Holbrook Threshold Days by Year (USC00024089)

16 fixed thresholds counted per year at Holbrook (USC00024089): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Holbrook Thresholds

Holbrook: days with 10 mm (0.39 in) or more of precipitation in 102 years, most in 1987 with 19.
Holbrook: days with a maximum temperature at or above 30 C (86 F) in 91 years, most in 1942 with 141.
Holbrook: days with a maximum temperature at or above 35 C (95 F) in 91 years, most in 1910 with 66.
Holbrook: days with a maximum temperature at or above 90 F (32.2 C) in 91 years, most in 1942 with 123.
16 fixed thresholds have at least one qualifying day at Holbrook.

Days at or above 30 C (86 F)

91 years with a qualifying day

Days per year at Holbrook with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 141 in 1942.

Days at or above 30 C (86 F) per year at Holbrook
Year	Days	Decade average
1893	87	98.6
1894	89	98.6
1895	108	98.6
1896	92	98.6
1897	87	98.6
1898	107	98.6
1899	120	98.6
1904	91	96.2
1905	100	96.2
1906	106	96.2
1907	94	96.2
1908	100	96.2
1909	86	96.2
1910	139	121.5
1911	107	121.5
1912	130	121.5
1916	123	121.5
1917	111	121.5
1918	119	121.5
1921	94	107.9
1924	119	107.9
1925	113	107.9
1926	124	107.9
1927	99	107.9
1928	118	107.9
1929	88	107.9
1930	97	104.6
1931	104	104.6
1932	98	104.6
1933	110	104.6
1934	121	104.6
1935	102	104.6
1936	107	104.6
1937	103	104.6
1938	97	104.6
1939	107	104.6
1940	72	110.9
1941	95	110.9
1942	141	110.9
1943	112	110.9
1944	103	110.9
1945	109	110.9
1946	134	110.9
1947	124	110.9
1948	117	110.9
1949	102	110.9
1950	106	109.5
1951	115	109.5
1952	105	109.5
1953	125	109.5
1954	112	109.5
1955	95	109.5
1956	130	109.5
1957	98	109.5
1958	120	109.5
1959	89	109.5
1960	118	101.1
1961	95	101.1
1962	108	101.1
1963	100	101.1
1964	96	101.1
1965	95	101.1
1966	125	101.1
1967	68	101.1
1968	92	101.1
1969	114	101.1
1974	116	104
1975	91	104
1976	98	104
1977	99	104
1978	116	104
1981	102	104.7
1982	95	104.7
1983	105	104.7
1984	105	104.7
1985	101	104.7
1986	103	104.7
1987	111	104.7
1988	87	104.7
1989	133	104.7
1990	104	111
1991	118	111
1992	104	111
1993	114	111
1994	124	111
1995	104	111
1996	137	111
1997	125	111
1999	69	111
2000	117	110.5
2009	104	110.5

