Record envelope, standing records and threshold days for Ishpeming (USC00204127), Michigan, United States, with 90 years of record.
Key Facts for Ishpeming
Ishpeming (USC00204127) is a weather station in Michigan, United States at 46.48 latitude and -87.65 longitude, 439 m (1,440 ft) above sea level.
The station reports from 1898 to 1987, 90 years of record.
1,464 records set at Ishpeming still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Ishpeming tied a daily record low minimum temperature of -6.7 C (19.9 F) on 25 October 1987.
About the Station
Location: Michigan, United States, 46.48 latitude, -87.65 longitude.
Elevation: 439 m (1,440 ft).
Period of record: 1898 to 1987, 90 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 Ishpeming. 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 Ishpeming, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
13.3 C (55.9 F)
-35.6 C (-32.1 F)
n/a
n/a
Feb
16.1 C (61.0 F)
-36.7 C (-34.1 F)
n/a
n/a
Mar
27.2 C (81.0 F)
-32.2 C (-26.0 F)
n/a
n/a
Apr
31.1 C (88.0 F)
-23.9 C (-11.0 F)
n/a
n/a
May
37.2 C (99.0 F)
-12.2 C (10.0 F)
n/a
n/a
Jun
37.2 C (99.0 F)
-2.8 C (27.0 F)
n/a
n/a
Jul
38.9 C (102.0 F)
-0.6 C (30.9 F)
n/a
n/a
Aug
36.7 C (98.1 F)
-0.6 C (30.9 F)
n/a
n/a
Sep
36.1 C (97.0 F)
-6.1 C (21.0 F)
n/a
n/a
Oct
36.7 C (98.1 F)
-15.0 C (5.0 F)
n/a
n/a
Nov
22.8 C (73.0 F)
-24.4 C (-11.9 F)
n/a
n/a
Dec
14.4 C (57.9 F)
-31.1 C (-24.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Ishpeming still stand. 1906 holds the most, with 35.
Standing records at Ishpeming by the year they were set
Year set
Standing records
1898
11
1899
20
1900
18
1901
19
1902
13
1903
17
1904
16
1905
15
1906
35
1907
16
1908
15
1909
12
1910
21
1911
17
1912
25
1913
26
1914
23
1915
23
1916
15
1917
22
1918
21
1919
18
1920
19
1921
28
1922
16
1923
21
1924
20
1925
26
1926
19
1927
10
1928
17
1929
14
1930
20
1931
27
1932
9
1933
23
1934
20
1935
12
1936
35
1937
9
1938
9
1939
23
1940
15
1941
9
1942
17
1943
13
1944
19
1945
22
1946
16
1947
20
1948
12
1949
11
1950
22
1951
14
1952
12
1953
21
1954
14
1955
11
1956
13
1957
6
1958
8
1959
14
1960
9
1961
8
1962
10
1963
21
1964
23
1965
12
1966
7
1967
10
1968
19
1969
9
1970
9
1971
6
1972
17
1973
16
1974
6
1975
15
1976
29
1977
21
1978
6
1979
11
1980
9
1981
17
1982
19
1983
24
1984
15
1985
7
1986
13
1987
12
All-Time Record Progression
6 new records
6 all-time records were set at Ishpeming between 7 July 1936 and 19 March 1986. Each dot is a new record.
When Ishpeming set new all-time records
Date
Kind
Detail
1936-07-07
Record high maximum temperature
Record high maximum temperature 38.3 C (100.9 F)
1936-07-13
Record high maximum temperature
Record high maximum temperature 38.9 C (102.0 F)
1939-06-11
Record daily precipitation
Record daily precipitation 94.0 mm (3.7 in)
1949-07-29
Record daily precipitation
Record daily precipitation 135.9 mm (5.4 in)
1979-02-17
Record low minimum temperature
Record low minimum temperature -36.7 C (-34.1 F)
1986-03-19
Record snow depth
Record snow depth 147.3 cm (58.0 in)
Wettest Day of Each Month
Jul: 135.9 mm (5.4 in)
The wettest day on record for each calendar month at Ishpeming. The most was 135.9 mm (5.4 in) on 29 July 1949.
