Record envelope, standing records and threshold days for Onaway 12 S (USC00206189), Michigan, United States, with 56 years of record.
Key Facts for Onaway 12 S
Onaway 12 S (USC00206189) is a weather station in Michigan, United States at 45.18 latitude and -84.20 longitude, 271 m (889 ft) above sea level.
The station reports from 1900 to 1955, 56 years of record.
1,464 records set at Onaway 12 S still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Onaway 12 S set a daily record high maximum temperature of 33.3 C (91.9 F) on 17 June 1955.
About the Station
Location: Michigan, United States, 45.18 latitude, -84.20 longitude.
Elevation: 271 m (889 ft).
Period of record: 1900 to 1955, 56 years.
Eligible elements: tmax, tmin, prcp, snow.
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 Onaway 12 S. 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 Onaway 12 S, 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)
-37.8 C (-36.0 F)
n/a
n/a
Feb
15.6 C (60.1 F)
-43.3 C (-45.9 F)
n/a
n/a
Mar
27.2 C (81.0 F)
-34.4 C (-29.9 F)
n/a
n/a
Apr
30.6 C (87.1 F)
-24.4 C (-11.9 F)
n/a
n/a
May
35.6 C (96.1 F)
-8.9 C (16.0 F)
n/a
n/a
Jun
40.6 C (105.1 F)
-4.4 C (24.1 F)
n/a
n/a
Jul
41.7 C (107.1 F)
-1.1 C (30.0 F)
n/a
n/a
Aug
39.4 C (102.9 F)
-2.2 C (28.0 F)
n/a
n/a
Sep
35.6 C (96.1 F)
-7.8 C (18.0 F)
n/a
n/a
Oct
32.2 C (90.0 F)
-12.8 C (9.0 F)
n/a
n/a
Nov
25.0 C (77.0 F)
-24.4 C (-11.9 F)
n/a
n/a
Dec
15.6 C (60.1 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 Onaway 12 S still stand. 1912 holds the most, with 44.
Standing records at Onaway 12 S by the year they were set
Year set
Standing records
1900
1
1901
22
1902
18
1903
29
1904
17
1905
25
1906
24
1907
10
1908
28
1909
23
1910
8
1911
25
1912
44
1913
28
1914
16
1915
7
1916
25
1917
43
1918
36
1919
18
1920
32
1921
29
1922
22
1923
39
1924
29
1925
43
1926
23
1927
28
1928
27
1929
41
1930
39
1931
40
1932
33
1933
28
1934
44
1935
18
1936
39
1937
32
1938
39
1939
29
1940
21
1941
18
1942
22
1943
23
1944
16
1945
39
1946
26
1947
38
1948
20
1949
27
1950
28
1951
30
1952
17
1953
23
1954
12
1955
3
All-Time Record Progression
6 new records
6 all-time records were set at Onaway 12 S between 8 February 1934 and 3 September 1937. Each dot is a new record.
When Onaway 12 S set new all-time records
Date
Kind
Detail
1934-02-08
Record low minimum temperature
Record low minimum temperature -41.7 C (-43.1 F)
1934-02-09
Record low minimum temperature
Record low minimum temperature -43.3 C (-45.9 F)
1934-06-01
Record high maximum temperature
Record high maximum temperature 40.6 C (105.1 F)
1936-07-08
Record high maximum temperature
Record high maximum temperature 41.1 C (106.0 F)
1936-07-11
Record high maximum temperature
Record high maximum temperature 41.7 C (107.1 F)
1937-09-03
Record daily precipitation
Record daily precipitation 132.8 mm (5.2 in)
Wettest Day of Each Month
Sep: 132.8 mm (5.2 in)
The wettest day on record for each calendar month at Onaway 12 S. The most was 132.8 mm (5.2 in) on 3 September 1937.
