Mt Carroll Threshold Days by Year (USC00115901)

18 fixed thresholds counted per year at Mt Carroll (USC00115901): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Mt Carroll Thresholds

Mt Carroll: days with 10 mm (0.39 in) or more of precipitation in 128 years, most in 1902 with 53.
Mt Carroll: days with 25 mm (0.98 in) or more of precipitation in 127 years, most in 2009 with 16.
Mt Carroll: days with a maximum temperature at or above 30 C (86 F) in 123 years, most in 1901 with 78.
Mt Carroll: days with a maximum temperature at or below 0 C (32 F) in 123 years, most in 1978 with 84.
18 fixed thresholds have at least one qualifying day at Mt Carroll.

Days at or above 30 C (86 F)

123 years with a qualifying day

Days per year at Mt Carroll with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 78 in 1901.

Days at or above 30 C (86 F) per year at Mt Carroll
Year	Days	Decade average
1898	45	49
1899	53	49
1900	51	40.9
1901	78	40.9
1902	23	40.9
1903	19	40.9
1905	32	40.9
1906	50	40.9
1907	26	40.9
1908	44	40.9
1909	45	40.9
1910	58	46.3
1911	56	46.3
1912	43	46.3
1913	52	46.3
1914	63	46.3
1915	16	46.3
1917	33	46.3
1918	40	46.3
1919	56	46.3
1921	78	44.8
1922	46	44.8
1923	59	44.8
1924	16	44.8
1925	55	44.8
1926	34	44.8
1927	42	44.8
1928	34	44.8
1929	39	44.8
1930	57	61.2
1931	71	61.2
1932	50	61.2
1933	69	61.2
1934	78	61.2
1935	54	61.2
1936	67	61.2
1937	52	61.2
1938	48	61.2
1939	66	61.2
1940	54	49.5
1941	57	49.5
1942	46	49.5
1943	52	49.5
1944	59	49.5
1945	36	49.5
1946	39	49.5
1947	51	49.5
1948	49	49.5
1949	52	49.5
1950	14	30.9
1951	12	30.9
1952	54	30.9
1953	49	30.9
1954	41	30.9
1955	47	30.9
1956	23	30.9
1957	21	30.9
1958	4	30.9
1959	44	30.9
1960	21	30.9
1961	21	30.9
1962	27	30.9
1963	36	30.9
1964	42	30.9
1966	44	30.9
1967	20	30.9
1968	39	30.9
1969	28	30.9
1970	46	39.4
1971	51	39.4
1974	35	39.4
1975	52	39.4
1976	33	39.4
1977	36	39.4
1978	37	39.4
1979	25	39.4
1980	41	38.7
1981	18	38.7
1982	17	38.7
1983	61	38.7
1984	35	38.7
1985	28	38.7
1986	31	38.7
1987	49	38.7
1988	71	38.7
1989	36	38.7
1990	31	39.9
1991	60	39.9
1992	20	39.9
1993	22	39.9
1994	37	39.9
1995	60	39.9
1996	31	39.9
1997	37	39.9
1998	53	39.9
1999	48	39.9
2000	37	40.8
2001	50	40.8
2002	57	40.8
2003	44	40.8
2004	22	40.8
2005	68	40.8
2006	33	40.8
2007	61	40.8
2008	21	40.8
2009	15	40.8
2010	55	47.5
2011	52	47.5
2012	71	47.5
2013	41	47.5
2014	32	47.5
2015	30	47.5
2016	60	47.5
2017	40	47.5
2018	52	47.5
2019	42	47.5
2020	59	38
2021	45	38
2022	26	38
2023	35	38
2024	31	38
2025	43	38
2026	27	38

