Onawa 3NW Threshold Days by Year

20 fixed thresholds counted per year at Onawa 3NW (USC00136243): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Onawa 3NW Thresholds

Onawa 3NW: days with a maximum temperature at or above 30 C (86 F) in 102 years, most in 1936 with 97.
Onawa 3NW: days with a maximum temperature at or above 90 F (32.2 C) in 102 years, most in 1936 with 79.
Onawa 3NW: days with a maximum temperature at or below 0 C (32 F) in 102 years, most in 1978 with 76.
Onawa 3NW: nights with a minimum temperature at or below 0 C (32 F) in 102 years, most in 2008 with 172.
20 fixed thresholds have at least one qualifying day at Onawa 3NW.

Days at or above 30 C (86 F)

102 years with a qualifying day

Days per year at Onawa 3NW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 97 in 1936.

Days at or above 30 C (86 F) per year at Onawa 3NW
Year	Days	Decade average
1900	64	48.7
1902	40	48.7
1903	28	48.7
1904	40	48.7
1905	59	48.7
1906	41	48.7
1907	53	48.7
1908	56	48.7
1909	57	48.7
1910	58	62.9
1911	81	62.9
1912	57	62.9
1913	90	62.9
1914	81	62.9
1915	23	62.9
1916	62	62.9
1917	44	62.9
1919	70	62.9
1923	37	39.8
1924	18	39.8
1925	57	39.8
1927	46	39.8
1929	41	39.8
1930	53	74.5
1931	72	74.5
1932	43	74.5
1933	74	74.5
1934	92	74.5
1935	63	74.5
1936	97	74.5
1937	73	74.5
1938	83	74.5
1939	95	74.5
1940	64	69.6
1941	80	69.6
1942	59	69.6
1943	78	69.6
1944	69	69.6
1945	52	69.6
1946	60	69.6
1947	79	69.6
1948	84	69.6
1949	71	69.6
1950	40	66.5
1951	39	66.5
1952	65	66.5
1953	83	66.5
1954	78	66.5
1955	86	66.5
1956	85	66.5
1957	59	66.5
1958	57	66.5
1959	73	66.5
1960	45	51.6
1961	51	51.6
1962	53	51.6
1963	58	51.6
1964	60	51.6
1965	46	51.6
1966	55	51.6
1967	39	51.6
1968	55	51.6
1969	54	51.6
1970	84	63.7
1971	57	63.7
1972	52	63.7
1973	58	63.7
1974	53	63.7
1975	66	63.7
1976	80	63.7
1977	55	63.7
1978	68	63.7
1980	71	57.2
1981	48	57.2
1982	32	57.2
1983	77	57.2
1984	54	57.2
1985	49	57.2
1986	44	57.2
1987	64	57.2
1988	75	57.2
1989	58	57.2
1990	57	46.3
1991	69	46.3
1992	16	46.3
1993	27	46.3
1994	45	46.3
1995	61	46.3
1996	24	46.3
1997	52	46.3
1998	66	46.3
2000	79	62.4
2001	68	62.4
2002	74	62.4
2003	66	62.4
2004	51	62.4
2005	76	62.4
2006	80	62.4
2007	67	62.4
2008	35	62.4
2009	28	62.4
2010	62	62

For each year, a bar from the first to the last day at Onawa 3NW meeting 30 C (86 F).

