Clearbrook Threshold Days by Year (USC00451484)

16 fixed thresholds counted per year at Clearbrook (USC00451484): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Clearbrook Thresholds

Clearbrook: nights with a minimum temperature at or below 0 C (32 F) in 121 years, most in 1911 with 136.
Clearbrook: days with 10 mm (0.39 in) or more of precipitation in 117 years, most in 1953 with 60.
Clearbrook: days with 25 mm (0.98 in) or more of precipitation in 117 years, most in 1910 with 19.
Clearbrook: days with a maximum temperature at or above 30 C (86 F) in 115 years, most in 1958 with 26.
16 fixed thresholds have at least one qualifying day at Clearbrook.

Days at or above 30 C (86 F)

115 years with a qualifying day

Days per year at Clearbrook with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 26 in 1958.

Days at or above 30 C (86 F) per year at Clearbrook
Year	Days	Decade average
1904	11	9.2
1905	10	9.2
1906	12	9.2
1907	7	9.2
1908	10	9.2
1909	5	9.2
1910	10	11.7
1911	11	11.7
1912	11	11.7
1913	16	11.7
1914	6	11.7
1916	11	11.7
1917	7	11.7
1918	20	11.7
1919	13	11.7
1920	10	10.3
1922	9	10.3
1923	8	10.3
1924	10	10.3
1925	11	10.3
1926	13	10.3
1927	14	10.3
1928	11	10.3
1929	7	10.3
1930	10	8.6
1931	9	8.6
1932	5	8.6
1934	9	8.6
1935	12	8.6
1936	3	8.6
1937	3	8.6
1938	13	8.6
1939	13	8.6
1940	11	8.7
1941	12	8.7
1942	15	8.7
1943	7	8.7
1944	16	8.7
1945	6	8.7
1946	8	8.7
1947	2	8.7
1948	2	8.7
1949	8	8.7
1951	12	10
1952	13	10
1953	6	10
1955	6	10
1956	10	10
1957	2	10
1958	26	10
1959	5	10
1960	8	7
1961	12	7
1962	3	7
1963	7	7
1965	8	7
1966	3	7
1967	14	7
1968	4	7
1969	4	7
1970	6	6.6
1971	11	6.6
1972	6	6.6
1973	7	6.6
1974	6	6.6
1975	4	6.6
1977	9	6.6
1978	6	6.6
1979	4	6.6
1980	1	7.4
1981	6	7.4
1982	13	7.4
1983	3	7.4
1984	5	7.4
1985	16	7.4
1986	9	7.4
1987	9	7.4
1988	10	7.4
1989	2	7.4
1990	14	7.6
1991	4	7.6
1992	9	7.6
1993	4	7.6
1994	5	7.6
1995	11	7.6
1996	14	7.6
1997	4	7.6
1998	9	7.6
1999	2	7.6
2000	1	6.8
2001	1	6.8
2002	7	6.8
2003	9	6.8
2004	15	6.8
2005	5	6.8
2006	9	6.8
2007	4	6.8
2008	9	6.8
2009	8	6.8
2010	8	10.2
2012	7	10.2
2013	4	10.2
2014	7	10.2
2015	17	10.2
2016	11	10.2
2017	13	10.2
2018	20	10.2
2019	5	10.2
2020	7	11.9
2021	17	11.9
2022	18	11.9
2023	14	11.9
2024	10	11.9
2025	9	11.9
2026	8	11.9

