Oskaloosa Threshold Days by Year (USC00136327)

19 fixed thresholds counted per year at Oskaloosa (USC00136327): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Oskaloosa Thresholds

Oskaloosa: days with a maximum temperature at or above 30 C (86 F) in 113 years, most in 1934 with 94.
Oskaloosa: days with a maximum temperature at or below 0 C (32 F) in 113 years, most in 1978 with 77.
Oskaloosa: days with a maximum temperature at or above 90 F (32.2 C) in 112 years, most in 1934 with 73.
Oskaloosa: nights with a minimum temperature at or below 0 C (32 F) in 108 years, most in 1926 with 159.
19 fixed thresholds have at least one qualifying day at Oskaloosa.

Days at or above 30 C (86 F)

113 years with a qualifying day

Days per year at Oskaloosa with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 94 in 1934.

Days at or above 30 C (86 F) per year at Oskaloosa
Year	Days	Decade average
1893	52	60.3
1895	76	60.3
1896	51	60.3
1897	71	60.3
1898	53	60.3
1899	59	60.3
1900	56	38.5
1901	82	38.5
1902	16	38.5
1903	22	38.5
1904	17	38.5
1905	30	38.5
1906	41	38.5
1907	31	38.5
1908	49	38.5
1909	41	38.5
1910	57	51.9
1911	78	51.9
1912	44	51.9
1913	69	51.9
1914	65	51.9
1915	9	51.9
1916	55	51.9
1917	29	51.9
1918	51	51.9
1919	62	51.9
1920	44	43.5
1921	63	43.5
1922	51	43.5
1923	41	43.5
1924	23	43.5
1925	57	43.5
1926	46	43.5
1927	42	43.5
1928	29	43.5
1929	39	43.5
1930	65	65
1931	61	65
1932	36	65
1933	73	65
1934	94	65
1935	47	65
1936	91	65
1937	74	65
1938	64	65
1939	45	65
1940	56	56.3
1941	60	56.3
1942	55	56.3
1943	50	56.3
1944	51	56.3
1945	35	56.3
1947	70	56.3
1948	68	56.3
1949	62	56.3
1950	36	55.5
1951	29	55.5
1952	68	55.5
1953	75	55.5
1954	73	55.5
1955	78	55.5
1956	82	55.5
1957	44	55.5
1958	26	55.5
1959	44	55.5
1960	43	50.2
1961	50	50.2
1962	54	50.2
1963	60	50.2
1964	58	50.2
1965	39	50.2
1966	50	50.2
1967	38	50.2
1968	60	50.2
1969	50	50.2
1970	60	55
1971	74	55
1972	54	55
1974	39	55
1976	45	55
1977	62	55
1978	56	55
1979	50	55
1980	71	50.8
1981	40	50.8
1983	83	50.8
1984	53	50.8
1985	34	50.8
1986	29	50.8
1987	46	50.8
1988	71	50.8
1989	30	50.8
1990	32	36
1991	53	36
1992	17	36
1993	25	36
1994	33	36
1995	47	36
1996	32	36
1997	39	36
1998	41	36
1999	41	36
2000	37	42.9
2001	44	42.9
2002	56	42.9
2003	37	42.9
2004	14	42.9
2005	63	42.9
2007	67	42.9
2008	25	42.9
2015	42	50.5
2016	59	50.5
2025	2	2