Record daily precipitation for each month at Ishpeming
Month
Record daily precipitation (mm)
Date
Jan
57.7 mm (2.3 in)
25 January 1938
Feb
45.7 mm (1.8 in)
26 February 1908
Mar
55.6 mm (2.2 in)
15 March 1939
Apr
73.2 mm (2.9 in)
19 April 1985
May
66.0 mm (2.6 in)
20 May 1975
Jun
94.0 mm (3.7 in)
11 June 1939
Jul
135.9 mm (5.4 in)
29 July 1949
Aug
95.3 mm (3.8 in)
28 August 1960
Sep
104.4 mm (4.1 in)
11 September 1978
Oct
73.7 mm (2.9 in)
5 October 1985
Nov
49.3 mm (1.9 in)
2 November 1985
Dec
33.0 mm (1.3 in)
16 December 1940
Period of Record Coverage
1898 to 1987
Complete yearUnder 90 percent of days
90 years of record at Ishpeming, 1898 to 1987. 12 years have data for under 90 percent of days and are left out of rankings: 1898, 1899, 1905, 1906, 1907, 1908, 1909, 1910 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 79 complete years at Ishpeming, 1900 to 1986. Blue stripes are years cooler than the station's own mean of 4.7 C (40.5 F); red stripes are warmer. The coolest year was 1917, at 2.0 C (35.5 F), and the warmest was 1931, at 7.0 C (44.5 F). The strongest colour marks a difference of 2.8 C (5.0 F).
Annual mean temperature at Ishpeming as warming stripes, 1900 to 1986
Year
Annual mean temperature
Difference from the station mean
1900
4.7 C
-0.08 C
1901
4.4 C
-0.37 C
1902
4.5 C
-0.23 C
1903
3.8 C
-1.00 C
1910
5.1 C
+0.35 C
1911
5.1 C
+0.34 C
1912
3.1 C
-1.61 C
1913
4.6 C
-0.20 C
1914
4.5 C
-0.29 C
1915
4.3 C
-0.50 C
1917
2.0 C
-2.78 C
1918
4.0 C
-0.73 C
1919
5.1 C
+0.37 C
1920
4.6 C
-0.15 C
1921
6.3 C
+1.57 C
1922
5.2 C
+0.41 C
1923
4.5 C
-0.24 C
1924
3.2 C
-1.58 C
1925
4.1 C
-0.64 C
1926
2.9 C
-1.87 C
1927
3.9 C
-0.82 C
1929
3.3 C
-1.48 C
1930
4.9 C
+0.10 C
1931
7.0 C
+2.22 C
1932
4.6 C
-0.16 C
1933
4.6 C
-0.17 C
1934
4.2 C
-0.57 C
1935
4.2 C
-0.52 C
1936
3.7 C
-1.02 C
1937
4.3 C
-0.47 C
1938
5.4 C
+0.64 C
1939
5.0 C
+0.22 C
1940
4.4 C
-0.33 C
1941
6.1 C
+1.37 C
1942
5.2 C
+0.46 C
1943
4.4 C
-0.33 C
1944
5.7 C
+0.94 C
1945
4.1 C
-0.63 C
1946
5.3 C
+0.59 C
1947
4.8 C
+0.02 C
1948
4.8 C
+0.07 C
1949
5.6 C
+0.80 C
1950
3.4 C
-1.39 C
1951
4.0 C
-0.77 C
1952
5.6 C
+0.81 C
1953
6.1 C
+1.39 C
1954
5.1 C
+0.36 C
1955
5.9 C
+1.18 C
1956
5.0 C
+0.20 C
1957
4.8 C
+0.04 C
1958
4.7 C
-0.10 C
1959
4.7 C
-0.02 C
1960
4.8 C
+0.00 C
1961
5.4 C
+0.67 C
1962
4.5 C
-0.23 C
1963
5.0 C
+0.22 C
1964
5.6 C
+0.87 C
1965
4.3 C
-0.43 C
1966
4.8 C
+0.08 C
1967
4.4 C
-0.34 C
1968
5.5 C
+0.75 C
1969
5.2 C
+0.45 C
1970
5.1 C
+0.33 C
1971
5.0 C
+0.25 C
1972
3.6 C
-1.11 C
1973
6.0 C
+1.29 C
1974
4.7 C
-0.02 C
1975
5.7 C
+0.97 C
1976
4.9 C
+0.12 C