Record daily precipitation for each month at Onaway 12 S
Month
Record daily precipitation (mm)
Date
Jan
28.4 mm (1.1 in)
24 January 1938
Feb
54.6 mm (2.1 in)
22 February 1922
Mar
50.8 mm (2.0 in)
9 March 1928
Apr
50.8 mm (2.0 in)
16 April 1931
May
73.7 mm (2.9 in)
27 May 1941
Jun
76.2 mm (3.0 in)
30 June 1908
Jul
62.5 mm (2.5 in)
26 July 1937
Aug
68.6 mm (2.7 in)
7 August 1939
Sep
132.8 mm (5.2 in)
3 September 1937
Oct
58.4 mm (2.3 in)
6 October 1911
Nov
61.0 mm (2.4 in)
7 November 1924
Dec
45.7 mm (1.8 in)
27 December 1942
Period of Record Coverage
1900 to 1955
Complete yearUnder 90 percent of days
56 years of record at Onaway 12 S, 1900 to 1955. 10 years have data for under 90 percent of days and are left out of rankings: 1900, 1906, 1907, 1909, 1910, 1914, 1915, 1916 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 39 complete years at Onaway 12 S, 1902 to 1954. Blue stripes are years cooler than the station's own mean of 6.0 C (42.8 F); red stripes are warmer. The coolest year was 1917, at 3.3 C (37.9 F), and the warmest was 1931, at 8.3 C (46.9 F). The strongest colour marks a difference of 2.8 C (5.0 F).
Annual mean temperature at Onaway 12 S as warming stripes, 1902 to 1954
Year
Annual mean temperature
Difference from the station mean
1902
6.4 C
+0.38 C
1903
6.1 C
+0.06 C
1911
5.8 C
-0.28 C
1912
4.8 C
-1.27 C
1913
6.4 C
+0.39 C
1917
3.3 C
-2.77 C
1918
5.2 C
-0.80 C
1919
6.3 C
+0.29 C
1920
5.5 C
-0.51 C
1921
7.6 C
+1.60 C
1922
6.3 C
+0.30 C
1924
4.4 C
-1.67 C
1925
5.4 C
-0.63 C
1927
5.9 C
-0.11 C
1928
6.0 C
-0.07 C
1929
5.0 C
-1.08 C
1930
6.5 C
+0.45 C
1931
8.3 C
+2.23 C
1932
6.8 C
+0.74 C
1933
6.4 C
+0.37 C
1934
5.2 C
-0.81 C
1935
5.4 C
-0.65 C
1936
5.2 C
-0.81 C
1937
6.1 C
+0.08 C
1938
6.7 C
+0.62 C
1939
6.0 C
+0.01 C
1940
5.5 C
-0.56 C
1941
7.0 C
+0.92 C
1942
6.4 C
+0.36 C
1943
5.3 C
-0.76 C
1944
6.8 C
+0.72 C
1945
5.7 C
-0.31 C
1946
6.9 C
+0.84 C
1948
6.5 C
+0.44 C
1949
7.3 C
+1.27 C
1950
5.4 C
-0.62 C
1951
5.7 C
-0.35 C
1952
7.1 C
+1.06 C
1954
6.9 C
+0.83 C
The fitted trend in annual mean temperature here over 1902 to 1954 is 0.18 C (-0.04 to 0.40) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.3 F (-0.1 to 0.7) per decade. The slope is a straight line fitted to 39 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Onaway 12 S
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.18 C (-0.04 to 0.40) per decade
0.3 F (-0.1 to 0.7) per decade
1902 to 1954
39
Not clearly different from zero
Mean daily maximum
0.3 C (0.1 to 0.6) per decade
0.6 F (0.2 to 1.0) per decade
1902 to 1954
39
Rise
Mean daily minimum
0.02 C (-0.22 to 0.26) per decade
0.03 F (-0.40 to 0.46) per decade
1902 to 1954
39
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
1900 to 1955
Yearly extremes at Onaway 12 S: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
41.7 C (107.1 F)
1936
35.6 C (96.1 F)
56
Coldest night (TNn)
-43.3 C (-45.9 F)
1934
-29.1 C (-20.5 F)
56
Wettest day (Rx1day)
132.8 mm (5.2 in)
1937
37.7 mm (1.5 in)
56
Wettest five days (Rx5day)
157.7 mm (6.2 in)
1937
55.4 mm (2.2 in)
55
Longest dry spell (CDD)
37 days
1912
20 days
55
Hottest day (TXx)
The hottest day of the year at Onaway 12 S, 1900 to 1955. The record is 41.7 C (107.1 F) in 1936, marked on the chart; the median year is 35.6 C (96.1 F).
