Record envelope, standing records and threshold days for Mackinac Island (USC00204997), Michigan, United States, with 39 years of record.
Key Facts for Mackinac Island
Mackinac Island (USC00204997) is a weather station in Michigan, United States at 45.85 latitude and -84.62 longitude, 253 m (830 ft) above sea level.
The station reports from 1900 to 1938, 39 years of record.
1,464 records set at Mackinac Island still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Mackinac Island set a daily record low maximum temperature of -11.1 C (12.0 F) on 31 December 1938.
About the Station
Location: Michigan, United States, 45.85 latitude, -84.62 longitude.
Elevation: 253 m (830 ft).
Period of record: 1900 to 1938, 39 years.
Eligible elements: tmax, tmin, prcp.
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 Mackinac Island. 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 Mackinac Island, 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)
-31.7 C (-25.1 F)
n/a
n/a
Feb
12.8 C (55.0 F)
-32.8 C (-27.0 F)
n/a
n/a
Mar
18.9 C (66.0 F)
-26.7 C (-16.1 F)
n/a
n/a
Apr
25.6 C (78.1 F)
-17.8 C (0.0 F)
n/a
n/a
May
28.9 C (84.0 F)
-6.7 C (19.9 F)
n/a
n/a
Jun
32.2 C (90.0 F)
-2.2 C (28.0 F)
n/a
n/a
Jul
37.2 C (99.0 F)
3.3 C (37.9 F)
n/a
n/a
Aug
35.6 C (96.1 F)
2.2 C (36.0 F)
n/a
n/a
Sep
32.2 C (90.0 F)
-1.7 C (28.9 F)
n/a
n/a
Oct
26.7 C (80.1 F)
-9.4 C (15.1 F)
n/a
n/a
Nov
21.7 C (71.1 F)
-20.6 C (-5.1 F)
n/a
n/a
Dec
12.8 C (55.0 F)
-26.1 C (-15.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Mackinac Island still stand. 1918 holds the most, with 68.
Standing records at Mackinac Island by the year they were set
Year set
Standing records
1900
37
1901
35
1902
45
1903
41
1904
47
1905
38
1906
40
1907
26
1908
17
1909
31
1910
7
1911
44
1912
46
1913
33
1914
37
1915
24
1916
44
1917
40
1918
68
1919
53
1920
41
1921
47
1922
27
1923
43
1924
31
1925
47
1926
33
1927
49
1928
40
1929
31
1930
34
1931
44
1932
43
1933
32
1934
68
1935
16
1936
25
1937
27
1938
33
All-Time Record Progression
1 new records
1 all-time records were set at Mackinac Island between 8 February 1934 and 8 February 1934. Each dot is a new record.
When Mackinac Island set new all-time records
Date
Kind
Detail
1934-02-08
Record low minimum temperature
Record low minimum temperature -32.8 C (-27.0 F)
Wettest Day of Each Month
Jan: 81.3 mm (3.2 in)
The wettest day on record for each calendar month at Mackinac Island. The most was 81.3 mm (3.2 in) on 28 January 1914.
Record daily precipitation for each month at Mackinac Island
Month
Record daily precipitation (mm)
Date
Jan
81.3 mm (3.2 in)
28 January 1914
Feb
35.6 mm (1.4 in)
22 February 1922
Mar
53.3 mm (2.1 in)
25 March 1904
Apr
50.3 mm (2.0 in)
7 April 1922
May
71.1 mm (2.8 in)
13 May 1933
Jun
63.5 mm (2.5 in)
25 June 1905
Jul
57.2 mm (2.3 in)
4 July 1905
Aug
57.2 mm (2.3 in)
31 August 1938
Sep
76.2 mm (3.0 in)
22 September 1909
Oct
63.5 mm (2.5 in)
21 October 1909
Nov
39.9 mm (1.6 in)
23 November 1912
Dec
63.5 mm (2.5 in)
13 December 1909
Period of Record Coverage
1900 to 1938
Complete yearUnder 90 percent of days
39 years of record at Mackinac Island, 1900 to 1938. 7 years have data for under 90 percent of days and are left out of rankings: 1900, 1907, 1908, 1910, 1935, 1936, 1937.
