Grover Hill Threshold Days by Year

6 fixed thresholds counted per year at Grover Hill (USC00333421): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Grover Hill Thresholds

Grover Hill: days with 10 mm (0.39 in) or more of precipitation in 61 years, most in 2011 with 52.
Grover Hill: days with 25 mm (0.98 in) or more of precipitation in 61 years, most in 2007 with 16.
Grover Hill: days with 50 mm (1.97 in) or more of precipitation in 39 years, most in 1990 with 5.
Grover Hill: days with 10 cm (3.9 in) or more of snowfall in 25 years, most in 2014 with 7.
6 fixed thresholds have at least one qualifying day at Grover Hill.

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

61 years with a qualifying day

Days per year at Grover Hill with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 52 in 2011.

Days with 10 mm (0.39 in) or more of precipitation per year at Grover Hill
Year	Days	Decade average
1956	29	31
1957	35	31
1958	27	31
1959	33	31
1960	19	26
1961	35	26
1962	20	26
1963	18	26
1964	27	26
1965	30	26
1966	29	26
1967	27	26
1968	27	26
1969	28	26
1970	27	30.6
1971	26	30.6
1972	35	30.6
1973	31	30.6
1974	27	30.6
1975	32	30.6
1977	33	30.6
1979	34	30.6
1980	35	33.3
1982	33	33.3
1983	30	33.3
1984	31	33.3
1985	40	33.3
1986	44	33.3
1987	29	33.3
1988	28	33.3
1989	30	33.3
1990	40	31.7
1991	26	31.7
1992	35	31.7
1993	35	31.7
1994	33	31.7
1995	23	31.7
1996	35	31.7
1997	34	31.7
1998	28	31.7
1999	28	31.7
2000	33	34.9
2001	39	34.9
2002	31	34.9
2003	36	34.9
2004	43	34.9
2005	28	34.9
2006	37	34.9
2007	33	34.9
2008	40	34.9
2009	29	34.9
2010	35	36.5
2011	52	36.5
2012	27	36.5
2013	29	36.5
2014	32	36.5
2015	39	36.5
2016	33	36.5
2017	33	36.5
2018	46	36.5
2019	39	36.5

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

First to last qualifying date each year at Grover Hill
Year	First date	Last date
1956	1956-01-30	1956-12-09
1957	1957-01-10	1957-12-26
1958	1958-01-22	1958-11-26
1959	1959-01-01	1959-12-29
1960	1960-01-12	1960-12-21
1961	1961-02-18	1961-11-16
1962	1962-01-15	1962-11-17
1963	1963-03-05	1963-11-23
1964	1964-01-09	1964-12-25
1965	1965-01-02	1965-12-25
1966	1966-01-01	1966-12-10
1967	1967-01-27	1967-12-22
1968	1968-01-28	1968-12-28
1969	1969-01-18	1969-12-31
1970	1970-03-04	1970-11-30
1971	1971-01-04	1971-12-30
1972	1972-03-02	1972-12-13
1973	1973-01-04	1973-12-27
1974	1974-01-19	1974-12-01
1975	1975-01-09	1975-12-26
1977	1977-01-10	1977-12-18
1979	1979-01-01	1979-12-24
1980	1980-01-12	1980-12-30
1982	1982-01-23	1982-12-29
1983	1983-01-24	1983-11-28
1984	1984-01-01	1984-12-30
1985	1985-01-01	1985-12-14
1986	1986-01-19	1986-12-25
1987	1987-01-10	1987-12-29
1988	1988-01-18	1988-12-28
1989	1989-01-05	1989-12-31
1990	1990-01-04	1990-12-30
1991	1991-01-12	1991-12-03
1992	1992-01-14	1992-12-31
1993	1993-01-04	1993-12-21
1994	1994-01-26	1994-12-17
1995	1995-01-20	1995-12-19
1996	1996-01-03	1996-12-17
1997	1997-01-05	1997-12-25
1998	1998-01-04	1998-11-25
1999	1999-01-03	1999-12-14
2000	2000-01-04	2000-12-17
2001	2001-01-30	2001-12-17
2002	2002-01-30	2002-12-25
2003	2003-02-01	2003-12-23
2004	2004-01-04	2004-12-23
2005	2005-01-03	2005-12-29
2006	2006-01-17	2006-12-26
2007	2007-01-01	2007-12-17
2008	2008-01-08	2008-12-27
2009	2009-02-11	2009-12-25
2010	2010-02-06	2010-12-13
2011	2011-01-01	2011-12-28
2012	2012-01-17	2012-12-21
2013	2013-01-11	2013-12-14
2014	2014-01-06	2014-12-17
2015	2015-01-04	2015-12-29
2016	2016-01-09	2016-12-27
2017	2017-01-03	2017-11-19
2018	2018-02-16	2018-12-21
2019	2019-01-01	2019-12-29

Every Fixed Threshold

Fixed thresholds at Grover Hill
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	61	52	2011	39
25 mm (0.98 in): Days with 25 mm or more rain	61	16	2007	14
50 mm (1.97 in): Days with 50 mm or more rain	39	5	1990	1
100 mm (3.94 in): Days with 100 mm or more rain	2	1	2007	1
10 cm (3.9 in): Days with 10 cm or more snowfall	25	7	2014	2
25 cm (9.8 in): Days with 25 cm or more snowfall	5	2	1982	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1956.

Download the Data

Data for Grover Hill 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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Grover Hill Threshold Days by Year

Key Facts for Grover Hill Thresholds

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

Every Fixed Threshold

Download the Data

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