Hottest day (TXx) at Onaway 12 S by year
Year
Hottest day (TXx)
1900
8.3 C (46.9 F)
1901
37.2 C (99.0 F)
1902
36.1 C (97.0 F)
1903
32.2 C (90.0 F)
1904
35.0 C (95.0 F)
1905
30.6 C (87.1 F)
1906
35.0 C (95.0 F)
1907
33.3 C (91.9 F)
1908
34.4 C (93.9 F)
1909
34.4 C (93.9 F)
1910
36.7 C (98.1 F)
1911
37.8 C (100.0 F)
1912
33.3 C (91.9 F)
1913
35.0 C (95.0 F)
1914
35.0 C (95.0 F)
1915
33.3 C (91.9 F)
1916
38.9 C (102.0 F)
1917
38.9 C (102.0 F)
1918
35.6 C (96.1 F)
1919
36.7 C (98.1 F)
1920
33.9 C (93.0 F)
1921
37.8 C (100.0 F)
1922
33.3 C (91.9 F)
1923
35.0 C (95.0 F)
1924
32.2 C (90.0 F)
1925
34.4 C (93.9 F)
1926
36.1 C (97.0 F)
1927
37.2 C (99.0 F)
1928
35.0 C (95.0 F)
1929
35.6 C (96.1 F)
1930
36.1 C (97.0 F)
1931
37.2 C (99.0 F)
1932
36.7 C (98.1 F)
1933
38.3 C (100.9 F)
1934
40.6 C (105.1 F)
1935
36.1 C (97.0 F)
1936
41.7 C (107.1 F)
1937
36.7 C (98.1 F)
1938
36.1 C (97.0 F)
1939
35.6 C (96.1 F)
1940
34.4 C (93.9 F)
1941
36.1 C (97.0 F)
1942
35.6 C (96.1 F)
1943
34.4 C (93.9 F)
1944
35.6 C (96.1 F)
1945
37.2 C (99.0 F)
1946
33.3 C (91.9 F)
1947
39.4 C (102.9 F)
1948
37.8 C (100.0 F)
1949
36.7 C (98.1 F)
1950
34.4 C (93.9 F)
1951
32.2 C (90.0 F)
1952
35.6 C (96.1 F)
1953
37.2 C (99.0 F)
1954
35.6 C (96.1 F)
1955
33.9 C (93.0 F)
Coldest night (TNn)
The coldest night of the year at Onaway 12 S, 1900 to 1955. The record is -43.3 C (-45.9 F) in 1934, marked on the chart; the median year is -29.1 C (-20.5 F).
Coldest night (TNn) at Onaway 12 S by year
Year
Coldest night (TNn)
1900
-14.4 C (6.1 F)
1901
-26.1 C (-15.0 F)
1902
-25.0 C (-13.0 F)
1903
-26.7 C (-16.1 F)
1904
-31.1 C (-24.0 F)
1905
-28.3 C (-18.9 F)
1906
-27.2 C (-17.0 F)
1907
-16.7 C (1.9 F)
1908
-27.8 C (-18.0 F)
1909
-20.0 C (-4.0 F)
1910
-26.7 C (-16.1 F)
1911
-22.2 C (-8.0 F)
1912
-30.6 C (-23.1 F)
1913
-26.7 C (-16.1 F)
1914
-31.7 C (-25.1 F)
1915
-25.6 C (-14.1 F)
1916
-25.0 C (-13.0 F)
1917
-32.8 C (-27.0 F)
1918
-35.0 C (-31.0 F)
1919
-31.1 C (-24.0 F)
1920
-37.8 C (-36.0 F)
1921
-25.0 C (-13.0 F)
1922
-26.1 C (-15.0 F)
1923
-28.9 C (-20.0 F)
1924
-30.6 C (-23.1 F)
1925
-30.0 C (-22.0 F)
1926
-32.2 C (-26.0 F)
1927
-34.4 C (-29.9 F)
1928
-33.3 C (-27.9 F)
1929
-33.3 C (-27.9 F)
1930
-33.9 C (-29.0 F)
1931
-22.8 C (-9.0 F)
1932
-25.6 C (-14.1 F)
1933
-33.3 C (-27.9 F)
1934
-43.3 C (-45.9 F)
1935
-35.0 C (-31.0 F)
1936
-32.2 C (-26.0 F)
1937
-27.8 C (-18.0 F)
1938
-35.0 C (-31.0 F)
1939
-31.7 C (-25.1 F)
1940
-28.9 C (-20.0 F)
1941
-30.0 C (-22.0 F)
1942
-31.1 C (-24.0 F)
1943
-35.6 C (-32.1 F)
1944
-27.2 C (-17.0 F)
1945
-33.9 C (-29.0 F)
1946
-29.4 C (-20.9 F)
1947
-32.8 C (-27.0 F)
1948
-33.3 C (-27.9 F)
1949
-23.9 C (-11.0 F)
1950
-28.3 C (-18.9 F)
1951
-34.4 C (-29.9 F)
1952
-28.3 C (-18.9 F)
1953
-28.3 C (-18.9 F)
1954
-28.3 C (-18.9 F)
1955
-28.3 C (-18.9 F)
Wettest day (Rx1day)
The wettest day of the year at Onaway 12 S, 1900 to 1955. The record is 132.8 mm (5.2 in) in 1937, marked on the chart; the median year is 37.7 mm (1.5 in).