Cooler than the station meanWarmer than the station mean
One stripe for each of 22 complete years at Mackinac Island, 1901 to 1938. Blue stripes are years cooler than the station's own mean of 5.4 C (41.7 F); red stripes are warmer. The coolest year was 1934, at 3.3 C (38.0 F), and the warmest was 1931, at 7.4 C (45.3 F). The strongest colour marks a difference of 2.1 C (3.8 F).
Annual mean temperature at Mackinac Island as warming stripes, 1901 to 1938
Year
Annual mean temperature
Difference from the station mean
1901
5.6 C
+0.18 C
1903
5.4 C
+0.00 C
1911
5.8 C
+0.42 C
1912
4.0 C
-1.38 C
1915
5.6 C
+0.26 C
1917
3.9 C
-1.48 C
1918
5.5 C
+0.16 C
1919
6.7 C
+1.30 C
1920
5.5 C
+0.12 C
1921
6.9 C
+1.50 C
1922
6.1 C
+0.75 C
1923
4.6 C
-0.77 C
1924
3.7 C
-1.65 C
1925
5.4 C
+0.00 C
1926
4.4 C
-0.98 C
1928
5.4 C
+0.04 C
1929
4.7 C
-0.70 C
1930
5.8 C
+0.43 C
1931
7.4 C
+2.00 C
1932
6.3 C
+0.88 C
1934
3.3 C
-2.07 C
1938
6.3 C
+0.90 C
This station does not have enough complete years (30 are needed) to fit a temperature trend.
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
1900 to 1938
Yearly extremes at Mackinac Island: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
37.2 C (99.0 F)
1911
30.6 C (87.1 F)
39
Coldest night (TNn)
-32.8 C (-27.0 F)
1934
-26.1 C (-15.0 F)
39
Wettest day (Rx1day)
81.3 mm (3.2 in)
1914
45.7 mm (1.8 in)
39
Wettest five days (Rx5day)
151.1 mm (5.9 in)
1904
72.1 mm (2.8 in)
39
Longest dry spell (CDD)
76 days
1934
21 days
39
Hottest day (TXx)
The hottest day of the year at Mackinac Island, 1900 to 1938. The record is 37.2 C (99.0 F) in 1911, marked on the chart; the median year is 30.6 C (87.1 F).
Hottest day (TXx) at Mackinac Island by year
Year
Hottest day (TXx)
1900
29.4 C (84.9 F)
1901
30.6 C (87.1 F)
1902
29.4 C (84.9 F)
1903
26.7 C (80.1 F)
1904
29.4 C (84.9 F)
1905
28.9 C (84.0 F)
1906
30.0 C (86.0 F)
1907
27.2 C (81.0 F)
1908
30.6 C (87.1 F)
1909
30.0 C (86.0 F)
1910
10.0 C (50.0 F)
1911
37.2 C (99.0 F)
1912
32.8 C (91.0 F)
1913
30.6 C (87.1 F)
1914
35.6 C (96.1 F)
1915
32.2 C (90.0 F)
1916
33.9 C (93.0 F)
1917
33.9 C (93.0 F)
1918
31.1 C (88.0 F)
1919
32.2 C (90.0 F)
1920
28.9 C (84.0 F)
1921
33.3 C (91.9 F)
1922
30.0 C (86.0 F)
1923
28.9 C (84.0 F)
1924
28.9 C (84.0 F)
1925
31.1 C (88.0 F)
1926
28.9 C (84.0 F)
1927
31.7 C (89.1 F)
1928
30.6 C (87.1 F)
1929
31.7 C (89.1 F)
1930
30.6 C (87.1 F)
1931
35.0 C (95.0 F)
1932
31.1 C (88.0 F)
1933
29.4 C (84.9 F)
1934
29.4 C (84.9 F)
1935
23.9 C (75.0 F)
1936
36.1 C (97.0 F)
1937
31.7 C (89.1 F)
1938
31.7 C (89.1 F)
Coldest night (TNn)
The coldest night of the year at Mackinac Island, 1900 to 1938. The record is -32.8 C (-27.0 F) in 1934, marked on the chart; the median year is -26.1 C (-15.0 F).
