Record envelope, standing records and threshold days for Mackinaw City 2 (USC00205000), Michigan, United States, with 77 years of record.
Key Facts for Mackinaw City 2
Mackinaw City 2 (USC00205000) is a weather station in Michigan, United States at 45.78 latitude and -84.73 longitude, 180 m (591 ft) above sea level.
The station reports from 1896 to 1972, 77 years of record.
1,464 records set at Mackinaw City 2 still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Mackinaw City 2 set a daily record precipitation of 30.5 mm (1.2 in) on 31 December 1972.
About the Station
Location: Michigan, United States, 45.78 latitude, -84.73 longitude.
Elevation: 180 m (591 ft).
Period of record: 1896 to 1972, 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 Mackinaw City 2. 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 Mackinaw City 2, 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)
-34.4 C (-29.9 F)
n/a
n/a
Feb
13.9 C (57.0 F)
-35.0 C (-31.0 F)
n/a
n/a
Mar
25.0 C (77.0 F)
-31.7 C (-25.1 F)
n/a
n/a
Apr
28.3 C (82.9 F)
-20.6 C (-5.1 F)
n/a
n/a
May
37.2 C (99.0 F)
-5.6 C (21.9 F)
n/a
n/a
Jun
35.0 C (95.0 F)
-1.1 C (30.0 F)
n/a
n/a
Jul
40.0 C (104.0 F)
2.2 C (36.0 F)
n/a
n/a
Aug
37.2 C (99.0 F)
-1.1 C (30.0 F)
n/a
n/a
Sep
35.6 C (96.1 F)
-3.3 C (26.1 F)
n/a
n/a
Oct
31.1 C (88.0 F)
-7.2 C (19.0 F)
n/a
n/a
Nov
24.4 C (75.9 F)
-17.2 C (1.0 F)
n/a
n/a
Dec
16.1 C (61.0 F)
-24.4 C (-11.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Mackinaw City 2 still stand. 1897 holds the most, with 41.
Standing records at Mackinaw City 2 by the year they were set
Year set
Standing records
1896
29
1897
41
1898
28
1899
38
1900
19
1901
41
1902
11
1903
18
1904
27
1905
7
1906
14
1907
20
1908
25
1909
22
1910
22
1911
20
1912
36
1913
19
1914
19
1915
15
1916
38
1917
19
1918
31
1919
28
1920
39
1921
21
1922
8
1923
35
1924
23
1925
24
1926
24
1927
12
1928
22
1929
25
1930
20
1931
21
1932
28
1933
9
1934
24
1935
7
1936
24
1937
15
1938
16
1939
13
1940
14
1941
15
1942
10
1943
11
1944
10
1945
25
1946
27
1947
38
1948
8
1949
11
1950
22
1951
18
1952
13
1953
13
1954
7
1955
20
1956
17
1957
10
1958
22
1959
18
1960
9
1961
13
1962
17
1963
18
1964
19
1965
14
1966
13
1967
6
1968
11
1969
5
1970
7
1971
4
1972
2
All-Time Record Progression
2 new records
2 all-time records were set at Mackinaw City 2 between 26 January 1927 and 8 February 1934. Each dot is a new record.
When Mackinaw City 2 set new all-time records
Date
Kind
Detail
1927-01-26
Record low minimum temperature
Record low minimum temperature -34.4 C (-29.9 F)
1934-02-08
Record low minimum temperature
Record low minimum temperature -35.0 C (-31.0 F)
Wettest Day of Each Month
Jul: 83.3 mm (3.3 in)
The wettest day on record for each calendar month at Mackinaw City 2. The most was 83.3 mm (3.3 in) on 5 July 1901.