1977
5.6 C
+0.80 C
1978
4.6 C
-0.16 C
1979
4.0 C
-0.75 C
1980
4.8 C
+0.02 C
1981
5.4 C
+0.69 C
1982
4.5 C
-0.28 C
1983
5.7 C
+0.98 C
1984
5.4 C
+0.66 C
1985
4.3 C
-0.44 C
1986
5.6 C
+0.82 C
The annual mean temperature here has risen by 0.11 C (0.04 to 0.18) per decade over 1900 to 1986. In Fahrenheit: 0.2 F (0.1 to 0.3) per decade. The slope is a straight line fitted to 79 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Ishpeming
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.11 C (0.04 to 0.18) per decade
0.2 F (0.1 to 0.3) per decade
1900 to 1986
79
Rise
Mean daily maximum
0.1 C (0.1 to 0.2) per decade
0.3 F (0.1 to 0.4) per decade
1900 to 1986
79
Rise
Mean daily minimum
0.07 C (-0.01 to 0.15) per decade
0.13 F (-0.01 to 0.27) per decade
1900 to 1986
79
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
1898 to 1987
Yearly extremes at Ishpeming: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
38.9 C (102.0 F)
1936
33.3 C (91.9 F)
90
Coldest night (TNn)
-36.7 C (-34.1 F)
1979
-29.7 C (-21.5 F)
90
Wettest day (Rx1day)
135.9 mm (5.4 in)
1949
46.3 mm (1.8 in)
90
Wettest five days (Rx5day)
175.6 mm (6.9 in)
1949
73.5 mm (2.9 in)
90
Longest dry spell (CDD)
41 days
1912
18 days
90
Hottest day (TXx)
The hottest day of the year at Ishpeming, 1898 to 1987. The record is 38.9 C (102.0 F) in 1936, marked on the chart; the median year is 33.3 C (91.9 F).
Hottest day (TXx) at Ishpeming by year
Year
Hottest day (TXx)
1898
33.9 C (93.0 F)
1899
30.0 C (86.0 F)
1900
32.8 C (91.0 F)
1901
36.1 C (97.0 F)
1902
29.4 C (84.9 F)
1903
31.1 C (88.0 F)
1904
31.7 C (89.1 F)
1905
30.0 C (86.0 F)
1906
31.1 C (88.0 F)
1907
28.9 C (84.0 F)
1908
33.3 C (91.9 F)
1909
32.8 C (91.0 F)
1910
36.1 C (97.0 F)
1911
37.8 C (100.0 F)
1912
34.4 C (93.9 F)
1913
35.0 C (95.0 F)
1914
33.3 C (91.9 F)
1915
30.6 C (87.1 F)
1916
36.1 C (97.0 F)
1917
37.8 C (100.0 F)
1918
33.9 C (93.0 F)
1919
33.9 C (93.0 F)
1920
29.4 C (84.9 F)
1921
35.6 C (96.1 F)
1922
36.7 C (98.1 F)
1923
32.8 C (91.0 F)
1924
32.2 C (90.0 F)
1925
33.3 C (91.9 F)
1926
31.1 C (88.0 F)
1927
34.4 C (93.9 F)
1928
31.1 C (88.0 F)
1929
33.9 C (93.0 F)
1930
32.8 C (91.0 F)
1931
37.2 C (99.0 F)
1932
33.9 C (93.0 F)
1933
35.6 C (96.1 F)
1934
37.2 C (99.0 F)
1935
31.7 C (89.1 F)
1936
38.9 C (102.0 F)
1937
33.9 C (93.0 F)
1938
32.8 C (91.0 F)
1939
33.9 C (93.0 F)
1940
32.8 C (91.0 F)
1941
35.6 C (96.1 F)
1942
35.0 C (95.0 F)
1943
31.7 C (89.1 F)
1944
32.8 C (91.0 F)
1945
31.7 C (89.1 F)
1946
29.4 C (84.9 F)
1947
36.7 C (98.1 F)
1948
35.6 C (96.1 F)
1949
33.3 C (91.9 F)
1950
30.6 C (87.1 F)
1951
29.4 C (84.9 F)