Wettest day (Rx1day) at Onaway 12 S by year
Year
Wettest day (Rx1day)
1900
4.1 mm (0.16 in)
1901
36.6 mm (1.4 in)
1902
36.3 mm (1.4 in)
1903
35.6 mm (1.4 in)
1904
27.9 mm (1.1 in)
1905
24.9 mm (1.0 in)
1906
21.3 mm (0.8 in)
1907
12.7 mm (0.5 in)
1908
76.2 mm (3.0 in)
1909
21.6 mm (0.9 in)
1910
35.6 mm (1.4 in)
1911
58.4 mm (2.3 in)
1912
30.5 mm (1.2 in)
1913
24.1 mm (0.9 in)
1914
27.7 mm (1.1 in)
1915
63.5 mm (2.5 in)
1916
35.6 mm (1.4 in)
1917
32.8 mm (1.3 in)
1918
55.9 mm (2.2 in)
1919
30.5 mm (1.2 in)
1920
43.9 mm (1.7 in)
1921
40.4 mm (1.6 in)
1922
54.6 mm (2.1 in)
1923
51.6 mm (2.0 in)
1924
61.0 mm (2.4 in)
1925
47.2 mm (1.9 in)
1926
47.8 mm (1.9 in)
1927
51.1 mm (2.0 in)
1928
56.6 mm (2.2 in)
1929
38.1 mm (1.5 in)
1930
35.6 mm (1.4 in)
1931
50.8 mm (2.0 in)
1932
61.0 mm (2.4 in)
1933
36.3 mm (1.4 in)
1934
28.2 mm (1.1 in)
1935
33.0 mm (1.3 in)
1936
43.9 mm (1.7 in)
1937
132.8 mm (5.2 in)
1938
28.4 mm (1.1 in)
1939
68.6 mm (2.7 in)
1940
53.1 mm (2.1 in)
1941
73.7 mm (2.9 in)
1942
45.7 mm (1.8 in)
1943
55.4 mm (2.2 in)
1944
38.6 mm (1.5 in)
1945
36.8 mm (1.4 in)
1946
56.4 mm (2.2 in)
1947
50.5 mm (2.0 in)
1948
37.3 mm (1.5 in)
1949
30.5 mm (1.2 in)
1950
37.3 mm (1.5 in)
1951
60.5 mm (2.4 in)
1952
25.1 mm (1.0 in)
1953
35.8 mm (1.4 in)
1954
50.3 mm (2.0 in)
1955
26.4 mm (1.0 in)
Wettest five days (Rx5day)
The wettest five days of the year at Onaway 12 S, 1900 to 1955. The record is 157.7 mm (6.2 in) in 1937, marked on the chart; the median year is 55.4 mm (2.2 in).