Record daily precipitation for each month at Mackinaw City 2
Month
Record daily precipitation (mm)
Date
Jan
27.7 mm (1.1 in)
24 January 1938
Feb
62.0 mm (2.4 in)
4 February 1903
Mar
57.2 mm (2.3 in)
20 March 1921
Apr
58.9 mm (2.3 in)
26 April 1902
May
50.8 mm (2.0 in)
1 May 1898
Jun
76.2 mm (3.0 in)
8 June 1896
Jul
83.3 mm (3.3 in)
5 July 1901
Aug
72.1 mm (2.8 in)
20 August 1947
Sep
70.6 mm (2.8 in)
21 September 1970
Oct
50.8 mm (2.0 in)
6 October 1949
Nov
46.2 mm (1.8 in)
12 November 1902
Dec
37.3 mm (1.5 in)
15 December 1971
Period of Record Coverage
1896 to 1972
Complete yearUnder 90 percent of days
77 years of record at Mackinaw City 2, 1896 to 1972. 10 years have data for under 90 percent of days and are left out of rankings: 1896, 1904, 1905, 1906, 1913, 1914, 1917, 1920 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 57 complete years at Mackinaw City 2, 1897 to 1971. Blue stripes are years cooler than the station's own mean of 6.0 C (42.7 F); red stripes are warmer. The coolest year was 1926, at 3.7 C (38.6 F), and the warmest was 1921, at 7.6 C (45.8 F). The strongest colour marks a difference of 2.4 C (4.3 F).
Annual mean temperature at Mackinaw City 2 as warming stripes, 1897 to 1971
Year
Annual mean temperature
Difference from the station mean
1897
5.1 C
-0.92 C
1898
5.9 C
-0.09 C
1899
4.9 C
-1.07 C
1900
6.4 C
+0.46 C
1901
7.2 C
+1.18 C
1902
6.7 C
+0.68 C
1909
5.9 C
-0.04 C
1910
6.0 C
+0.07 C
1911
6.5 C
+0.48 C
1915
6.0 C
-0.01 C
1919
7.4 C
+1.45 C
1921
7.6 C
+1.67 C
1922
5.9 C
-0.10 C
1923
4.4 C
-1.58 C
1924
4.3 C
-1.64 C
1925
5.2 C
-0.78 C
1926
3.7 C
-2.31 C
1927
5.2 C
-0.81 C
1928
5.1 C
-0.89 C
1929
4.4 C
-1.59 C
1930
5.5 C
-0.52 C
1931
7.3 C
+1.37 C
1932
6.4 C
+0.41 C
1934
5.2 C
-0.82 C
1935
5.6 C
-0.40 C
1936
5.0 C
-1.01 C
1937
6.1 C
+0.08 C
1938
6.7 C
+0.69 C
1939
5.9 C
-0.06 C
1940
5.5 C
-0.51 C
1941
6.9 C
+0.91 C
1943
5.4 C
-0.61 C
1944
6.6 C
+0.61 C
1945
5.9 C
-0.09 C
1946
6.9 C
+0.93 C
1948
6.5 C
+0.51 C
1949
7.2 C
+1.21 C
1950
4.9 C
-1.07 C
1951
5.7 C
-0.27 C
1952
6.5 C
+0.57 C
1953
7.2 C
+1.20 C
1954
6.5 C
+0.49 C
1955
7.3 C
+1.30 C
1956
5.5 C
-0.43 C
1957
5.9 C
-0.09 C
1958
5.7 C
-0.31 C
1959
5.7 C
-0.24 C
1960
6.3 C
+0.33 C
1961
6.7 C
+0.73 C
1962
5.8 C
-0.21 C
1965
5.6 C
-0.39 C
1966
6.1 C
+0.15 C
1967
5.7 C
-0.29 C
1968
6.3 C
+0.32 C
1969
6.6 C
+0.62 C
1970
6.3 C
+0.36 C
1971
6.2 C
+0.27 C
The fitted trend in annual mean temperature here over 1897 to 1971 is 0.1 C (0.0 to 0.2) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.1 to 0.3) per decade. The slope is a straight line fitted to 57 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Mackinaw City 2
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.1 C (0.0 to 0.2) per decade
0.1 F (-0.1 to 0.3) per decade
1897 to 1971
57
Not clearly different from zero
Mean daily maximum
0.05 C (-0.07 to 0.17) per decade
0.1 F (-0.1 to 0.3) per decade
1897 to 1971
57
Not clearly different from zero
Mean daily minimum
0.1 C (-0.1 to 0.2) per decade
0.1 F (-0.1 to 0.3) per decade
1897 to 1971
57
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
1896 to 1972
Yearly extremes at Mackinaw City 2: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
40.0 C (104.0 F)
1916
33.3 C (91.9 F)
77
Coldest night (TNn)
-35.0 C (-31.0 F)
1934
-25.6 C (-14.1 F)
77
Wettest day (Rx1day)
83.3 mm (3.3 in)
1901
40.6 mm (1.6 in)
77
Wettest five days (Rx5day)
118.4 mm (4.7 in)
1939
68.6 mm (2.7 in)
77
Longest dry spell (CDD)
46 days
1969
19 days
77
Hottest day (TXx)
The hottest day of the year at Mackinaw City 2, 1896 to 1972. The record is 40.0 C (104.0 F) in 1916, marked on the chart; the median year is 33.3 C (91.9 F).