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

First to last qualifying date each year at Clearbrook
Year	First date	Last date
1904	1904-07-09	1904-08-13
1905	1905-04-24	1905-08-08
1906	1906-06-24	1906-08-11
1907	1907-06-25	1907-09-09
1908	1908-07-07	1908-09-04
1909	1909-06-10	1909-09-05
1910	1910-06-10	1910-09-19
1911	1911-07-12	1911-08-26
1912	1912-05-12	1912-09-13
1913	1913-07-18	1913-08-28
1914	1914-06-15	1914-08-19
1916	1916-06-16	1916-08-29
1917	1917-07-14	1917-08-31
1918	1918-07-15	1918-09-28
1919	1919-07-08	1919-09-24
1920	1920-07-05	1920-08-13
1922	1922-05-30	1922-08-26
1923	1923-06-28	1923-09-11
1924	1924-05-12	1924-08-12
1925	1925-06-24	1925-08-19
1926	1926-05-12	1926-08-24
1927	1927-06-20	1927-09-19
1928	1928-05-24	1928-09-22
1929	1929-07-13	1929-09-16
1930	1930-06-15	1930-08-28
1931	1931-06-06	1931-08-28
1932	1932-06-10	1932-08-06
1934	1934-04-22	1934-09-03
1935	1935-06-06	1935-09-08
1936	1936-05-26	1936-08-28
1937	1937-06-28	1937-09-14
1938	1938-06-06	1938-09-17
1939	1939-05-13	1939-08-22
1940	1940-06-18	1940-09-23
1941	1941-06-11	1941-08-19
1942	1942-06-29	1942-09-22
1943	1943-07-20	1943-09-10
1944	1944-05-27	1944-09-11
1945	1945-07-07	1945-08-21
1946	1946-05-03	1946-08-22
1947	1947-05-26	1947-07-17
1948	1948-06-07	1948-07-31
1949	1949-07-14	1949-09-07
1951	1951-06-28	1951-09-16
1952	1952-07-08	1952-09-22
1953	1953-07-07	1953-09-05
1955	1955-06-09	1955-09-06
1956	1956-05-18	1956-08-22
1957	1957-09-12	1957-09-13
1958	1958-05-18	1958-09-07
1959	1959-07-17	1959-07-31
1960	1960-07-06	1960-08-09
1961	1961-06-16	1961-08-19
1962	1962-07-23	1962-07-29
1963	1963-05-19	1963-09-09
1965	1965-07-24	1965-08-18
1966	1966-05-05	1966-08-21
1967	1967-06-18	1967-09-16
1968	1968-07-02	1968-07-31
1969	1969-05-23	1969-06-18
1970	1970-06-01	1970-08-22
1971	1971-07-17	1971-08-11
1972	1972-05-28	1972-09-03
1973	1973-05-14	1973-09-05
1974	1974-07-31	1974-09-24
1975	1975-07-04	1975-07-07
1977	1977-08-05	1977-08-18
1978	1978-06-03	1978-08-08
1979	1979-07-15	1979-07-18
1980	1980-08-10	1980-08-10
1981	1981-08-06	1981-08-11
1982	1982-06-17	1982-09-02
1983	1983-05-28	1983-07-30
1984	1984-07-16	1984-08-08
1985	1985-06-17	1985-08-24
1986	1986-06-13	1986-08-28
1987	1987-06-29	1987-09-07
1988	1988-07-19	1988-09-04
1989	1989-06-03	1989-06-04
1990	1990-06-21	1990-08-12
1991	1991-07-02	1991-07-24
1992	1992-05-24	1992-08-13
1993	1993-05-24	1993-08-04
1994	1994-07-20	1994-08-27
1995	1995-06-27	1995-09-24
1996	1996-07-13	1996-08-30
1997	1997-07-04	1997-08-16
1998	1998-05-01	1998-08-31
1999	1999-06-14	1999-07-09
2000	2000-06-27	2000-06-27
2001	2001-08-09	2001-08-09
2002	2002-06-13	2002-08-28
2003	2003-06-05	2003-09-03
2004	2004-06-17	2004-08-14
2005	2005-05-26	2005-08-14
2006	2006-06-24	2006-09-02
2007	2007-07-10	2007-08-15
2008	2008-05-17	2008-08-16
2009	2009-06-02	2009-09-12
2010	2010-07-07	2010-08-17
2012	2012-08-04	2012-09-08
2013	2013-05-05	2013-09-11
2014	2014-07-01	2014-09-15
2015	2015-06-26	2015-08-18
2016	2016-05-02	2016-08-26
2017	2017-06-24	2017-09-04
2018	2018-06-17	2018-08-21
2019	2019-06-12	2019-08-28
2020	2020-07-27	2020-09-11
2021	2021-06-20	2021-08-14
2022	2022-06-25	2022-09-11
2023	2023-05-13	2023-08-27
2024	2024-07-07	2024-09-06
2025	2025-06-08	2025-08-25
2026	2026-06-14	2026-08-25

Every Fixed Threshold

Fixed thresholds at Clearbrook
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	115	26	1958	8
35 C (95 F): Days	35	6	2021	6
40 C (104 F): Days	1	2	2021	2
90 F (32.2 C): Days	95	10	1958	2
100 F (37.8 C): Days	3	4	2021	4
0 C (32 F): Ice days (max	115	39	1937	7
0 C (32 F): Frost days (min	121	136	1911	30
-10 C (14 F): Days with min	78	15	1907	3
-20 C (-4 F): Days with min	2	1	1911	1
20 C (68 F): Tropical nights (min	2	1	1994	1
10 mm (0.39 in): Days with 10 mm or more rain	117	60	1953	28
25 mm (0.98 in): Days with 25 mm or more rain	117	19	1910	7
50 mm (1.97 in): Days with 50 mm or more rain	66	5	1909	1
100 mm (3.94 in): Days with 100 mm or more rain	2	1	1910	1
10 cm (3.9 in): Days with 10 cm or more snowfall	50	8	1937	1
25 cm (9.8 in): Days with 25 cm or more snowfall	5	1	1954	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1904.

Download the Data

Data for Clearbrook 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 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Clearbrook Threshold Days by Year (USC00451484)

Key Facts for Clearbrook Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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