Round Hill Threshold Days by Year

3 fixed thresholds counted per year at Round Hill (ASN00008115): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Round Hill Thresholds

Round Hill: days with 10 mm (0.39 in) or more of precipitation in 78 years, most in 1963 with 22.
Round Hill: days with 25 mm (0.98 in) or more of precipitation in 60 years, most in 1917 with 6.
Round Hill: days with 50 mm (1.97 in) or more of precipitation in 14 years, most in 1999 with 3.
3 fixed thresholds have at least one qualifying day at Round Hill.

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

78 years with a qualifying day

Days per year at Round Hill with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 22 in 1963.

Days with 10 mm (0.39 in) or more of precipitation per year at Round Hill
Year	Days	Decade average
1907	16	15.3
1908	14	15.3
1909	16	15.3
1910	14	12.2
1911	4	12.2
1912	9	12.2
1913	15	12.2
1914	3	12.2
1915	19	12.2
1916	9	12.2
1917	19	12.2
1918	18	12.2
1919	12	12.2
1920	14	11.9
1921	13	11.9
1922	8	11.9
1923	14	11.9
1924	10	11.9
1925	10	11.9
1926	17	11.9
1927	11	11.9
1928	8	11.9
1929	14	11.9
1930	8	11.5
1931	16	11.5
1932	18	11.5
1933	8	11.5
1934	11	11.5
1935	9	11.5
1936	9	11.5
1937	10	11.5
1938	8	11.5
1939	18	11.5
1940	8	11.1
1941	14	11.1
1942	10	11.1
1943	15	11.1
1944	8	11.1
1945	14	11.1
1949	9	11.1
1954	7	7
1961	9	13.3
1962	9	13.3
1963	22	13.3
1964	12	13.3
1965	18	13.3
1966	14	13.3
1968	15	13.3
1969	7	13.3
1970	10	11.5
1971	8	11.5
1972	6	11.5
1973	13	11.5
1974	18	11.5
1975	18	11.5
1976	8	11.5
1977	11	11.5
1978	14	11.5
1979	9	11.5
1980	4	11.5
1981	16	11.5
1982	12	11.5
1983	15	11.5
1984	11	11.5
1985	10	11.5
1986	12	11.5
1987	10	11.5
1988	14	11.5
1989	11	11.5
1990	13	13.7
1991	9	13.7
1992	18	13.7
1995	12	13.7
1996	13	13.7
1999	17	13.7
2000	11	8.7
2001	8	8.7
2002	7	8.7

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

First to last qualifying date each year at Round Hill
Year	First date	Last date
1907	1907-01-16	1907-09-08
1908	1908-04-24	1908-11-09
1909	1909-01-06	1909-10-09
1910	1910-02-20	1910-09-02
1911	1911-06-01	1911-07-25
1912	1912-05-08	1912-10-21
1913	1913-06-10	1913-12-20
1914	1914-06-25	1914-11-12
1915	1915-01-15	1915-10-10
1916	1916-01-21	1916-10-05
1917	1917-03-01	1917-10-01
1918	1918-02-17	1918-10-28
1919	1919-04-17	1919-11-03
1920	1920-03-13	1920-11-25
1921	1921-03-22	1921-12-18
1922	1922-04-29	1922-07-14
1923	1923-01-31	1923-12-16
1924	1924-05-14	1924-10-18
1925	1925-01-24	1925-09-25
1926	1926-02-05	1926-11-25
1927	1927-03-13	1927-08-24
1928	1928-04-20	1928-12-06
1929	1929-02-15	1929-10-29
1930	1930-06-07	1930-10-09
1931	1931-05-04	1931-11-03
1932	1932-03-28	1932-10-29
1933	1933-05-21	1933-10-03
1934	1934-01-01	1934-08-23
1935	1935-01-06	1935-09-10
1936	1936-01-10	1936-09-30
1937	1937-04-19	1937-09-16
1938	1938-03-15	1938-11-02
1939	1939-01-20	1939-08-26
1940	1940-05-14	1940-12-03
1941	1941-02-26	1941-09-19
1942	1942-03-13	1942-12-02
1943	1943-01-31	1943-12-08
1944	1944-05-18	1944-08-11
1945	1945-04-24	1945-11-12
1949	1949-06-04	1949-11-14
1954	1954-05-23	1954-08-20
1961	1961-01-26	1961-08-31
1962	1962-05-29	1962-08-04
1963	1963-01-27	1963-11-25
1964	1964-02-24	1964-10-09
1965	1965-03-25	1965-11-23
1966	1966-02-12	1966-10-24
1968	1968-01-27	1968-09-11
1969	1969-04-24	1969-09-12
1970	1970-02-16	1970-12-29
1971	1971-03-13	1971-10-05
1972	1972-05-31	1972-08-10
1973	1973-04-08	1973-09-24
1974	1974-02-03	1974-08-12
1975	1975-02-28	1975-10-15
1976	1976-03-11	1976-08-29
1977	1977-05-10	1977-12-26
1978	1978-01-02	1978-12-19
1979	1979-03-14	1979-11-30
1980	1980-06-20	1980-10-22
1981	1981-02-17	1981-12-18
1982	1982-01-03	1982-10-04
1983	1983-06-02	1983-12-04
1984	1984-02-22	1984-11-08
1985	1985-02-01	1985-09-22
1986	1986-01-08	1986-10-05
1987	1987-04-26	1987-10-13
1988	1988-03-24	1988-12-30
1989	1989-02-25	1989-10-02
1990	1990-01-28	1990-10-06
1991	1991-06-04	1991-12-25
1992	1992-02-08	1992-11-20
1995	1995-02-24	1995-10-18
1996	1996-02-08	1996-11-06
1999	1999-03-19	1999-12-30
2000	2000-01-07	2000-09-06
2001	2001-05-06	2001-11-19
2002	2002-01-30	2002-12-23

Every Fixed Threshold

Fixed thresholds at Round 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	78	22	1963	7
25 mm (0.98 in): Days with 25 mm or more rain	60	6	1917	1
50 mm (1.97 in): Days with 50 mm or more rain	14	3	1999	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1907.

Download the Data

Data for Round 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

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

Round Hill Threshold Days by Year

Key Facts for Round Hill Thresholds

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

Every Fixed Threshold

Download the Data

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