Hottest day (TXx) at Mackinaw City 2 by year
Year
Hottest day (TXx)
1896
30.6 C (87.1 F)
1897
36.1 C (97.0 F)
1898
33.3 C (91.9 F)
1899
33.9 C (93.0 F)
1900
33.9 C (93.0 F)
1901
35.6 C (96.1 F)
1902
34.4 C (93.9 F)
1903
31.7 C (89.1 F)
1904
32.2 C (90.0 F)
1905
31.1 C (88.0 F)
1906
30.0 C (86.0 F)
1907
31.7 C (89.1 F)
1908
33.3 C (91.9 F)
1909
33.9 C (93.0 F)
1910
34.4 C (93.9 F)
1911
36.7 C (98.1 F)
1912
30.6 C (87.1 F)
1913
30.6 C (87.1 F)
1914
35.0 C (95.0 F)
1915
30.6 C (87.1 F)
1916
40.0 C (104.0 F)
1917
35.6 C (96.1 F)
1918
36.1 C (97.0 F)
1919
37.2 C (99.0 F)
1920
29.4 C (84.9 F)
1921
34.4 C (93.9 F)
1922
33.3 C (91.9 F)
1923
31.7 C (89.1 F)
1924
31.1 C (88.0 F)
1925
33.3 C (91.9 F)
1926
30.6 C (87.1 F)
1927
28.3 C (82.9 F)
1928
30.0 C (86.0 F)
1929
32.8 C (91.0 F)
1930
33.3 C (91.9 F)
1931
35.0 C (95.0 F)
1932
32.8 C (91.0 F)
1933
33.3 C (91.9 F)
1934
31.7 C (89.1 F)
1935
33.9 C (93.0 F)
1936
37.2 C (99.0 F)
1937
33.9 C (93.0 F)
1938
35.0 C (95.0 F)
1939
33.9 C (93.0 F)
1940
31.1 C (88.0 F)
1941
33.3 C (91.9 F)
1942
34.4 C (93.9 F)
1943
31.7 C (89.1 F)
1944
35.0 C (95.0 F)
1945
33.9 C (93.0 F)
1946
30.6 C (87.1 F)
1947
37.2 C (99.0 F)
1948
32.8 C (91.0 F)
1949
35.0 C (95.0 F)
1950
30.6 C (87.1 F)
1951
31.1 C (88.0 F)
1952
33.3 C (91.9 F)
1953
35.6 C (96.1 F)
1954
30.0 C (86.0 F)
1955
37.2 C (99.0 F)
1956
33.9 C (93.0 F)
1957
33.3 C (91.9 F)
1958
31.7 C (89.1 F)
1959
32.2 C (90.0 F)
1960
33.3 C (91.9 F)
1961
31.1 C (88.0 F)
1962
32.8 C (91.0 F)
1963
35.0 C (95.0 F)
1964
33.3 C (91.9 F)
1965
32.2 C (90.0 F)
1966
32.8 C (91.0 F)
1967
32.2 C (90.0 F)
1968
30.6 C (87.1 F)
1969
31.1 C (88.0 F)
1970
31.1 C (88.0 F)
1971
34.4 C (93.9 F)
1972
23.3 C (73.9 F)
Coldest night (TNn)
The coldest night of the year at Mackinaw City 2, 1896 to 1972. The record is -35.0 C (-31.0 F) in 1934, marked on the chart; the median year is -25.6 C (-14.1 F).