1952
31.1 C (88.0 F)
1953
33.3 C (91.9 F)
1954
31.7 C (89.1 F)
1955
34.4 C (93.9 F)
1956
36.7 C (98.1 F)
1957
32.8 C (91.0 F)
1958
33.3 C (91.9 F)
1959
31.7 C (89.1 F)
1960
31.7 C (89.1 F)
1961
33.3 C (91.9 F)
1962
31.1 C (88.0 F)
1963
36.1 C (97.0 F)
1964
33.3 C (91.9 F)
1965
34.4 C (93.9 F)
1966
34.4 C (93.9 F)
1967
31.1 C (88.0 F)
1968
32.8 C (91.0 F)
1969
35.0 C (95.0 F)
1970
33.3 C (91.9 F)
1971
33.3 C (91.9 F)
1972
32.2 C (90.0 F)
1973
34.4 C (93.9 F)
1974
33.9 C (93.0 F)
1975
37.2 C (99.0 F)
1976
36.1 C (97.0 F)
1977
37.2 C (99.0 F)
1978
32.2 C (90.0 F)
1979
32.8 C (91.0 F)
1980
34.4 C (93.9 F)
1981
32.8 C (91.0 F)
1982
30.0 C (86.0 F)
1983
34.4 C (93.9 F)
1984
30.0 C (86.0 F)
1985
30.0 C (86.0 F)
1986
35.6 C (96.1 F)
1987
32.2 C (90.0 F)
Coldest night (TNn)
The coldest night of the year at Ishpeming, 1898 to 1987. The record is -36.7 C (-34.1 F) in 1979, marked on the chart; the median year is -29.7 C (-21.5 F).
Coldest night (TNn) at Ishpeming by year
Year
Coldest night (TNn)
1898
-27.8 C (-18.0 F)
1899
-35.6 C (-32.1 F)
1900
-30.6 C (-23.1 F)
1901
-27.8 C (-18.0 F)
1902
-30.6 C (-23.1 F)
1903
-30.6 C (-23.1 F)
1904
-33.9 C (-29.0 F)
1905
-31.1 C (-24.0 F)
1906
-31.7 C (-25.1 F)
1907
-23.9 C (-11.0 F)
1908
-21.1 C (-6.0 F)
1909
-29.4 C (-20.9 F)
1910
-28.3 C (-18.9 F)
1911
-30.0 C (-22.0 F)
1912
-33.9 C (-29.0 F)
1913
-32.2 C (-26.0 F)
1914
-30.0 C (-22.0 F)
1915
-35.6 C (-32.1 F)
1916
-28.9 C (-20.0 F)
1917
-32.2 C (-26.0 F)
1918
-32.8 C (-27.0 F)
1919
-26.1 C (-15.0 F)
1920
-31.7 C (-25.1 F)
1921
-26.1 C (-15.0 F)
1922
-29.4 C (-20.9 F)
1923
-32.2 C (-26.0 F)
1924
-30.0 C (-22.0 F)
1925
-27.8 C (-18.0 F)
1926
-30.0 C (-22.0 F)
1927
-31.7 C (-25.1 F)
1928
-32.8 C (-27.0 F)
1929
-30.0 C (-22.0 F)
1930
-32.2 C (-26.0 F)
1931
-22.2 C (-8.0 F)
1932
-28.3 C (-18.9 F)
1933
-33.3 C (-27.9 F)
1934
-35.0 C (-31.0 F)
1935
-28.3 C (-18.9 F)
1936
-33.9 C (-29.0 F)
1937
-26.7 C (-16.1 F)
1938
-33.9 C (-29.0 F)
1939
-30.6 C (-23.1 F)
1940
-27.8 C (-18.0 F)
1941
-23.3 C (-9.9 F)
1942
-28.3 C (-18.9 F)
1943
-30.6 C (-23.1 F)
1944
-23.9 C (-11.0 F)
1945
-30.6 C (-23.1 F)
1946
-25.0 C (-13.0 F)
1947
-31.1 C (-24.0 F)
1948
-32.8 C (-27.0 F)
1949
-26.1 C (-15.0 F)
1950
-29.4 C (-20.9 F)
1951
-33.3 C (-27.9 F)
1952
-28.9 C (-20.0 F)
1953
-25.6 C (-14.1 F)
1954
-27.8 C (-18.0 F)
1955
-24.4 C (-11.9 F)
1956
-26.7 C (-16.1 F)
1957
-28.3 C (-18.9 F)
1958
-26.1 C (-15.0 F)
1959
-28.3 C (-18.9 F)
1960
-25.6 C (-14.1 F)
1961
-28.3 C (-18.9 F)
1962
-31.7 C (-25.1 F)
1963
-33.3 C (-27.9 F)
1964
-25.6 C (-14.1 F)
1965
-31.1 C (-24.0 F)
1966