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

First to last qualifying date each year at Oskaloosa
Year	First date	Last date
1893	1893-06-12	1893-10-01
1895	1895-03-29	1895-09-21
1896	1896-04-15	1896-09-02
1897	1897-05-18	1897-10-15
1898	1898-05-23	1898-09-29
1899	1899-05-16	1899-10-23
1900	1900-05-12	1900-10-04
1901	1901-04-28	1901-09-24
1902	1902-06-10	1902-08-02
1903	1903-06-29	1903-08-26
1904	1904-06-20	1904-09-28
1905	1905-06-04	1905-09-27
1906	1906-04-24	1906-09-18
1907	1907-03-21	1907-09-16
1908	1908-05-16	1908-09-25
1909	1909-05-05	1909-08-27
1910	1910-03-23	1910-10-16
1911	1911-05-09	1911-09-14
1912	1912-05-22	1912-10-05
1913	1913-04-30	1913-09-10
1914	1914-04-26	1914-08-30
1915	1915-05-13	1915-09-13
1916	1916-06-29	1916-10-08
1917	1917-05-17	1917-09-05
1918	1918-05-03	1918-10-15
1919	1919-05-28	1919-09-20
1920	1920-05-22	1920-10-10
1921	1921-05-20	1921-09-16
1922	1922-05-10	1922-10-05
1923	1923-06-01	1923-09-04
1924	1924-05-05	1924-08-30
1925	1925-04-22	1925-09-19
1926	1926-04-30	1926-09-21
1927	1927-05-23	1927-10-27
1928	1928-05-03	1928-10-10
1929	1929-04-04	1929-09-27
1930	1930-04-10	1930-10-10
1931	1931-04-08	1931-09-20
1932	1932-05-14	1932-08-30
1933	1933-06-01	1933-09-25
1934	1934-05-05	1934-09-25
1935	1935-06-13	1935-09-24
1936	1936-04-30	1936-09-22
1937	1937-05-28	1937-10-29
1938	1938-05-18	1938-10-16
1939	1939-05-16	1939-10-07
1940	1940-05-13	1940-10-26
1941	1941-05-14	1941-09-22
1942	1942-04-29	1942-10-08
1943	1943-05-29	1943-09-03
1944	1944-05-15	1944-09-17
1945	1945-06-27	1945-09-23
1947	1947-06-09	1947-10-21
1948	1948-04-18	1948-09-20
1949	1949-04-25	1949-10-07
1950	1950-05-04	1950-10-31
1951	1951-06-01	1951-10-03
1952	1952-04-28	1952-09-30
1953	1953-05-25	1953-10-20
1954	1954-04-17	1954-10-03
1955	1955-04-18	1955-09-22
1956	1956-04-27	1956-10-12
1957	1957-06-04	1957-09-01
1958	1958-05-11	1958-09-03
1959	1959-05-02	1959-09-08
1960	1960-04-22	1960-09-08
1961	1961-05-31	1961-09-10
1962	1962-05-04	1962-10-10
1963	1963-05-08	1963-10-06
1964	1964-04-16	1964-09-09
1965	1965-04-30	1965-09-09
1966	1966-05-05	1966-09-12
1967	1967-05-18	1967-10-04
1968	1968-05-02	1968-10-14
1969	1969-05-27	1969-10-04
1970	1970-04-28	1970-09-20
1971	1971-05-14	1971-10-01
1972	1972-05-19	1972-09-19
1974	1974-05-20	1974-08-27
1976	1976-06-05	1976-10-02
1977	1977-04-16	1977-08-27
1978	1978-05-25	1978-09-19
1979	1979-05-09	1979-09-12
1980	1980-04-21	1980-09-20
1981	1981-04-02	1981-09-30
1983	1983-06-09	1983-10-02
1984	1984-06-16	1984-09-24
1985	1985-04-18	1985-09-19
1986	1986-03-29	1986-09-26
1987	1987-04-20	1987-09-05
1988	1988-05-14	1988-09-22
1989	1989-04-25	1989-08-27
1990	1990-06-12	1990-10-05
1991	1991-05-13	1991-09-15
1992	1992-05-16	1992-08-10
1993	1993-06-11	1993-09-13
1994	1994-04-18	1994-09-30
1995	1995-06-07	1995-09-13
1996	1996-05-17	1996-09-05
1997	1997-05-18	1997-10-07
1998	1998-05-18	1998-09-29
1999	1999-06-06	1999-10-16
2000	2000-05-12	2000-09-19
2001	2001-05-16	2001-09-03
2002	2002-04-15	2002-10-01
2003	2003-04-15	2003-09-12
2004	2004-04-17	2004-09-15
2005	2005-06-09	2005-10-05
2007	2007-05-01	2007-10-07
2008	2008-06-06	2008-09-04
2015	2015-03-17	2015-09-18
2016	2016-05-07	2016-10-18
2025	2025-05-15	2025-06-03

Every Fixed Threshold

Fixed thresholds at Oskaloosa
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	113	94	1934	2
35 C (95 F): Days	91	47	1934	2
40 C (104 F): Days	15	17	1934	1
90 F (32.2 C): Days	112	73	1934	10
100 F (37.8 C): Days	34	29	1934	1
110 F (43.3 C): Days	2	4	1936	4
0 C (32 F): Ice days (max	113	77	1978	27
0 C (32 F): Frost days (min	108	159	1926	55
-10 C (14 F): Days with min	108	75	1893	29
-20 C (-4 F): Days with min	107	33	1963	11
-30 C (-22 F): Days with min	26	5	1905	4
20 C (68 F): Tropical nights (min	107	55	1936	19
25 C (77 F): Days with min	38	8	1934	1
10 mm (0.39 in): Days with 10 mm or more rain	63	47	2008	4
25 mm (0.98 in): Days with 25 mm or more rain	63	18	2008	2
50 mm (1.97 in): Days with 50 mm or more rain	48	6	1970	1
100 mm (3.94 in): Days with 100 mm or more rain	9	2	2007	2
10 cm (3.9 in): Days with 10 cm or more snowfall	78	9	2007	1
25 cm (9.8 in): Days with 25 cm or more snowfall	10	2	2005	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1893.

Download the Data

Data for Oskaloosa 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).

Oskaloosa Threshold Days by Year (USC00136327)

Key Facts for Oskaloosa Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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