Coldest night (TNn) at Mackinaw City 2 by year
Year
Coldest night (TNn)
1896
-15.0 C (5.0 F)
1897
-25.6 C (-14.1 F)
1898
-25.6 C (-14.1 F)
1899
-31.7 C (-25.1 F)
1900
-28.9 C (-20.0 F)
1901
-26.1 C (-15.0 F)
1902
-22.2 C (-8.0 F)
1903
-24.4 C (-11.9 F)
1904
-31.7 C (-25.1 F)
1905
-29.4 C (-20.9 F)
1906
-27.2 C (-17.0 F)
1907
-27.2 C (-17.0 F)
1908
-25.6 C (-14.1 F)
1909
-22.2 C (-8.0 F)
1910
-25.6 C (-14.1 F)
1911
-22.8 C (-9.0 F)
1912
-32.8 C (-27.0 F)
1913
-22.2 C (-8.0 F)
1914
-28.3 C (-18.9 F)
1915
-26.1 C (-15.0 F)
1916
-25.6 C (-14.1 F)
1917
-29.4 C (-20.9 F)
1918
-31.7 C (-25.1 F)
1919
-21.1 C (-6.0 F)
1920
-33.3 C (-27.9 F)
1921
-16.1 C (3.0 F)
1922
-28.9 C (-20.0 F)
1923
-24.4 C (-11.9 F)
1924
-28.3 C (-18.9 F)
1925
-24.4 C (-11.9 F)
1926
-27.8 C (-18.0 F)
1927
-34.4 C (-29.9 F)
1928
-32.2 C (-26.0 F)
1929
-26.1 C (-15.0 F)
1930
-28.3 C (-18.9 F)
1931
-21.1 C (-6.0 F)
1932
-18.3 C (-0.9 F)
1933
-25.0 C (-13.0 F)
1934
-35.0 C (-31.0 F)
1935
-26.7 C (-16.1 F)
1936
-28.9 C (-20.0 F)
1937
-19.4 C (-2.9 F)
1938
-27.2 C (-17.0 F)
1939
-25.6 C (-14.1 F)
1940
-21.1 C (-6.0 F)
1941
-22.2 C (-8.0 F)
1942
-21.1 C (-6.0 F)
1943
-28.9 C (-20.0 F)
1944
-19.4 C (-2.9 F)
1945
-24.4 C (-11.9 F)
1946
-22.2 C (-8.0 F)
1947
-23.3 C (-9.9 F)
1948
-31.1 C (-24.0 F)
1949
-21.1 C (-6.0 F)
1950
-27.2 C (-17.0 F)
1951
-28.3 C (-18.9 F)
1952
-21.7 C (-7.1 F)
1953
-20.0 C (-4.0 F)
1954
-21.1 C (-6.0 F)
1955
-25.6 C (-14.1 F)
1956
-19.4 C (-2.9 F)
1957
-24.4 C (-11.9 F)
1958
-28.3 C (-18.9 F)
1959
-31.1 C (-24.0 F)
1960
-22.2 C (-8.0 F)
1961
-23.9 C (-11.0 F)
1962
-30.0 C (-22.0 F)
1963
-28.3 C (-18.9 F)
1964
-26.1 C (-15.0 F)
1965
-27.8 C (-18.0 F)
1966
-23.3 C (-9.9 F)
1967
-27.8 C (-18.0 F)
1968
-25.6 C (-14.1 F)
1969
-20.6 C (-5.1 F)
1970
-26.7 C (-16.1 F)
1971
-26.7 C (-16.1 F)
1972
-31.7 C (-25.1 F)
Wettest day (Rx1day)
The wettest day of the year at Mackinaw City 2, 1896 to 1972. The record is 83.3 mm (3.3 in) in 1901, marked on the chart; the median year is 40.6 mm (1.6 in).
