Onaway 12 S Threshold Days by Year (USC00206189)

19 fixed thresholds counted per year at Onaway 12 S (USC00206189): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Onaway 12 S Thresholds

Onaway 12 S: nights with a minimum temperature at or below 0 C (32 F) in 48 years, most in 1935 with 211.
Onaway 12 S: nights with a minimum temperature at or below -10 C (14 F) in 48 years, most in 1917 with 94.
Onaway 12 S: nights with a minimum temperature at or below -20 C (-4 F) in 48 years, most in 1917 with 36.
Onaway 12 S: days with a maximum temperature at or above 30 C (86 F) in 46 years, most in 1933 with 47.
19 fixed thresholds have at least one qualifying day at Onaway 12 S.

Days at or above 30 C (86 F)

46 years with a qualifying day

Days per year at Onaway 12 S with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 47 in 1933.

Days at or above 30 C (86 F) per year at Onaway 12 S
Year	Days	Decade average
1901	19	13.2
1902	10	13.2
1903	7	13.2
1904	6	13.2
1905	1	13.2
1908	36	13.2
1911	22	21.5
1912	15	21.5
1913	31	21.5
1917	9	21.5
1918	18	21.5
1919	34	21.5
1920	13	18.9
1921	34	18.9
1922	18	18.9
1924	7	18.9
1925	24	18.9
1926	13	18.9
1927	21	18.9
1928	15	18.9
1929	25	18.9
1930	30	33.4
1931	34	33.4
1932	24	33.4
1933	47	33.4
1934	36	33.4
1935	27	33.4
1936	37	33.4
1937	43	33.4
1938	26	33.4
1939	30	33.4
1940	23	27.9
1941	34	27.9
1942	18	27.9
1943	29	27.9
1944	32	27.9
1945	23	27.9
1946	18	27.9
1947	37	27.9
1948	27	27.9
1949	38	27.9
1950	16	24
1951	11	24
1952	27	24
1953	36	24
1954	30	24

For each year, a bar from the first to the last day at Onaway 12 S meeting 30 C (86 F).

First to last qualifying date each year at Onaway 12 S
Year	First date	Last date
1901	1901-06-05	1901-09-07
1902	1902-07-04	1902-08-02
1903	1903-05-17	1903-09-12
1904	1904-06-24	1904-08-21
1905	1905-08-10	1905-08-10
1908	1908-05-25	1908-09-26
1911	1911-05-19	1911-08-20
1912	1912-05-24	1912-09-06
1913	1913-06-14	1913-09-22
1917	1917-07-21	1917-07-31
1918	1918-05-05	1918-08-13
1919	1919-05-28	1919-10-02
1920	1920-05-31	1920-09-26
1921	1921-04-25	1921-09-09
1922	1922-05-11	1922-09-30
1924	1924-06-22	1924-08-31
1925	1925-05-31	1925-08-30
1926	1926-05-07	1926-08-28
1927	1927-05-22	1927-09-16
1928	1928-07-02	1928-10-11
1929	1929-05-28	1929-09-05
1930	1930-05-05	1930-09-12
1931	1931-05-27	1931-09-14
1932	1932-05-15	1932-09-19
1933	1933-05-24	1933-09-23
1934	1934-05-04	1934-09-25
1935	1935-06-16	1935-08-20
1936	1936-05-07	1936-09-23
1937	1937-05-29	1937-09-23
1938	1938-04-27	1938-10-10
1939	1939-05-06	1939-09-16
1940	1940-05-21	1940-09-20
1941	1941-05-20	1941-09-22
1942	1942-04-25	1942-09-17
1943	1943-06-03	1943-09-01
1944	1944-05-28	1944-08-30
1945	1945-06-14	1945-09-08
1946	1946-06-23	1946-09-19
1947	1947-06-10	1947-10-16
1948	1948-06-01	1948-09-17
1949	1949-05-03	1949-08-27
1950	1950-06-07	1950-08-24
1951	1951-05-02	1951-09-12
1952	1952-06-06	1952-09-13
1953	1953-05-08	1953-10-03
1954	1954-05-24	1954-09-02

Every Fixed Threshold

Fixed thresholds at Onaway 12 S
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	46	47	1933	30
35 C (95 F): Days	33	11	1933	2
40 C (104 F): Days	2	7	1936	7
90 F (32.2 C): Days	45	30	1937	13
100 F (37.8 C): Days	8	7	1936	1
0 C (32 F): Ice days (max	46	101	1904	55
0 C (32 F): Frost days (min	48	211	1935	171
-10 C (14 F): Days with min	48	94	1917	60
-20 C (-4 F): Days with min	48	36	1917	14
-30 C (-22 F): Days with min	26	7	1935	6
-40 C (-40 F): Days with min	1	2	1934	2
20 C (68 F): Tropical nights (min	42	11	1947	1
25 C (77 F): Days with min	2	2	1917	2
10 mm (0.39 in): Days with 10 mm or more rain	39	38	1903	25
25 mm (0.98 in): Days with 25 mm or more rain	39	9	1928	8
50 mm (1.97 in): Days with 50 mm or more rain	16	2	1928	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1937	1
10 cm (3.9 in): Days with 10 cm or more snowfall	26	14	1926	2
25 cm (9.8 in): Days with 25 cm or more snowfall	6	2	1928	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1901.

Download the Data

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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Onaway 12 S Threshold Days by Year (USC00206189)

Key Facts for Onaway 12 S Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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