Wettest five days (Rx5day) at Onaway 12 S by year
Year
Wettest five days (Rx5day)
1900
4.1 mm (0.16 in)
1901
50.5 mm (2.0 in)
1902
57.2 mm (2.3 in)
1903
58.2 mm (2.3 in)
1904
44.4 mm (1.7 in)
1905
27.9 mm (1.1 in)
1906
29.9 mm (1.2 in)
1907
n/a
1908
81.3 mm (3.2 in)
1909
40.6 mm (1.6 in)
1910
48.3 mm (1.9 in)
1911
96.5 mm (3.8 in)
1912
30.5 mm (1.2 in)
1913
35.6 mm (1.4 in)
1914
25.4 mm (1.0 in)
1915
85.6 mm (3.4 in)
1916
40.7 mm (1.6 in)
1917
45.0 mm (1.8 in)
1918
115.3 mm (4.5 in)
1919
51.1 mm (2.0 in)
1920
50.3 mm (2.0 in)
1921
53.1 mm (2.1 in)
1922
95.7 mm (3.8 in)
1923
51.6 mm (2.0 in)
1924
66.1 mm (2.6 in)
1925
52.3 mm (2.1 in)
1926
74.5 mm (2.9 in)
1927
71.5 mm (2.8 in)
1928
103.1 mm (4.1 in)
1929
66.8 mm (2.6 in)
1930
53.4 mm (2.1 in)
1931
54.1 mm (2.1 in)
1932
80.6 mm (3.2 in)
1933
48.8 mm (1.9 in)
1934
50.2 mm (2.0 in)
1935
59.4 mm (2.3 in)
1936
62.7 mm (2.5 in)
1937
157.7 mm (6.2 in)
1938
47.2 mm (1.9 in)
1939
92.0 mm (3.6 in)
1940
78.0 mm (3.1 in)
1941
58.7 mm (2.3 in)
1942
48.0 mm (1.9 in)
1943
62.6 mm (2.5 in)
1944
61.7 mm (2.4 in)
1945
55.4 mm (2.2 in)
1946
71.4 mm (2.8 in)
1947
60.9 mm (2.4 in)
1948
52.6 mm (2.1 in)
1949
44.7 mm (1.8 in)
1950
89.4 mm (3.5 in)
1951
72.2 mm (2.8 in)
1952
58.5 mm (2.3 in)
1953
50.8 mm (2.0 in)
1954
79.0 mm (3.1 in)
1955
41.1 mm (1.6 in)
Longest dry spell (CDD)
The longest dry spell of the year at Onaway 12 S, 1900 to 1955. The record is 37 days in 1912, marked on the chart; the median year is 20 days.
Longest dry spell (CDD) at Onaway 12 S by year
Year
Longest dry spell (CDD)
1900
27 days
1901
26 days
1902
33 days
1903
24 days
1904
16 days
1905
17 days
1906
27 days
1907
n/a
1908
18 days
1909
18 days
1910
24 days
1911
16 days
1912
37 days
1913
28 days
1914
19 days
1915
28 days
1916
11 days
1917
17 days
1918
20 days
1919
22 days
1920
18 days
1921
27 days
1922
16 days
1923
21 days
1924
32 days
1925
21 days
1926
17 days
1927
19 days
1928
31 days
1929
20 days
1930
26 days
1931
13 days
1932
19 days
1933
18 days
1934
17 days
1935
28 days
1936
19 days
1937
17 days
1938
14 days
1939
20 days
1940
14 days
1941
6 days
1942
6 days
1943
20 days
1944
21 days
1945
21 days
1946
24 days
1947
22 days
1948
21 days
1949
21 days
1950
15 days
1951
13 days
1952
22 days
1953
19 days
1954
24 days
1955
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
39 years with a frost
Across 39 years with a frost, the median last spring frost at Onaway 12 S falls on 9 June and the median first autumn frost on 2 September, which leaves a median of 90 days between them.
Fitted over all years, the growing season changes by +0.9 days per decade at this station.
Frost dates and growing season at Onaway 12 S
Measure
Median, all years
Earliest period
Recent period (1921 to 1954)
Recent against earliest
Fitted trend
Last spring frost
9 June
n/a
9 June
n/a
-0.7 days per decade
First autumn frost
2 September
n/a
2 September
n/a
+0.2 days per decade
Growing days
90 days
n/a
86 days
n/a
+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
39 years, 1901 to 1954
A day with at least 42.5 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 106.2 mm (4.2 in) of rain is expected about once in 100 years.
Rainfall return levels at Onaway 12 S: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
42.5 mm (1.7 in)
5 years
55.9 mm (2.2 in)
10 years
66.1 mm (2.6 in)
25 years
80.7 mm (3.2 in)
50 years
92.8 mm (3.7 in)
Longer than the 39 years of record
100 years
106.2 mm (4.2 in)
Longer than the 39 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, 39 years of values from 1901 to 1954.
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: 132.8 mm (5.2 in) in 1937; 68.6 mm (2.7 in) in 1939; 61.0 mm (2.4 in) in 1924.
Download the Data
Data for Onaway 12 S standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Onaway 12 S 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.