-28.3 C (-18.9 F)
1967
-31.7 C (-25.1 F)
1968
-30.0 C (-22.0 F)
1969
-27.8 C (-18.0 F)
1970
-28.9 C (-20.0 F)
1971
-29.4 C (-20.9 F)
1972
-31.7 C (-25.1 F)
1973
-26.7 C (-16.1 F)
1974
-28.9 C (-20.0 F)
1975
-27.2 C (-17.0 F)
1976
-30.6 C (-23.1 F)
1977
-34.4 C (-29.9 F)
1978
-28.3 C (-18.9 F)
1979
-36.7 C (-34.1 F)
1980
-28.9 C (-20.0 F)
1981
-28.9 C (-20.0 F)
1982
-32.2 C (-26.0 F)
1983
-31.1 C (-24.0 F)
1984
-30.6 C (-23.1 F)
1985
-32.2 C (-26.0 F)
1986
-24.4 C (-11.9 F)
1987
-26.1 C (-15.0 F)
Wettest day (Rx1day)
The wettest day of the year at Ishpeming, 1898 to 1987. The record is 135.9 mm (5.4 in) in 1949, marked on the chart; the median year is 46.3 mm (1.8 in).
Wettest day (Rx1day) at Ishpeming by year
Year
Wettest day (Rx1day)
1898
19.1 mm (0.8 in)
1899
69.9 mm (2.8 in)
1900
68.6 mm (2.7 in)
1901
32.5 mm (1.3 in)
1902
38.1 mm (1.5 in)
1903
65.3 mm (2.6 in)
1904
50.8 mm (2.0 in)
1905
43.9 mm (1.7 in)
1906
48.3 mm (1.9 in)
1907
33.0 mm (1.3 in)
1908
45.7 mm (1.8 in)
1909
45.7 mm (1.8 in)
1910
20.3 mm (0.8 in)
1911
45.7 mm (1.8 in)
1912
38.1 mm (1.5 in)
1913
45.7 mm (1.8 in)
1914
48.8 mm (1.9 in)
1915
80.0 mm (3.1 in)
1916
69.3 mm (2.7 in)
1917
27.7 mm (1.1 in)
1918
46.7 mm (1.8 in)
1919
77.0 mm (3.0 in)
1920
35.6 mm (1.4 in)
1921
82.8 mm (3.3 in)
1922
63.5 mm (2.5 in)
1923
36.3 mm (1.4 in)
1924
29.7 mm (1.2 in)
1925
34.5 mm (1.4 in)
1926
53.3 mm (2.1 in)
1927
49.5 mm (1.9 in)
1928
37.6 mm (1.5 in)
1929
68.6 mm (2.7 in)
1930
41.9 mm (1.6 in)
1931
44.5 mm (1.8 in)
1932
43.9 mm (1.7 in)
1933
65.8 mm (2.6 in)
1934
38.1 mm (1.5 in)
1935
41.4 mm (1.6 in)
1936
35.6 mm (1.4 in)
1937
54.4 mm (2.1 in)
1938
57.7 mm (2.3 in)
1939
94.0 mm (3.7 in)
1940
33.3 mm (1.3 in)
1941
32.5 mm (1.3 in)
1942
67.3 mm (2.6 in)
1943
56.9 mm (2.2 in)
1944
59.4 mm (2.3 in)
1945
32.0 mm (1.3 in)
1946
46.5 mm (1.8 in)
1947
55.9 mm (2.2 in)
1948
23.9 mm (0.9 in)
1949
135.9 mm (5.4 in)
1950
30.5 mm (1.2 in)
1951
70.4 mm (2.8 in)
1952
39.9 mm (1.6 in)
1953
50.3 mm (2.0 in)
1954
37.8 mm (1.5 in)
1955
39.9 mm (1.6 in)
1956
27.4 mm (1.1 in)
1957
55.4 mm (2.2 in)
1958
77.2 mm (3.0 in)
1959
67.8 mm (2.7 in)
1960
95.3 mm (3.8 in)
1961
36.1 mm (1.4 in)
1962
27.9 mm (1.1 in)
1963
27.2 mm (1.1 in)
1964
43.2 mm (1.7 in)
1965
41.4 mm (1.6 in)
1966
38.1 mm (1.5 in)
1967
44.5 mm (1.8 in)
1968
44.5 mm (1.8 in)
1969
31.2 mm (1.2 in)
1970
46.0 mm (1.8 in)
1971
50.0 mm (2.0 in)
1972
51.1 mm (2.0 in)
1973
51.1 mm (2.0 in)
1974
42.7 mm (1.7 in)
1975
66.0 mm (2.6 in)
1976
38.6 mm (1.5 in)
1977
58.7 mm (2.3 in)
1978
104.4 mm (4.1 in)
1979
66.5 mm (2.6 in)
1980
60.5 mm (2.4 in)
1981