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

First to last qualifying date each year at Holbrook
Year	First date	Last date
1893	1893-05-17	1893-09-27
1894	1894-05-09	1894-09-25
1895	1895-05-06	1895-09-27
1896	1896-05-04	1896-09-17
1897	1897-04-18	1897-09-07
1898	1898-04-26	1898-09-28
1899	1899-05-12	1899-09-30
1904	1904-04-12	1904-10-05
1905	1905-05-16	1905-09-29
1906	1906-05-08	1906-10-16
1907	1907-03-18	1907-09-24
1908	1908-05-18	1908-09-25
1909	1909-06-03	1909-09-28
1910	1910-04-18	1910-10-11
1911	1911-05-04	1911-09-27
1912	1912-05-16	1912-10-07
1916	1916-05-02	1916-10-02
1917	1917-05-13	1917-10-05
1918	1918-05-26	1918-10-17
1921	1921-03-16	1921-09-27
1924	1924-05-12	1924-11-04
1925	1925-04-14	1925-10-03
1926	1926-02-20	1926-09-25
1927	1927-04-25	1927-09-22
1928	1928-04-27	1928-10-07
1929	1929-05-08	1929-10-07
1930	1930-05-20	1930-09-20
1931	1931-05-06	1931-10-01
1932	1932-05-17	1932-09-18
1933	1933-05-26	1933-10-01
1934	1934-05-06	1934-10-08
1935	1935-06-05	1935-10-06
1936	1936-05-03	1936-09-25
1937	1937-04-15	1937-09-27
1938	1938-05-14	1938-09-29
1939	1939-05-10	1939-09-24
1940	1940-05-02	1940-09-16
1941	1941-05-07	1941-09-20
1942	1942-05-19	1942-10-07
1943	1943-04-27	1943-09-22
1944	1944-05-13	1944-09-25
1945	1945-04-20	1945-09-20
1946	1946-04-11	1946-09-30
1947	1947-05-01	1947-10-05
1948	1948-04-16	1948-09-23
1949	1949-04-23	1949-09-29
1950	1950-04-21	1950-10-13
1951	1951-05-04	1951-09-28
1952	1952-05-03	1952-10-06
1953	1953-05-22	1953-10-11
1954	1954-04-18	1954-10-01
1955	1955-05-20	1955-10-01
1956	1956-05-03	1956-10-07
1957	1957-05-03	1957-10-01
1958	1958-05-05	1958-09-22
1959	1959-04-30	1959-10-25
1960	1960-05-09	1960-09-29
1961	1961-05-09	1961-09-28
1962	1962-04-15	1962-09-21
1963	1963-05-06	1963-10-02
1964	1964-05-12	1964-10-02
1965	1965-04-20	1965-10-12
1966	1966-05-06	1966-10-01
1967	1967-05-16	1967-09-07
1968	1968-05-28	1968-09-13
1969	1969-04-21	1969-09-30
1974	1974-05-08	1974-10-02
1975	1975-05-11	1975-10-06
1976	1976-05-14	1976-09-20
1977	1977-05-29	1977-10-04
1978	1978-05-13	1978-10-10
1981	1981-04-25	1981-09-29
1982	1982-05-23	1982-09-25
1983	1983-05-23	1983-09-22
1984	1984-05-09	1984-09-20
1985	1985-05-04	1985-09-17
1986	1986-05-03	1986-09-18
1987	1987-04-16	1987-10-12
1988	1988-05-11	1988-10-19
1989	1989-04-08	1989-10-14
1990	1990-04-15	1990-09-16
1991	1991-05-09	1991-10-19
1992	1992-04-13	1992-10-19
1993	1993-04-22	1993-10-06
1994	1994-04-17	1994-09-30
1995	1995-05-21	1995-10-19
1996	1996-04-10	1996-10-14
1997	1997-03-21	1997-10-07
1999	1999-05-21	1999-09-09
2000	2000-04-27	2000-10-02
2009	2009-05-06	2009-09-30

Every Fixed Threshold

Fixed thresholds at Holbrook
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	91	141	1942	104
35 C (95 F): Days	91	66	1910	37
40 C (104 F): Days	26	9	1990	1
90 F (32.2 C): Days	91	123	1942	73
100 F (37.8 C): Days	82	27	1995	1
0 C (32 F): Ice days (max	69	32	1898	7
0 C (32 F): Frost days (min	85	185	1917	124
-10 C (14 F): Days with min	85	72	1966	13
-20 C (-4 F): Days with min	31	14	1933	4
20 C (68 F): Tropical nights (min	54	19	1943	12
25 C (77 F): Days with min	3	3	1950	1
10 mm (0.39 in): Days with 10 mm or more rain	102	19	1987	1
25 mm (0.98 in): Days with 25 mm or more rain	46	6	1987	1
50 mm (1.97 in): Days with 50 mm or more rain	3	1	1895	1
10 cm (3.9 in): Days with 10 cm or more snowfall	38	3	1911	1
25 cm (9.8 in): Days with 25 cm or more snowfall	6	1	1895	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 Holbrook 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).

Holbrook Threshold Days by Year (USC00024089)

Key Facts for Holbrook Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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