Rosman Threshold Days by Year

7 fixed thresholds counted per year at Rosman (USC00317486): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Rosman Thresholds

Rosman: days with 10 mm (0.39 in) or more of precipitation in 84 years, most in 1957 with 78.
Rosman: days with 25 mm (0.98 in) or more of precipitation in 84 years, most in 1961 with 43.
Rosman: days with 50 mm (1.97 in) or more of precipitation in 84 years, most in 1964 with 16.
Rosman: days with 100 mm (3.94 in) or more of precipitation in 50 years, most in 1964 with 7.
7 fixed thresholds have at least one qualifying day at Rosman.

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

84 years with a qualifying day

Days per year at Rosman with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 78 in 1957.

Days with 10 mm (0.39 in) or more of precipitation per year at Rosman
Year	Days	Decade average
1936	57	54
1937	58	54
1938	52	54
1939	49	54
1940	49	57.6
1941	39	57.6
1942	68	57.6
1943	59	57.6
1944	57	57.6
1946	60	57.6
1947	54	57.6
1949	75	57.6
1950	52	60.5
1951	55	60.5
1952	50	60.5
1953	67	60.5
1954	53	60.5
1955	67	60.5
1956	57	60.5
1957	78	60.5
1958	55	60.5
1959	71	60.5
1960	65	59.2
1961	72	59.2
1962	55	59.2
1963	53	59.2
1964	66	59.2
1965	51	59.2
1966	64	59.2
1967	56	59.2
1968	54	59.2
1969	56	59.2
1971	73	60.6
1972	53	60.6
1973	59	60.6
1974	52	60.6
1975	72	60.6
1976	58	60.6
1977	52	60.6
1978	53	60.6
1979	73	60.6
1981	39	56.2
1982	58	56.2
1983	63	56.2
1984	63	56.2
1985	59	56.2
1986	50	56.2
1987	55	56.2
1988	48	56.2
1989	71	56.2
1990	65	63.3
1991	70	63.3
1992	68	63.3
1994	63	63.3
1995	63	63.3
1996	67	63.3
1997	57	63.3
1998	63	63.3
1999	54	63.3
2000	39	54.8
2001	43	54.8
2002	59	54.8
2003	68	54.8
2004	58	54.8
2005	66	54.8
2006	55	54.8
2007	42	54.8
2008	48	54.8
2009	70	54.8
2010	52	56.5
2011	62	56.5
2014	42	56.5
2015	60	56.5
2016	42	56.5
2017	56	56.5
2018	72	56.5
2019	66	56.5
2020	76	49
2021	51	49
2022	50	49
2023	44	49
2024	56	49
2025	39	49
2026	27	49

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

First to last qualifying date each year at Rosman
Year	First date	Last date
1936	1936-01-02	1936-12-31
1937	1937-01-02	1937-12-28
1938	1938-01-02	1938-12-27
1939	1939-01-05	1939-12-27
1940	1940-01-08	1940-12-29
1941	1941-01-02	1941-12-24
1942	1942-01-01	1942-12-30
1943	1943-01-18	1943-12-29
1944	1944-01-03	1944-12-29
1946	1946-01-06	1946-12-21
1947	1947-01-01	1947-12-25
1949	1949-01-05	1949-12-27
1950	1950-01-05	1950-12-29
1951	1951-01-04	1951-12-21
1952	1952-01-05	1952-12-31
1953	1953-01-03	1953-12-29
1954	1954-01-11	1954-12-30
1955	1955-01-11	1955-11-26
1956	1956-01-19	1956-12-24
1957	1957-01-05	1957-12-26
1958	1958-01-14	1958-12-29
1959	1959-01-01	1959-12-29
1960	1960-01-03	1960-12-12
1961	1961-01-01	1961-12-28
1962	1962-01-01	1962-12-30
1963	1963-01-11	1963-12-23
1964	1964-01-01	1964-12-27
1965	1965-01-10	1965-12-25
1966	1966-01-02	1966-12-29
1967	1967-01-08	1967-12-29
1968	1968-01-04	1968-12-28
1969	1969-01-19	1969-12-31
1971	1971-01-01	1971-12-20
1972	1972-01-04	1972-12-22
1973	1973-01-01	1973-12-30
1974	1974-01-01	1974-12-16
1975	1975-01-11	1975-12-31
1976	1976-01-01	1976-12-31
1977	1977-01-07	1977-12-25
1978	1978-01-08	1978-12-31
1979	1979-01-02	1979-12-25
1981	1981-01-21	1981-12-25
1982	1982-01-01	1982-12-29
1983	1983-01-03	1983-12-29
1984	1984-01-11	1984-12-06
1985	1985-01-02	1985-12-12
1986	1986-01-01	1986-12-24
1987	1987-01-18	1987-12-25
1988	1988-01-07	1988-12-25
1989	1989-01-01	1989-12-31
1990	1990-01-01	1990-12-31
1991	1991-01-08	1991-12-29
1992	1992-01-03	1992-12-28
1994	1994-01-04	1994-12-23
1995	1995-01-05	1995-12-19
1996	1996-01-02	1996-12-29
1997	1997-01-05	1997-12-27
1998	1998-01-06	1998-12-25
1999	1999-01-08	1999-12-15
2000	2000-01-04	2000-12-17
2001	2001-01-12	2001-12-24
2002	2002-01-07	2002-12-25
2003	2003-01-01	2003-12-30
2004	2004-01-18	2004-12-23
2005	2005-01-08	2005-12-29
2006	2006-01-03	2006-12-31
2007	2007-01-01	2007-12-31
2008	2008-01-11	2008-12-29
2009	2009-01-06	2009-12-26
2010	2010-01-17	2010-12-26
2011	2011-01-02	2011-12-27
2014	2014-01-10	2014-12-25
2015	2015-01-03	2015-12-31
2016	2016-01-10	2016-12-29
2017	2017-01-02	2017-12-24
2018	2018-01-12	2018-12-29
2019	2019-01-03	2019-12-30
2020	2020-01-03	2020-12-25
2021	2021-01-02	2021-12-30
2022	2022-01-02	2022-12-15
2023	2023-01-04	2023-12-27
2024	2024-01-06	2024-12-30
2025	2025-01-06	2025-12-19
2026	2026-01-10	2026-10-04

Every Fixed Threshold

Fixed thresholds at Rosman
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	84	78	1957	27
25 mm (0.98 in): Days with 25 mm or more rain	84	43	1961	13
50 mm (1.97 in): Days with 50 mm or more rain	84	16	1964	5
100 mm (3.94 in): Days with 100 mm or more rain	50	7	1964	2
200 mm (7.87 in): Days with 200 mm or more rain	4	2	1964	1
10 cm (3.9 in): Days with 10 cm or more snowfall	30	3	1960	1
25 cm (9.8 in): Days with 25 cm or more snowfall	4	1	1988	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1936.

Download the Data

Data for Rosman 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 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Rosman Threshold Days by Year

Key Facts for Rosman Thresholds

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

Every Fixed Threshold

Download the Data

Related