47.5 mm (1.9 in)
1982
81.3 mm (3.2 in)
1983
63.5 mm (2.5 in)
1984
50.8 mm (2.0 in)
1985
73.7 mm (2.9 in)
1986
56.1 mm (2.2 in)
1987
30.7 mm (1.2 in)
Wettest five days (Rx5day)
The wettest five days of the year at Ishpeming, 1898 to 1987. The record is 175.6 mm (6.9 in) in 1949, marked on the chart; the median year is 73.5 mm (2.9 in).
Wettest five days (Rx5day) at Ishpeming by year
Year
Wettest five days (Rx5day)
1898
33.5 mm (1.3 in)
1899
114.8 mm (4.5 in)
1900
83.7 mm (3.3 in)
1901
73.7 mm (2.9 in)
1902
68.8 mm (2.7 in)
1903
90.2 mm (3.6 in)
1904
66.8 mm (2.6 in)
1905
53.3 mm (2.1 in)
1906
75.0 mm (3.0 in)
1907
63.5 mm (2.5 in)
1908
66.0 mm (2.6 in)
1909
58.4 mm (2.3 in)
1910
45.7 mm (1.8 in)
1911
82.6 mm (3.3 in)
1912
91.4 mm (3.6 in)
1913
81.7 mm (3.2 in)
1914
88.7 mm (3.5 in)
1915
135.9 mm (5.4 in)
1916
108.2 mm (4.3 in)
1917
41.2 mm (1.6 in)
1918
63.2 mm (2.5 in)
1919
77.5 mm (3.1 in)
1920
59.5 mm (2.3 in)
1921
96.0 mm (3.8 in)
1922
98.5 mm (3.9 in)
1923
47.0 mm (1.9 in)
1924
50.4 mm (2.0 in)
1925
59.4 mm (2.3 in)
1926
101.3 mm (4.0 in)
1927
73.7 mm (2.9 in)
1928
77.2 mm (3.0 in)
1929
82.0 mm (3.2 in)
1930
61.5 mm (2.4 in)
1931
96.9 mm (3.8 in)
1932
85.9 mm (3.4 in)
1933
70.4 mm (2.8 in)
1934
53.1 mm (2.1 in)
1935
51.3 mm (2.0 in)
1936
65.5 mm (2.6 in)
1937
83.1 mm (3.3 in)
1938
78.0 mm (3.1 in)
1939
121.4 mm (4.8 in)
1940
51.9 mm (2.0 in)
1941
81.0 mm (3.2 in)
1942
74.6 mm (2.9 in)
1943
131.6 mm (5.2 in)
1944
71.1 mm (2.8 in)
1945
51.0 mm (2.0 in)
1946
62.7 mm (2.5 in)
1947
67.8 mm (2.7 in)
1948
46.5 mm (1.8 in)
1949
175.6 mm (6.9 in)
1950
74.7 mm (2.9 in)
1951
126.6 mm (5.0 in)
1952
64.8 mm (2.6 in)
1953
84.0 mm (3.3 in)
1954
63.0 mm (2.5 in)
1955
60.2 mm (2.4 in)
1956
58.2 mm (2.3 in)
1957
88.9 mm (3.5 in)
1958
102.9 mm (4.1 in)
1959
97.5 mm (3.8 in)
1960
105.9 mm (4.2 in)
1961
55.7 mm (2.2 in)
1962
37.0 mm (1.5 in)
1963
55.7 mm (2.2 in)
1964
87.9 mm (3.5 in)
1965
59.9 mm (2.4 in)
1966
69.8 mm (2.7 in)
1967
57.9 mm (2.3 in)
1968
100.2 mm (3.9 in)
1969
45.7 mm (1.8 in)
1970
81.0 mm (3.2 in)
1971
62.2 mm (2.4 in)
1972
62.2 mm (2.4 in)
1973
84.4 mm (3.3 in)
1974
73.2 mm (2.9 in)
1975
67.3 mm (2.6 in)
1976
42.4 mm (1.7 in)
1977
83.3 mm (3.3 in)
1978
111.8 mm (4.4 in)
1979
107.2 mm (4.2 in)
1980
66.8 mm (2.6 in)
1981
67.9 mm (2.7 in)
1982
90.2 mm (3.6 in)
1983
95.3 mm (3.8 in)
1984
65.8 mm (2.6 in)
1985
99.9 mm (3.9 in)
1986
74.9 mm (2.9 in)
1987
54.8 mm (2.2 in)
Longest dry spell (CDD)
The longest dry spell of the year at Ishpeming, 1898 to 1987. The record is 41 days in 1912, marked on the chart; the median year is 18 days.