Coldest night (TNn) at Mackinac Island by year
Year
Coldest night (TNn)
1900
-20.0 C (-4.0 F)
1901
-27.2 C (-17.0 F)
1902
-22.2 C (-8.0 F)
1903
-25.0 C (-13.0 F)
1904
-30.6 C (-23.1 F)
1905
-27.2 C (-17.0 F)
1906
-25.6 C (-14.1 F)
1907
-25.0 C (-13.0 F)
1908
-27.8 C (-18.0 F)
1909
-23.9 C (-11.0 F)
1910
-22.2 C (-8.0 F)
1911
-21.1 C (-6.0 F)
1912
-31.1 C (-24.0 F)
1913
-26.7 C (-16.1 F)
1914
-32.2 C (-26.0 F)
1915
-24.4 C (-11.9 F)
1916
-23.3 C (-9.9 F)
1917
-30.6 C (-23.1 F)
1918
-32.2 C (-26.0 F)
1919
-26.1 C (-15.0 F)
1920
-28.3 C (-18.9 F)
1921
-20.0 C (-4.0 F)
1922
-17.8 C (0.0 F)
1923
-23.9 C (-11.0 F)
1924
-26.1 C (-15.0 F)
1925
-26.1 C (-15.0 F)
1926
-27.8 C (-18.0 F)
1927
-31.7 C (-25.1 F)
1928
-29.4 C (-20.9 F)
1929
-26.7 C (-16.1 F)
1930
-27.8 C (-18.0 F)
1931
-21.1 C (-6.0 F)
1932
-17.8 C (0.0 F)
1933
-25.0 C (-13.0 F)
1934
-32.8 C (-27.0 F)
1935
-23.9 C (-11.0 F)
1936
-28.3 C (-18.9 F)
1937
-19.4 C (-2.9 F)
1938
-26.7 C (-16.1 F)
Wettest day (Rx1day)
The wettest day of the year at Mackinac Island, 1900 to 1938. The record is 81.3 mm (3.2 in) in 1914, marked on the chart; the median year is 45.7 mm (1.8 in).
Wettest day (Rx1day) at Mackinac Island by year
Year
Wettest day (Rx1day)
1900
45.7 mm (1.8 in)
1901
49.8 mm (2.0 in)
1902
38.1 mm (1.5 in)
1903
51.3 mm (2.0 in)
1904
61.0 mm (2.4 in)
1905
63.5 mm (2.5 in)
1906
40.6 mm (1.6 in)
1907
30.5 mm (1.2 in)
1908
50.8 mm (2.0 in)
1909
76.2 mm (3.0 in)
1910
15.2 mm (0.6 in)
1911
37.3 mm (1.5 in)
1912
39.9 mm (1.6 in)
1913
48.3 mm (1.9 in)
1914
81.3 mm (3.2 in)
1915
45.7 mm (1.8 in)
1916
24.4 mm (1.0 in)
1917
48.3 mm (1.9 in)
1918
36.6 mm (1.4 in)
1919
38.1 mm (1.5 in)
1920
45.7 mm (1.8 in)
1921
50.8 mm (2.0 in)
1922
50.8 mm (2.0 in)
1923
41.7 mm (1.6 in)
1924
31.0 mm (1.2 in)
1925
38.1 mm (1.5 in)
1926
37.3 mm (1.5 in)
1927
38.6 mm (1.5 in)
1928
43.2 mm (1.7 in)
1929
55.9 mm (2.2 in)
1930
51.6 mm (2.0 in)
1931
66.0 mm (2.6 in)
1932
35.6 mm (1.4 in)
1933
71.1 mm (2.8 in)
1934
50.8 mm (2.0 in)
1935
42.7 mm (1.7 in)
1936
44.7 mm (1.8 in)
1937
35.6 mm (1.4 in)
1938
57.2 mm (2.3 in)
Wettest five days (Rx5day)
The wettest five days of the year at Mackinac Island, 1900 to 1938. The record is 151.1 mm (5.9 in) in 1904, marked on the chart; the median year is 72.1 mm (2.8 in).