Wettest day (Rx1day) at Mackinaw City 2 by year
Year
Wettest day (Rx1day)
1896
76.2 mm (3.0 in)
1897
39.9 mm (1.6 in)
1898
58.9 mm (2.3 in)
1899
66.8 mm (2.6 in)
1900
66.0 mm (2.6 in)
1901
83.3 mm (3.3 in)
1902
58.9 mm (2.3 in)
1903
62.0 mm (2.4 in)
1904
58.4 mm (2.3 in)
1905
38.1 mm (1.5 in)
1906
38.1 mm (1.5 in)
1907
50.8 mm (2.0 in)
1908
45.7 mm (1.8 in)
1909
25.4 mm (1.0 in)
1910
44.5 mm (1.8 in)
1911
26.7 mm (1.1 in)
1912
25.4 mm (1.0 in)
1913
30.5 mm (1.2 in)
1914
38.1 mm (1.5 in)
1915
33.0 mm (1.3 in)
1916
22.9 mm (0.9 in)
1917
28.4 mm (1.1 in)
1918
34.5 mm (1.4 in)
1919
52.8 mm (2.1 in)
1920
52.1 mm (2.1 in)
1921
57.2 mm (2.3 in)
1922
46.0 mm (1.8 in)
1923
43.9 mm (1.7 in)
1924
34.5 mm (1.4 in)
1925
38.1 mm (1.5 in)
1926
21.8 mm (0.9 in)
1927
26.2 mm (1.0 in)
1928
39.4 mm (1.6 in)
1929
45.7 mm (1.8 in)
1930
75.4 mm (3.0 in)
1931
41.1 mm (1.6 in)
1932
26.7 mm (1.1 in)
1933
37.1 mm (1.5 in)
1934
32.5 mm (1.3 in)
1935
57.2 mm (2.3 in)
1936
29.5 mm (1.2 in)
1937
31.2 mm (1.2 in)
1938
47.2 mm (1.9 in)
1939
56.4 mm (2.2 in)
1940
27.4 mm (1.1 in)
1941
37.1 mm (1.5 in)
1942
34.5 mm (1.4 in)
1943
35.6 mm (1.4 in)
1944
45.7 mm (1.8 in)
1945
43.9 mm (1.7 in)
1946
44.5 mm (1.8 in)
1947
72.1 mm (2.8 in)
1948
41.4 mm (1.6 in)
1949
50.8 mm (2.0 in)
1950
26.7 mm (1.1 in)
1951
59.9 mm (2.4 in)
1952
40.6 mm (1.6 in)
1953
52.8 mm (2.1 in)
1954
50.8 mm (2.0 in)
1955
24.1 mm (0.9 in)
1956
37.8 mm (1.5 in)
1957
37.3 mm (1.5 in)
1958
54.6 mm (2.1 in)
1959
49.0 mm (1.9 in)
1960
66.0 mm (2.6 in)
1961
52.1 mm (2.1 in)
1962
33.5 mm (1.3 in)
1963
34.0 mm (1.3 in)
1964
52.3 mm (2.1 in)
1965
38.9 mm (1.5 in)
1966
38.4 mm (1.5 in)
1967
31.5 mm (1.2 in)
1968
53.3 mm (2.1 in)
1969
35.3 mm (1.4 in)
1970
70.6 mm (2.8 in)
1971
37.3 mm (1.5 in)
1972
30.5 mm (1.2 in)
Wettest five days (Rx5day)
The wettest five days of the year at Mackinaw City 2, 1896 to 1972. The record is 118.4 mm (4.7 in) in 1939, marked on the chart; the median year is 68.6 mm (2.7 in).
Wettest five days (Rx5day) at Mackinaw City 2 by year
Year
Wettest five days (Rx5day)
1896
98.6 mm (3.9 in)
1897
72.0 mm (2.8 in)
1898
91.1 mm (3.6 in)
1899
75.0 mm (3.0 in)
1900
113.8 mm (4.5 in)
1901
90.4 mm (3.6 in)
1902
106.5 mm (4.2 in)
1903
96.5 mm (3.8 in)
1904
92.7 mm (3.6 in)
1905
83.8 mm (3.3 in)
1906
51.4 mm (2.0 in)
1907
50.8 mm (2.0 in)
1908
55.8 mm (2.2 in)
1909
39.3 mm (1.5 in)
1910
72.9 mm (2.9 in)
1911
60.0 mm (2.4 in)
1912
45.7 mm (1.8 in)
1913
45.0 mm (1.8 in)
1914
68.6 mm (2.7 in)
1915
43.9 mm (1.7 in)
1916
52.6 mm (2.1 in)
1917
109.1 mm (4.3 in)
1918
63.0 mm (2.5 in)
1919
84.9 mm (3.3 in)
1920
58.5 mm (2.3 in)
1921
74.9 mm (2.9 in)
1922
65.8 mm (2.6 in)
1923
90.7 mm (3.6 in)
1924
49.1 mm (1.9 in)
1925
45.4 mm (1.8 in)
1926
41.4 mm (1.6 in)
1927
48.8 mm (1.9 in)
1928
77.0 mm (3.0 in)
1929
56.9 mm (2.2 in)
1930
86.8 mm (3.4 in)
1931
62.3 mm (2.5 in)
1932
52.3 mm (2.1 in)
1933
49.8 mm (2.0 in)
1934
58.8 mm (2.3 in)
1935
103.3 mm (4.1 in)
1936
55.1 mm (2.2 in)
1937
80.7 mm (3.2 in)
1938
55.6 mm (2.2 in)
1939
118.4 mm (4.7 in)
1940
38.9 mm (1.5 in)
1941
31.8 mm (1.3 in)
1942
52.1 mm (2.1 in)
1943
68.1 mm (2.7 in)
1944
83.3 mm (3.3 in)
1945
62.7 mm (2.5 in)
1946
70.4 mm (2.8 in)
1947
77.2 mm (3.0 in)
1948
51.6 mm (2.0 in)
1949
63.8 mm (2.5 in)
1950
47.8 mm (1.9 in)
1951
74.9 mm (2.9 in)
1952