Longest dry spell (CDD) at Ishpeming by year
Year
Longest dry spell (CDD)
1898
13 days
1899
25 days
1900
31 days
1901
26 days
1902
20 days
1903
24 days
1904
26 days
1905
14 days
1906
15 days
1907
26 days
1908
18 days
1909
18 days
1910
31 days
1911
14 days
1912
41 days
1913
24 days
1914
20 days
1915
16 days
1916
15 days
1917
20 days
1918
28 days
1919
14 days
1920
19 days
1921
14 days
1922
13 days
1923
17 days
1924
22 days
1925
27 days
1926
22 days
1927
17 days
1928
12 days
1929
13 days
1930
16 days
1931
19 days
1932
20 days
1933
16 days
1934
17 days
1935
14 days
1936
19 days
1937
18 days
1938
16 days
1939
16 days
1940
15 days
1941
26 days
1942
18 days
1943
18 days
1944
18 days
1945
14 days
1946
14 days
1947
17 days
1948
35 days
1949
11 days
1950
15 days
1951
21 days
1952
15 days
1953
16 days
1954
13 days
1955
11 days
1956
16 days
1957
21 days
1958
17 days
1959
23 days
1960
17 days
1961
19 days
1962
14 days
1963
24 days
1964
15 days
1965
21 days
1966
15 days
1967
26 days
1968
14 days
1969
22 days
1970
19 days
1971
30 days
1972
13 days
1973
16 days
1974
12 days
1975
20 days
1976
29 days
1977
14 days
1978
17 days
1979
17 days
1980
22 days
1981
18 days
1982
21 days
1983
31 days
1984
21 days
1985
19 days
1986
38 days
1987
22 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
79 years with a frost
Across 79 years with a frost, the median last spring frost at Ishpeming falls on 30 May and the median first autumn frost on 18 September, which leaves a median of 112 days between them.
In 1957 to 1986 the median growing season was 112 days. That is 1 day more than in 1900 to 1937.
Fitted over all years, the growing season changes by +0.9 days per decade at this station.
Frost dates and growing season at Ishpeming
Measure
Median, all years
Earliest period (1900 to 1937)
Recent period (1957 to 1986)
Recent against earliest
Fitted trend
Last spring frost
30 May
29 May
1 June
3 days later
0.0 days per decade
First autumn frost
18 September
15 September
18 September
3 days later
+0.9 days per decade
Growing days
112 days
111 days
112 days
1 day more
+0.9 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
84 years, 1899 to 1986
A day with at least 47.7 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 118.2 mm (4.7 in) of rain is expected about once in 100 years.
Rainfall return levels at Ishpeming: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
47.7 mm (1.9 in)
5 years
64.8 mm (2.6 in)
10 years
76.8 mm (3.0 in)
25 years
92.7 mm (3.6 in)
50 years
105.2 mm (4.1 in)
100 years
118.2 mm (4.7 in)
Longer than the 84 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, 84 years of values from 1899 to 1986.
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: 135.9 mm (5.4 in) in 1949; 104.4 mm (4.1 in) in 1978; 95.3 mm (3.8 in) in 1960.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Ishpeming standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Ishpeming 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.