Brookwood Threshold Days by Year (USC00011143)

5 fixed thresholds counted per year at Brookwood (USC00011143): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Brookwood Thresholds

Brookwood: days with 10 mm (0.39 in) or more of precipitation in 42 years, most in 1994 with 61.
Brookwood: days with 25 mm (0.98 in) or more of precipitation in 42 years, most in 2009 with 31.
Brookwood: days with 50 mm (1.97 in) or more of precipitation in 41 years, most in 2009 with 13.
Brookwood: days with 100 mm (3.94 in) or more of precipitation in 16 years, most in 1961 with 4.
5 fixed thresholds have at least one qualifying day at Brookwood.

Days with 10 mm (0.39 in) or more of precipitation

42 years with a qualifying day

Days per year at Brookwood with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 61 in 1994.

Days with 10 mm (0.39 in) or more of precipitation per year at Brookwood
Year	Days	Decade average
1961	54	45
1962	38	45
1963	40	45
1964	53	45
1965	46	45
1966	43	45
1967	54	45
1968	34	45
1969	43	45
1970	38	46.9
1971	46	46.9
1972	44	46.9
1973	53	46.9
1974	59	46.9
1977	50	46.9
1978	40	46.9
1979	45	46.9
1980	43	42.8
1981	30	42.8
1982	53	42.8
1983	52	42.8
1984	47	42.8
1985	47	42.8
1986	39	42.8
1987	37	42.8
1988	37	42.8
1989	43	42.8
1990	41	47.4
1991	40	47.4
1992	39	47.4
1993	35	47.4
1994	61	47.4
1996	52	47.4
1997	60	47.4
1998	55	47.4
1999	44	47.4
2000	35	43.8
2001	54	43.8
2002	49	43.8
2004	41	43.8
2005	41	43.8
2009	43	43.8

For each year, a bar from the first to the last day at Brookwood meeting 10 mm (0.39 in).

First to last qualifying date each year at Brookwood
Year	First date	Last date
1961	1961-01-01	1961-12-18
1962	1962-01-01	1962-12-29
1963	1963-01-12	1963-12-23
1964	1964-01-01	1964-12-20
1965	1965-01-10	1965-12-24
1966	1966-01-03	1966-12-31
1967	1967-01-08	1967-12-28
1968	1968-01-04	1968-12-28
1969	1969-01-18	1969-12-31
1970	1970-01-06	1970-12-30
1971	1971-01-05	1971-12-20
1972	1972-01-02	1972-12-31
1973	1973-01-06	1973-12-31
1974	1974-01-07	1974-12-30
1977	1977-01-03	1977-12-30
1978	1978-01-06	1978-12-30
1979	1979-01-02	1979-12-30
1980	1980-01-04	1980-12-10
1981	1981-01-07	1981-12-30
1982	1982-01-03	1982-12-28
1983	1983-01-02	1983-12-28
1984	1984-01-10	1984-12-22
1985	1985-01-17	1985-12-13
1986	1986-01-01	1986-12-24
1987	1987-01-18	1987-12-27
1988	1988-01-01	1988-12-31
1989	1989-01-01	1989-12-30
1990	1990-01-06	1990-12-31
1991	1991-01-11	1991-12-28
1992	1992-01-19	1992-12-20
1993	1993-01-05	1993-12-06
1994	1994-01-04	1994-12-10
1996	1996-01-01	1996-12-31
1997	1997-01-04	1997-12-26
1998	1998-01-04	1998-12-27
1999	1999-01-06	1999-12-21
2000	2000-01-04	2000-12-28
2001	2001-01-07	2001-12-22
2002	2002-01-05	2002-12-31
2004	2004-02-05	2004-12-20
2005	2005-01-07	2005-12-25
2009	2009-01-04	2009-11-10

Every Fixed Threshold

Fixed thresholds at Brookwood
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
10 mm (0.39 in): Days with 10 mm or more rain	42	61	1994	43
25 mm (0.98 in): Days with 25 mm or more rain	42	31	2009	31
50 mm (1.97 in): Days with 50 mm or more rain	41	13	2009	13
100 mm (3.94 in): Days with 100 mm or more rain	16	4	1961	2
10 cm (3.9 in): Days with 10 cm or more snowfall	2	1	1962	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1961.

Download the Data

Data for Brookwood 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).

Brookwood Threshold Days by Year (USC00011143)

Key Facts for Brookwood Thresholds

Days with 10 mm (0.39 in) or more of precipitation

Every Fixed Threshold

Download the Data

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