Round Hill Threshold Days by Year (ASN00074098)

3 fixed thresholds counted per year at Round Hill (ASN00074098): 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 67 years, most in 1939 with 33.
Round Hill: days with 25 mm (0.98 in) or more of precipitation in 65 years, most in 1931 with 11.
Round Hill: days with 50 mm (1.97 in) or more of precipitation in 25 years, most in 1891 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

67 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 33 in 1939.

Days with 10 mm (0.39 in) or more of precipitation per year at Round Hill
Year	Days	Decade average
1880	16	21.1
1881	16	21.1
1882	28	21.1
1883	17	21.1
1885	19	21.1
1886	21	21.1
1887	28	21.1
1888	14	21.1
1889	31	21.1
1890	21	20.4
1891	25	20.4
1892	22	20.4
1893	24	20.4
1894	31	20.4
1895	16	20.4
1896	16	20.4
1897	14	20.4
1898	17	20.4
1899	18	20.4
1900	22	18.3
1901	20	18.3
1902	10	18.3
1903	15	18.3
1904	18	18.3
1905	19	18.3
1906	24	18.3
1908	16	18.3
1909	21	18.3
1910	23	18.9
1911	23	18.9
1912	13	18.9
1913	13	18.9
1914	8	18.9
1915	24	18.9
1916	32	18.9
1917	30	18.9
1918	13	18.9
1919	10	18.9
1920	21	18.5
1921	23	18.5
1922	13	18.5
1923	16	18.5
1924	25	18.5
1925	19	18.5
1926	22	18.5
1927	9	18.5
1928	25	18.5
1929	12	18.5
1930	19	22.9
1931	30	22.9
1932	24	22.9
1933	24	22.9
1934	25	22.9
1935	23	22.9
1936	19	22.9
1937	18	22.9
1938	14	22.9
1939	33	22.9
1940	9	15.3
1941	15	15.3
1942	18	15.3
1943	17	15.3
1944	9	15.3
1945	15	15.3
1946	19	15.3
1947	22	15.3
1948	14	15.3

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
1880	1880-01-08	1880-12-03
1881	1881-02-02	1881-12-08
1882	1882-01-11	1882-12-06
1883	1883-02-09	1883-11-13
1885	1885-01-25	1885-12-23
1886	1886-01-08	1886-12-04
1887	1887-01-14	1887-12-30
1888	1888-01-03	1888-12-30
1889	1889-01-01	1889-12-19
1890	1890-02-12	1890-12-28
1891	1891-01-05	1891-11-20
1892	1892-01-12	1892-11-10
1893	1893-03-04	1893-12-29
1894	1894-01-27	1894-12-29
1895	1895-01-05	1895-12-11
1896	1896-01-14	1896-11-19
1897	1897-01-10	1897-12-19
1898	1898-02-12	1898-12-24
1899	1899-01-19	1899-11-07
1900	1900-03-02	1900-11-18
1901	1901-03-14	1901-11-15
1902	1902-01-05	1902-12-19
1903	1903-01-07	1903-12-24
1904	1904-01-02	1904-12-18
1905	1905-01-27	1905-10-31
1906	1906-02-23	1906-12-18
1908	1908-02-01	1908-11-27
1909	1909-01-20	1909-11-21
1910	1910-01-11	1910-12-01
1911	1911-01-14	1911-12-26
1912	1912-02-25	1912-12-03
1913	1913-01-03	1913-12-31
1914	1914-01-27	1914-12-15
1915	1915-02-20	1915-12-28
1916	1916-01-29	1916-12-09
1917	1917-01-03	1917-12-12
1918	1918-01-11	1918-12-25
1919	1919-02-19	1919-12-28
1920	1920-04-04	1920-12-28
1921	1921-01-03	1921-12-23
1922	1922-01-13	1922-12-31
1923	1923-05-10	1923-12-27
1924	1924-01-03	1924-12-15
1925	1925-01-13	1925-11-19
1926	1926-03-21	1926-12-18
1927	1927-01-06	1927-12-15
1928	1928-01-19	1928-12-12
1929	1929-02-15	1929-12-27
1930	1930-01-24	1930-12-25
1931	1931-01-02	1931-11-16
1932	1932-02-06	1932-10-13
1933	1933-01-22	1933-12-15
1934	1934-01-06	1934-12-01
1935	1935-01-06	1935-12-26
1936	1936-01-04	1936-12-21
1937	1937-01-19	1937-12-29
1938	1938-01-03	1938-10-31
1939	1939-02-17	1939-11-21
1940	1940-02-17	1940-12-28
1941	1941-01-03	1941-11-06
1942	1942-02-14	1942-11-22
1943	1943-01-03	1943-12-18
1944	1944-04-09	1944-12-13
1945	1945-01-31	1945-12-27
1946	1946-01-19	1946-12-28
1947	1947-02-19	1947-12-25
1948	1948-01-01	1948-12-29

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	67	33	1939	14
25 mm (0.98 in): Days with 25 mm or more rain	65	11	1931	5
50 mm (1.97 in): Days with 50 mm or more rain	25	3	1891	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1880.

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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

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

Round Hill Threshold Days by Year (ASN00074098)

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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