Rocklands Threshold Days by Year

3 fixed thresholds counted per year at Rocklands (SF003242020): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Rocklands Thresholds

Rocklands: days with 10 mm (0.39 in) or more of precipitation in 68 years, most in 1974 with 29.
Rocklands: days with 25 mm (0.98 in) or more of precipitation in 63 years, most in 1974 with 13.
Rocklands: days with 50 mm (1.97 in) or more of precipitation in 27 years, most in 1988 with 3.
3 fixed thresholds have at least one qualifying day at Rocklands.

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

68 years with a qualifying day

Days per year at Rocklands with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 29 in 1974.

Days with 10 mm (0.39 in) or more of precipitation per year at Rocklands
Year	Days	Decade average
1930	9	12.4
1931	15	12.4
1932	8	12.4
1933	6	12.4
1934	24	12.4
1935	12	12.4
1936	13	12.4
1937	13	12.4
1938	11	12.4
1939	13	12.4
1940	10	11.9
1941	8	11.9
1942	14	11.9
1943	26	11.9
1944	9	11.9
1945	6	11.9
1946	14	11.9
1947	11	11.9
1948	15	11.9
1949	6	11.9
1950	26	15.5
1951	16	15.5
1952	13	15.5
1953	9	15.5
1954	13	15.5
1955	25	15.5
1956	16	15.5
1957	13	15.5
1958	9	15.5
1959	15	15.5
1960	13	12.3
1961	14	12.3
1962	13	12.3
1963	14	12.3
1964	10	12.3
1965	8	12.3
1966	11	12.3
1967	14	12.3
1968	15	12.3
1969	11	12.3
1970	16	17.6
1971	16	17.6
1972	8	17.6
1973	12	17.6
1974	29	17.6
1975	23	17.6
1976	22	17.6
1977	18	17.6
1978	17	17.6
1979	15	17.6
1980	13	15.6
1981	19	15.6
1982	17	15.6
1983	13	15.6
1984	11	15.6
1985	12	15.6
1986	18	15.6
1987	14	15.6
1988	26	15.6
1989	13	15.6
1990	8	10.4
1991	11	10.4
1992	1	10.4
1993	14	10.4
1994	9	10.4
1995	14	10.4
1996	11	10.4
1997	15	10.4

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

First to last qualifying date each year at Rocklands
Year	First date	Last date
1930	1930-01-16	1930-12-23
1931	1931-01-02	1931-11-11
1932	1932-02-05	1932-12-21
1933	1933-01-02	1933-12-26
1934	1934-01-01	1934-12-25
1935	1935-01-12	1935-12-14
1936	1936-01-08	1936-11-26
1937	1937-01-15	1937-12-23
1938	1938-01-18	1938-12-09
1939	1939-01-30	1939-12-11
1940	1940-01-08	1940-12-21
1941	1941-01-08	1941-10-26
1942	1942-01-02	1942-12-20
1943	1943-01-10	1943-12-31
1944	1944-01-01	1944-10-25
1945	1945-01-06	1945-12-05
1946	1946-01-16	1946-12-14
1947	1947-01-13	1947-12-26
1948	1948-01-24	1948-12-16
1949	1949-01-28	1949-12-29
1950	1950-01-05	1950-12-31
1951	1951-01-01	1951-12-16
1952	1952-01-15	1952-12-15
1953	1953-04-03	1953-12-12
1954	1954-02-13	1954-12-13
1955	1955-01-18	1955-12-18
1956	1956-01-05	1956-12-15
1957	1957-01-23	1957-12-11
1958	1958-03-13	1958-12-31
1959	1959-01-18	1959-12-10
1960	1960-01-21	1960-12-28
1961	1961-01-11	1961-12-11
1962	1962-01-17	1962-12-26
1963	1963-01-22	1963-12-08
1964	1964-02-11	1964-12-27
1965	1965-01-04	1965-11-27
1966	1966-01-19	1966-12-28
1967	1967-01-12	1967-12-04
1968	1968-01-08	1968-12-01
1969	1969-02-26	1969-12-27
1970	1970-01-17	1970-12-24
1971	1971-01-06	1971-12-18
1972	1972-03-08	1972-11-23
1973	1973-01-25	1973-12-22
1974	1974-01-03	1974-11-12
1975	1975-01-14	1975-12-27
1976	1976-01-03	1976-12-24
1977	1977-01-21	1977-12-19
1978	1978-01-23	1978-11-28
1979	1979-01-10	1979-11-10
1980	1980-01-10	1980-12-24
1981	1981-01-10	1981-12-21
1982	1982-01-09	1982-12-04
1983	1983-01-14	1983-12-27
1984	1984-03-04	1984-12-01
1985	1985-02-16	1985-12-14
1986	1986-01-02	1986-12-30
1987	1987-01-10	1987-12-17
1988	1988-01-11	1988-12-31
1989	1989-01-04	1989-12-28
1990	1990-01-14	1990-12-04
1991	1991-01-07	1991-12-31
1992	1992-11-07	1992-11-07
1993	1993-01-26	1993-12-28
1994	1994-01-11	1994-12-04
1995	1995-01-10	1995-12-15
1996	1996-01-18	1996-12-28
1997	1997-01-06	1997-10-13

Every Fixed Threshold

Fixed thresholds at Rocklands
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	68	29	1974	15
25 mm (0.98 in): Days with 25 mm or more rain	63	13	1974	3
50 mm (1.97 in): Days with 50 mm or more rain	27	3	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 1930.

Download the Data

Data for Rocklands 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).

Rocklands Threshold Days by Year

Key Facts for Rocklands Thresholds

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

Every Fixed Threshold

Download the Data

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