85.8 mm (3.4 in)
1953
79.5 mm (3.1 in)
1954
86.6 mm (3.4 in)
1955
46.2 mm (1.8 in)
1956
60.6 mm (2.4 in)
1957
80.2 mm (3.2 in)
1958
68.1 mm (2.7 in)
1959
76.4 mm (3.0 in)
1960
95.6 mm (3.8 in)
1961
76.0 mm (3.0 in)
1962
46.8 mm (1.8 in)
1963
51.4 mm (2.0 in)
1964
59.7 mm (2.4 in)
1965
93.5 mm (3.7 in)
1966
74.4 mm (2.9 in)
1967
90.4 mm (3.6 in)
1968
86.8 mm (3.4 in)
1969
69.1 mm (2.7 in)
1970
105.9 mm (4.2 in)
1971
70.7 mm (2.8 in)
1972
48.3 mm (1.9 in)
Longest dry spell (CDD)
The longest dry spell of the year at Mackinaw City 2, 1896 to 1972. The record is 46 days in 1969, marked on the chart; the median year is 19 days.
Longest dry spell (CDD) at Mackinaw City 2 by year
Year
Longest dry spell (CDD)
1896
25 days
1897
19 days
1898
22 days
1899
20 days
1900
27 days
1901
22 days
1902
22 days
1903
23 days
1904
36 days
1905
16 days
1906
24 days
1907
21 days
1908
16 days
1909
28 days
1910
29 days
1911
19 days
1912
38 days
1913
17 days
1914
32 days
1915
12 days
1916
23 days
1917
18 days
1918
12 days
1919
21 days
1920
16 days
1921
19 days
1922
23 days
1923
21 days
1924
29 days
1925
22 days
1926
15 days
1927
17 days
1928
12 days
1929
18 days
1930
13 days
1931
22 days
1932
22 days
1933
13 days
1934
19 days
1935
15 days
1936
35 days
1937
20 days
1938
13 days
1939
20 days
1940
19 days
1941
3 days
1942
11 days
1943
12 days
1944
21 days
1945
15 days
1946
15 days
1947
19 days
1948
23 days
1949
23 days
1950
12 days
1951
16 days
1952
14 days
1953
18 days
1954
31 days
1955
14 days
1956
18 days
1957
13 days
1958
17 days
1959
14 days
1960
19 days
1961
19 days
1962
12 days
1963
23 days
1964
14 days
1965
23 days
1966
27 days
1967
21 days
1968
30 days
1969
46 days
1970
19 days
1971
13 days
1972
14 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
57 years with a frost
Across 57 years with a frost, the median last spring frost at Mackinaw City 2 falls on 15 May and the median first autumn frost on 17 October, which leaves a median of 152 days between them.
Fitted over all years, the growing season changes by +2.4 days per decade at this station.
Frost dates and growing season at Mackinaw City 2
Measure
Median, all years
Earliest period
Recent period (1938 to 1971)
Recent against earliest
Fitted trend
Last spring frost
15 May
n/a
16 May
n/a
-1.1 days per decade
First autumn frost
17 October
n/a
18 October
n/a
+1.3 days per decade
Growing days
152 days
n/a
154 days
n/a
+2.4 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
58 years, 1897 to 1971
A day with at least 43.3 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 86.5 mm (3.4 in) of rain is expected about once in 100 years.
Rainfall return levels at Mackinaw City 2: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
43.3 mm (1.7 in)
5 years
56.8 mm (2.2 in)
10 years
64.9 mm (2.6 in)
25 years
74.2 mm (2.9 in)
50 years
80.6 mm (3.2 in)
100 years
86.5 mm (3.4 in)
Longer than the 58 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, 58 years of values from 1897 to 1971.
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: 83.3 mm (3.3 in) in 1901; 75.4 mm (3.0 in) in 1930; 72.1 mm (2.8 in) in 1947.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Mackinaw City 2 standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Mackinaw City 2 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.