First to last qualifying date each year at Onawa 3NW
Year	First date	Last date
1900	1900-05-11	1900-10-05
1902	1902-04-20	1902-09-07
1903	1903-06-15	1903-09-25
1904	1904-05-22	1904-09-28
1905	1905-05-01	1905-10-07
1906	1906-04-24	1906-09-25
1907	1907-03-26	1907-09-19
1908	1908-04-13	1908-09-23
1909	1909-05-04	1909-10-02
1910	1910-03-23	1910-10-02
1911	1911-05-08	1911-09-17
1912	1912-05-02	1912-10-05
1913	1913-04-30	1913-09-08
1914	1914-04-17	1914-09-06
1915	1915-04-28	1915-08-15
1916	1916-04-12	1916-10-03
1917	1917-05-17	1917-09-23
1919	1919-05-28	1919-10-01
1923	1923-06-01	1923-09-05
1924	1924-05-05	1924-08-30
1925	1925-04-22	1925-09-19
1927	1927-04-26	1927-09-17
1929	1929-04-04	1929-09-03
1930	1930-04-10	1930-10-11
1931	1931-04-08	1931-09-20
1932	1932-05-13	1932-09-18
1933	1933-05-16	1933-09-25
1934	1934-04-30	1934-10-08
1935	1935-06-12	1935-09-23
1936	1936-04-13	1936-10-05
1937	1937-05-20	1937-09-23
1938	1938-06-05	1938-10-16
1939	1939-04-23	1939-09-22
1940	1940-04-14	1940-09-22
1941	1941-05-14	1941-09-21
1942	1942-04-29	1942-10-07
1943	1943-03-30	1943-10-10
1944	1944-05-14	1944-09-20
1945	1945-05-06	1945-10-18
1946	1946-04-19	1946-09-26
1947	1947-05-14	1947-10-21
1948	1948-04-18	1948-09-19
1949	1949-04-25	1949-10-07
1950	1950-04-22	1950-10-30
1951	1951-05-30	1951-10-02
1952	1952-05-02	1952-09-30
1953	1953-05-24	1953-10-15
1954	1954-04-14	1954-09-27
1955	1955-04-18	1955-09-17
1956	1956-04-01	1956-10-12
1957	1957-05-01	1957-09-30
1958	1958-05-11	1958-10-19
1959	1959-04-30	1959-09-08
1960	1960-04-21	1960-10-11
1961	1961-05-11	1961-09-10
1962	1962-04-21	1962-10-11
1963	1963-05-08	1963-10-06
1964	1964-04-16	1964-09-09
1965	1965-04-29	1965-08-26
1966	1966-05-04	1966-10-27
1967	1967-03-24	1967-09-25
1968	1968-03-30	1968-09-13
1969	1969-05-15	1969-10-03
1970	1970-04-28	1970-09-29
1971	1971-05-15	1971-10-01
1972	1972-04-06	1972-09-19
1973	1973-05-20	1973-09-01
1974	1974-05-20	1974-09-18
1975	1975-05-18	1975-10-14
1976	1976-05-19	1976-10-03
1977	1977-04-09	1977-09-08
1978	1978-03-31	1978-09-18
1980	1980-04-20	1980-10-09
1981	1981-04-25	1981-09-29
1982	1982-06-06	1982-09-11
1983	1983-05-24	1983-09-27
1984	1984-06-05	1984-09-20
1985	1985-04-18	1985-09-18
1986	1986-03-28	1986-09-10
1987	1987-04-19	1987-09-26
1988	1988-04-08	1988-09-21
1989	1989-04-20	1989-09-06
1990	1990-04-22	1990-10-05
1991	1991-04-05	1991-10-01
1992	1992-04-30	1992-10-02
1993	1993-05-14	1993-10-07
1994	1994-04-17	1994-09-30
1995	1995-06-06	1995-10-12
1996	1996-04-11	1996-09-04
1997	1997-05-16	1997-10-07
1998	1998-05-17	1998-09-29
2000	2000-05-04	2000-10-01
2001	2001-04-26	2001-10-03
2002	2002-04-15	2002-10-02
2003	2003-04-01	2003-10-20
2004	2004-04-16	2004-09-20
2005	2005-05-20	2005-10-18
2006	2006-04-07	2006-10-04
2007	2007-04-30	2007-10-07
2008	2008-05-26	2008-09-02
2009	2009-04-24	2009-08-15
2010	2010-05-05	2010-10-09

Every Fixed Threshold

Fixed thresholds at Onawa 3NW
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	102	97	1936	62
35 C (95 F): Days	95	51	1936	2
40 C (104 F): Days	18	20	1936	2
90 F (32.2 C): Days	102	79	1936	19
100 F (37.8 C): Days	53	33	1936	7
110 F (43.3 C): Days	1	3	1936	3
0 C (32 F): Ice days (max	102	76	1978	73
0 C (32 F): Frost days (min	102	172	2008	151
-10 C (14 F): Days with min	102	80	1978	71
-20 C (-4 F): Days with min	102	35	1936	20
-30 C (-22 F): Days with min	33	5	1924	5
20 C (68 F): Tropical nights (min	102	49	1913	15
25 C (77 F): Days with min	24	9	1936	2
10 mm (0.39 in): Days with 10 mm or more rain	61	38	1984	22
25 mm (0.98 in): Days with 25 mm or more rain	61	12	1951	7
50 mm (1.97 in): Days with 50 mm or more rain	47	3	1952	1
100 mm (3.94 in): Days with 100 mm or more rain	5	2	1993	1
200 mm (7.87 in): Days with 200 mm or more rain	1	1	1996	1
10 cm (3.9 in): Days with 10 cm or more snowfall	79	7	1951	4
25 cm (9.8 in): Days with 25 cm or more snowfall	14	2	1915	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1900.

Download the Data

Data for Onawa 3NW 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

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

Onawa 3NW Threshold Days by Year

Key Facts for Onawa 3NW Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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