm (3.0 in)
1923
35.3 mm (1.4 in)
1924
35.8 mm (1.4 in)
1925
53.1 mm (2.1 in)
1926
29.8 mm (1.2 in)
1927
43.2 mm (1.7 in)
1928
78.2 mm (3.1 in)
1929
65.3 mm (2.6 in)
1930
75.2 mm (3.0 in)
1931
17.6 mm (0.7 in)
1932
35.4 mm (1.4 in)
1933
39.4 mm (1.6 in)
1934
31.0 mm (1.2 in)
1935
44.9 mm (1.8 in)
1936
62.4 mm (2.5 in)
1937
50.8 mm (2.0 in)
1938
45.8 mm (1.8 in)
1939
36.6 mm (1.4 in)
1940
62.3 mm (2.5 in)
1941
66.0 mm (2.6 in)
1942
51.8 mm (2.0 in)
1943
39.1 mm (1.5 in)
1944
46.5 mm (1.8 in)
1945
37.5 mm (1.5 in)
1946
57.7 mm (2.3 in)
1947
62.2 mm (2.4 in)
1948
42.1 mm (1.7 in)
1949
64.6 mm (2.5 in)
1950
48.0 mm (1.9 in)
1951
63.3 mm (2.5 in)
1952
63.3 mm (2.5 in)
1953
49.7 mm (2.0 in)
1954
33.4 mm (1.3 in)
1955
28.1 mm (1.1 in)
1956
37.8 mm (1.5 in)
1957
67.6 mm (2.7 in)
1958
40.9 mm (1.6 in)
1959
23.1 mm (0.9 in)
1960
90.9 mm (3.6 in)
1961
67.3 mm (2.6 in)
1962
42.7 mm (1.7 in)
1963
38.0 mm (1.5 in)
1964
67.0 mm (2.6 in)
1965
45.7 mm (1.8 in)
1966
51.8 mm (2.0 in)
1967
51.4 mm (2.0 in)
1968
53.6 mm (2.1 in)
1969
46.0 mm (1.8 in)
1970
51.6 mm (2.0 in)
1971
51.8 mm (2.0 in)
1972
20.8 mm (0.8 in)
1973
44.9 mm (1.8 in)
1974
53.8 mm (2.1 in)
1975
39.3 mm (1.5 in)
1976
58.0 mm (2.3 in)
1977
50.2 mm (2.0 in)
1978
52.1 mm (2.1 in)
1979
40.9 mm (1.6 in)
1980
70.7 mm (2.8 in)
1981
51.3 mm (2.0 in)
1982
54.0 mm (2.1 in)
1983
70.4 mm (2.8 in)
1984
69.9 mm (2.8 in)
1985
76.7 mm (3.0 in)
1986
48.0 mm (1.9 in)
1987
45.2 mm (1.8 in)
1988
31.5 mm (1.2 in)
1989
26.7 mm (1.1 in)
1990
36.6 mm (1.4 in)
1991
58.1 mm (2.3 in)
1992
33.8 mm (1.3 in)
Longest dry spell (CDD)
The longest dry spell of the year at Hiawatha, 1916 to 1992. The record is 91 days in 1972, marked on the chart; the median year is 39 days.
Longest dry spell (CDD) at Hiawatha by year
Year
Longest dry spell (CDD)
1916
49 days
1917
54 days
1918
47 days
1919
43 days
1920
12 days
1921
32 days
1922
39 days
1923
34 days
1924
49 days
1925
29 days
1926
42 days
1927
58 days
1928
31 days
1929
63 days
1930
44 days
1931
30 days
1932
48 days
1933
38 days
1934
40 days
1935
52 days
1936
36 days
1937
47 days
1938
47 days
1939
33 days
1940
44 days
1941
25 days
1942
74 days
1943
26 days
1944
38 days
1945
38 days
1946
57 days
1947
30 days
1948
31 days
1949
32 days
1950
55 days
1951
27 days
1952
53 days
1953
44 days
1954
43 days
1955
48 days
1956
52 days
1957
31 days
1958
54 days
1959
46 days
1960
39 days
1961
64 days
1962
33 days
1963
40 days
1964
49 days
1965
30 days
1966
47 days
1967
44 days
1968
48 days
1969
34 days
1970
41 days
1971
84 days
1972
91 days
1973
26 days
1974
78 days
1975
23 days
1976
50 days
1977
63 days
1978
35 days
1979
43 days
1980
37 days
1981
28 days
1982
25 days
1983
19 days
1984
26 days
1985
31 days
1986
30 days
1987
26 days
1988
31 days
1989
33 days
1990
30 days
1991
39 days
1992
34 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
54 years with a frost
Across 54 years with a frost, the median last spring frost at Hiawatha falls on 26 May and the median first autumn frost on 4 October, which leaves a median of 130 days between them.
Fitted over all years, the growing season changes by -3.0 days per decade at this station.
Frost dates and growing season at Hiawatha
Measure
Median, all years
Earliest period
Recent period (1951 to 1991)
Recent against earliest
Fitted trend
Last spring frost
26 May
n/a
27 May
n/a
+1.7 days per decade
First autumn frost
4 October
n/a
30 September
n/a
-1.3 days per decade
Growing days
130 days
n/a
126 days
n/a
-3.0 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
68 years, 1917 to 1991
A day with at least 29.9 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 56.9 mm (2.2 in) of rain is expected about once in 100 years.
Rainfall return levels at Hiawatha: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
29.9 mm (1.2 in)
5 years
38.8 mm (1.5 in)
10 years
43.9 mm (1.7 in)
25 years
49.7 mm (2.0 in)
50 years
53.5 mm (2.1 in)
100 years
56.9 mm (2.2 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 1917 to 1991.
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: 54.4 mm (2.1 in) in 1941; 52.1 mm (2.1 in) in 1946; 50.8 mm (2.0 in) in 1922.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Hiawatha, at 1980. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1980 ran 0.5 C (0.9 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at Hiawatha, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1980
-0.5
-0.9
likely
5
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Download the Data
Data for Hiawatha standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Hiawatha 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.