Ripogenus Dam Threshold Days by Year (USC00177174)

17 fixed thresholds counted per year at Ripogenus Dam (USC00177174): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Ripogenus Dam Thresholds

Ripogenus Dam: days with a maximum temperature at or below 0 C (32 F) in 67 years, most in 1978 with 106.
Ripogenus Dam: days with a maximum temperature at or above 30 C (86 F) in 66 years, most in 1937 with 27.
Ripogenus Dam: nights with a minimum temperature at or below 0 C (32 F) in 62 years, most in 1992 with 217.
Ripogenus Dam: nights with a minimum temperature at or below -10 C (14 F) in 62 years, most in 1943 with 117.
17 fixed thresholds have at least one qualifying day at Ripogenus Dam.

Days at or above 30 C (86 F)

66 years with a qualifying day

Days per year at Ripogenus Dam with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 27 in 1937.

Days at or above 30 C (86 F) per year at Ripogenus Dam
Year	Days	Decade average
1927	1	2.7
1928	4	2.7
1929	3	2.7
1930	7	8.1
1931	6	8.1
1932	4	8.1
1933	5	8.1
1934	1	8.1
1935	12	8.1
1936	2	8.1
1937	27	8.1
1938	8	8.1
1939	9	8.1
1940	5	13.3
1941	11	13.3
1942	12	13.3
1943	8	13.3
1944	20	13.3
1945	9	13.3
1946	10	13.3
1947	17	13.3
1948	15	13.3
1949	26	13.3
1950	5	8.7
1951	6	8.7
1952	24	8.7
1953	19	8.7
1954	1	8.7
1955	13	8.7
1956	2	8.7
1957	4	8.7
1958	2	8.7
1959	11	8.7
1960	11	5.5
1961	5	5.5
1962	2	5.5
1963	15	5.5
1964	5	5.5
1965	4	5.5
1966	1	5.5
1967	3	5.5
1968	6	5.5
1969	3	5.5
1970	17	7.3
1971	5	7.3
1972	3	7.3
1973	4	7.3
1974	2	7.3
1975	12	7.3
1976	7	7.3
1977	12	7.3
1978	7	7.3
1979	4	7.3
1980	1	4.5
1981	1	4.5
1982	4	4.5
1985	1	4.5
1986	1	4.5
1987	7	4.5
1988	12	4.5
1989	9	4.5
1990	6	7.2
1991	9	7.2
1992	3	7.2
1993	10	7.2
1994	8	7.2

For each year, a bar from the first to the last day at Ripogenus Dam meeting 30 C (86 F).

First to last qualifying date each year at Ripogenus Dam
Year	First date	Last date
1927	1927-07-12	1927-07-12
1928	1928-08-15	1928-08-18
1929	1929-05-30	1929-07-29
1930	1930-06-06	1930-07-21
1931	1931-05-21	1931-09-14
1932	1932-06-20	1932-08-27
1933	1933-06-29	1933-08-24
1934	1934-09-27	1934-09-27
1935	1935-07-12	1935-08-22
1936	1936-06-21	1936-07-10
1937	1937-06-01	1937-09-04
1938	1938-06-22	1938-08-17
1939	1939-07-05	1939-09-17
1940	1940-07-08	1940-08-19
1941	1941-06-21	1941-07-25
1942	1942-06-12	1942-09-19
1943	1943-06-25	1943-07-15
1944	1944-05-04	1944-08-16
1945	1945-06-29	1945-09-07
1946	1946-06-24	1946-08-09
1947	1947-06-23	1947-09-11
1948	1948-07-01	1948-09-14
1949	1949-06-04	1949-08-28
1950	1950-05-27	1950-08-25
1951	1951-05-21	1951-09-14
1952	1952-06-17	1952-08-30
1953	1953-06-20	1953-09-04
1954	1954-06-23	1954-06-23
1955	1955-06-19	1955-08-21
1956	1956-06-15	1956-06-16
1957	1957-06-16	1957-07-21
1958	1958-08-04	1958-08-07
1959	1959-05-28	1959-09-02
1960	1960-05-28	1960-09-10
1961	1961-06-13	1961-07-25
1962	1962-06-16	1962-07-01
1963	1963-06-03	1963-07-30
1964	1964-05-25	1964-08-30
1965	1965-06-29	1965-09-24
1966	1966-05-25	1966-05-25
1967	1967-06-04	1967-06-06
1968	1968-07-10	1968-07-20
1969	1969-06-14	1969-07-17
1970	1970-06-03	1970-08-17
1971	1971-06-19	1971-07-06
1972	1972-05-29	1972-07-16
1973	1973-07-09	1973-08-10
1974	1974-05-16	1974-07-15
1975	1975-06-24	1975-08-12
1976	1976-06-07	1976-08-23
1977	1977-05-23	1977-08-30
1978	1978-05-28	1978-08-18
1979	1979-06-16	1979-08-05
1980	1980-08-02	1980-08-02
1981	1981-07-09	1981-07-09
1982	1982-07-08	1982-07-19
1985	1985-07-06	1985-07-06
1986	1986-07-26	1986-07-26
1987	1987-07-08	1987-08-18
1988	1988-06-15	1988-08-12
1989	1989-06-22	1989-07-28
1990	1990-07-16	1990-08-28
1991	1991-06-19	1991-08-31
1992	1992-05-22	1992-05-24
1993	1993-06-15	1993-09-15
1994	1994-05-23	1994-07-25

Every Fixed Threshold

Fixed thresholds at Ripogenus Dam
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	66	27	1937	8
35 C (95 F): Days	9	3	1935	1
90 F (32.2 C): Days	43	13	1937	4
0 C (32 F): Ice days (max	67	106	1978	86
0 C (32 F): Frost days (min	62	217	1992	210
-10 C (14 F): Days with min	62	117	1943	103
-20 C (-4 F): Days with min	62	62	1989	58
-30 C (-22 F): Days with min	46	17	1994	17
-40 C (-40 F): Days with min	1	1	1934	1
20 C (68 F): Tropical nights (min	22	3	1943	2
10 mm (0.39 in): Days with 10 mm or more rain	61	49	1990	34
25 mm (0.98 in): Days with 25 mm or more rain	60	13	1938	4
50 mm (1.97 in): Days with 50 mm or more rain	34	3	1943	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1981	1
10 cm (3.9 in): Days with 10 cm or more snowfall	43	18	1971	9
25 cm (9.8 in): Days with 25 cm or more snowfall	31	5	1977	3
50 cm (19.7 in): Days with 50 cm or more snowfall	6	2	1952	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1927.

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Data for Ripogenus Dam 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).

Ripogenus Dam Threshold Days by Year (USC00177174)

Key Facts for Ripogenus Dam Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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