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

First to last qualifying date each year at Mt Carroll
Year	First date	Last date
1898	1898-06-03	1898-09-04
1899	1899-06-03	1899-10-13
1900	1900-05-12	1900-10-04
1901	1901-04-29	1901-09-07
1902	1902-04-21	1902-08-04
1903	1903-05-22	1903-08-24
1905	1905-06-04	1905-09-29
1906	1906-05-16	1906-09-19
1907	1907-06-16	1907-09-19
1908	1908-05-17	1908-09-26
1909	1909-05-05	1909-09-20
1910	1910-06-15	1910-09-20
1911	1911-05-09	1911-09-14
1912	1912-05-23	1912-09-10
1913	1913-05-28	1913-09-07
1914	1914-05-10	1914-09-20
1915	1915-04-24	1915-09-13
1917	1917-05-17	1917-09-05
1918	1918-05-04	1918-08-27
1919	1919-05-27	1919-09-20
1921	1921-05-19	1921-09-05
1922	1922-05-10	1922-10-05
1923	1923-05-28	1923-09-24
1924	1924-05-05	1924-08-30
1925	1925-04-22	1925-09-19
1926	1926-04-30	1926-09-18
1927	1927-06-19	1927-09-17
1928	1928-05-03	1928-10-11
1929	1929-05-28	1929-09-04
1930	1930-04-10	1930-10-10
1931	1931-05-27	1931-09-21
1932	1932-05-14	1932-09-19
1933	1933-06-03	1933-09-25
1934	1934-05-03	1934-09-25
1935	1935-06-13	1935-09-24
1936	1936-05-06	1936-09-22
1937	1937-05-29	1937-10-01
1938	1938-05-03	1938-09-10
1939	1939-05-19	1939-10-07
1940	1940-05-13	1940-09-21
1941	1941-05-15	1941-09-22
1942	1942-04-29	1942-09-18
1943	1943-05-05	1943-09-03
1944	1944-05-15	1944-09-03
1945	1945-06-23	1945-09-09
1946	1946-06-07	1946-09-06
1947	1947-06-09	1947-09-20
1948	1948-06-01	1948-09-19
1949	1949-05-03	1949-10-08
1950	1950-05-24	1950-08-16
1951	1951-05-18	1951-08-31
1952	1952-04-28	1952-09-30
1953	1953-05-25	1953-10-02
1954	1954-06-09	1954-10-03
1955	1955-05-03	1955-09-18
1956	1956-05-22	1956-08-27
1957	1957-06-16	1957-08-31
1958	1958-08-03	1958-08-30
1959	1959-05-02	1959-09-22
1960	1960-07-21	1960-09-08
1961	1961-05-31	1961-09-10
1962	1962-05-16	1962-09-12
1963	1963-05-08	1963-10-06
1964	1964-05-18	1964-09-10
1966	1966-05-26	1966-09-02
1967	1967-05-18	1967-08-02
1968	1968-05-02	1968-09-03
1969	1969-05-27	1969-10-04
1970	1970-04-28	1970-09-20
1971	1971-05-17	1971-10-02
1974	1974-06-20	1974-08-27
1975	1975-05-18	1975-10-14
1976	1976-06-08	1976-10-02
1977	1977-04-17	1977-09-05
1978	1978-05-26	1978-09-20
1979	1979-05-09	1979-08-31
1980	1980-04-23	1980-09-21
1981	1981-06-06	1981-09-12
1982	1982-07-05	1982-10-02
1983	1983-06-12	1983-10-03
1984	1984-06-06	1984-09-25
1985	1985-04-22	1985-09-20
1986	1986-04-26	1986-09-26
1987	1987-04-21	1987-09-06
1988	1988-05-22	1988-09-19
1989	1989-05-25	1989-08-23
1990	1990-04-26	1990-10-06
1991	1991-05-12	1991-09-16
1992	1992-05-02	1992-08-26
1993	1993-06-18	1993-08-31
1994	1994-04-19	1994-10-01
1995	1995-06-07	1995-09-14
1996	1996-05-18	1996-09-08
1997	1997-06-14	1997-10-08
1998	1998-05-15	1998-09-27
1999	1999-05-29	1999-09-26
2000	2000-05-09	2000-09-19
2001	2001-05-16	2001-09-08
2002	2002-04-16	2002-10-01
2003	2003-04-15	2003-09-12
2004	2004-05-10	2004-09-15
2005	2005-06-03	2005-10-06
2006	2006-05-25	2006-10-04
2007	2007-04-30	2007-10-08
2008	2008-06-06	2008-09-03
2009	2009-06-20	2009-08-16
2010	2010-05-24	2010-10-10
2011	2011-05-11	2011-10-08
2012	2012-05-16	2012-09-13
2013	2013-05-01	2013-09-20
2014	2014-05-13	2014-09-29
2015	2015-06-05	2015-09-17
2016	2016-05-07	2016-10-18
2017	2017-05-16	2017-09-26
2018	2018-05-25	2018-10-04
2019	2019-05-17	2019-10-02
2020	2020-05-26	2020-09-03
2021	2021-05-02	2021-10-01
2022	2022-05-11	2022-09-21
2023	2023-05-08	2023-10-04
2024	2024-05-22	2024-09-22
2025	2025-05-16	2025-10-05
2026	2026-05-27	2026-10-13

Every Fixed Threshold

Fixed thresholds at Mt Carroll
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	123	78	1901	27
35 C (95 F): Days	90	31	1901	1
40 C (104 F): Days	3	5	1901	4
90 F (32.2 C): Days	122	55	1934	16
100 F (37.8 C): Days	17	15	1901	4
0 C (32 F): Ice days (max	123	84	1978	30
0 C (32 F): Frost days (min	123	216	1989	82
-10 C (14 F): Days with min	123	93	1989	27
-20 C (-4 F): Days with min	121	41	1977	6
-30 C (-22 F): Days with min	41	10	1979	5
20 C (68 F): Tropical nights (min	122	32	1949	26
25 C (77 F): Days with min	16	3	1952	1
10 mm (0.39 in): Days with 10 mm or more rain	128	53	1902	33
25 mm (0.98 in): Days with 25 mm or more rain	127	16	2009	10
50 mm (1.97 in): Days with 50 mm or more rain	98	6	2015	3
100 mm (3.94 in): Days with 100 mm or more rain	9	2	2010	2
10 cm (3.9 in): Days with 10 cm or more snowfall	103	7	2000	1
25 cm (9.8 in): Days with 25 cm or more snowfall	11	2	1918	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1898.

Download the Data

Data for Mt Carroll 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 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Mt Carroll Threshold Days by Year (USC00115901)

Key Facts for Mt Carroll Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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