Wettest five days (Rx5day) at Mackinac Island by year
Year
Wettest five days (Rx5day)
1900
97.3 mm (3.8 in)
1901
56.6 mm (2.2 in)
1902
63.6 mm (2.5 in)
1903
94.7 mm (3.7 in)
1904
151.1 mm (5.9 in)
1905
138.5 mm (5.5 in)
1906
71.0 mm (2.8 in)
1907
99.0 mm (3.9 in)
1908
81.3 mm (3.2 in)
1909
118.1 mm (4.6 in)
1910
15.7 mm (0.6 in)
1911
100.0 mm (3.9 in)
1912
71.9 mm (2.8 in)
1913
76.5 mm (3.0 in)
1914
81.3 mm (3.2 in)
1915
54.3 mm (2.1 in)
1916
33.1 mm (1.3 in)
1917
83.3 mm (3.3 in)
1918
59.7 mm (2.4 in)
1919
84.4 mm (3.3 in)
1920
70.7 mm (2.8 in)
1921
100.6 mm (4.0 in)
1922
126.5 mm (5.0 in)
1923
68.7 mm (2.7 in)
1924
43.2 mm (1.7 in)
1925
50.8 mm (2.0 in)
1926
52.6 mm (2.1 in)
1927
53.8 mm (2.1 in)
1928
86.4 mm (3.4 in)
1929
66.8 mm (2.6 in)
1930
56.9 mm (2.2 in)
1931
118.8 mm (4.7 in)
1932
72.1 mm (2.8 in)
1933
119.4 mm (4.7 in)
1934
50.8 mm (2.0 in)
1935
91.2 mm (3.6 in)
1936
62.0 mm (2.4 in)
1937
77.2 mm (3.0 in)
1938
57.2 mm (2.3 in)
Longest dry spell (CDD)
The longest dry spell of the year at Mackinac Island, 1900 to 1938. The record is 76 days in 1934, marked on the chart; the median year is 21 days.
Longest dry spell (CDD) at Mackinac Island by year
Year
Longest dry spell (CDD)
1900
21 days
1901
21 days
1902
16 days
1903
23 days
1904
20 days
1905
15 days
1906
18 days
1907
15 days
1908
12 days
1909
14 days
1910
16 days
1911
21 days
1912
23 days
1913
24 days
1914
55 days
1915
26 days
1916
25 days
1917
20 days
1918
24 days
1919
45 days
1920
18 days
1921
23 days
1922
28 days
1923
22 days
1924
21 days
1925
20 days
1926
22 days
1927
17 days
1928
23 days
1929
18 days
1930
21 days
1931
32 days
1932
24 days
1933
18 days
1934
76 days
1935
14 days
1936
21 days
1937
23 days
1938
18 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
22 years with a frost
Across 22 years with a frost, the median last spring frost at Mackinac Island falls on 17 May and the median first autumn frost on 7 October, which leaves a median of 146 days between them.
Frost dates and growing season at Mackinac Island
Measure
Median, all years
Earliest period
Recent period (1901 to 1938)
Recent against earliest
Fitted trend
Last spring frost
17 May
n/a
17 May
n/a
n/a
First autumn frost
7 October
n/a
7 October
n/a
n/a
Growing days
146 days
n/a
146 days
n/a
n/a
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.
Download the Data
Data for Mackinac Island standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Mackinac Island 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.