Plymouth Pwr Substn Threshold Days by Year (USC00127028)

18 fixed thresholds counted per year at Plymouth Pwr Substn (USC00127028): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Plymouth Pwr Substn Thresholds

Plymouth Pwr Substn: days with a maximum temperature at or above 30 C (86 F) in 83 years, most in 1983 with 85.
Plymouth Pwr Substn: days with a maximum temperature at or below 0 C (32 F) in 83 years, most in 1963 with 62.
Plymouth Pwr Substn: days with 10 mm (0.39 in) or more of precipitation in 83 years, most in 1921 with 45.
Plymouth Pwr Substn: days with 25 mm (0.98 in) or more of precipitation in 83 years, most in 1927 with 17.
18 fixed thresholds have at least one qualifying day at Plymouth Pwr Substn.

Days at or above 30 C (86 F)

83 years with a qualifying day

Days per year at Plymouth Pwr Substn with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 85 in 1983.

Days at or above 30 C (86 F) per year at Plymouth Pwr Substn
Year	Days	Decade average
1906	58	30.8
1907	10	30.8
1908	45	30.8
1909	10	30.8
1910	30	30.4
1911	28	30.4
1912	13	30.4
1913	41	30.4
1914	38	30.4
1915	8	30.4
1916	43	30.4
1917	19	30.4
1918	34	30.4
1919	50	30.4
1920	42	47.4
1921	80	47.4
1922	59	47.4
1923	67	47.4
1924	21	47.4
1925	79	47.4
1926	27	47.4
1927	28	47.4
1928	33	47.4
1929	38	47.4
1930	52	58.4
1931	62	58.4
1932	38	58.4
1933	77	58.4
1934	75	58.4
1935	54	58.4
1936	83	58.4
1937	53	58.4
1938	37	58.4
1939	53	58.4
1940	48	57.4
1941	69	57.4
1942	39	57.4
1943	62	57.4
1944	76	57.4
1945	45	57.4
1946	63	57.4
1947	60	57.4
1948	49	57.4
1949	63	57.4
1950	33	56
1951	39	56
1952	66	56
1953	74	56
1954	60	56
1955	75	56
1956	61	56
1957	49	56
1958	29	56
1959	74	56
1960	53	49.2
1961	52	49.2
1962	52	49.2
1963	47	49.2
1964	64	49.2
1965	31	49.2
1966	57	49.2
1967	33	49.2
1968	46	49.2
1969	57	49.2
1970	58	53.8
1971	66	53.8
1972	48	53.8
1973	49	53.8
1974	42	53.8
1975	52	53.8
1976	50	53.8
1977	65	53.8
1978	59	53.8
1979	49	53.8
1980	64	55.1
1981	35	55.1
1982	56	55.1
1983	85	55.1
1984	62	55.1
1985	56	55.1
1986	42	55.1
1987	40	55.1
1988	56	55.1

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

First to last qualifying date each year at Plymouth Pwr Substn
Year	First date	Last date
1906	1906-05-15	1906-09-18
1907	1907-06-16	1907-09-01
1908	1908-05-25	1908-09-26
1909	1909-06-21	1909-09-13
1910	1910-06-17	1910-08-30
1911	1911-05-17	1911-09-02
1912	1912-06-26	1912-09-10
1913	1913-06-06	1913-09-07
1914	1914-05-25	1914-09-21
1915	1915-04-26	1915-09-14
1916	1916-05-25	1916-09-12
1917	1917-05-18	1917-08-20
1918	1918-05-26	1918-08-26
1919	1919-05-30	1919-09-20
1920	1920-05-23	1920-10-11
1921	1921-04-05	1921-09-29
1922	1922-05-10	1922-10-06
1923	1923-05-28	1923-09-28
1924	1924-06-19	1924-09-22
1925	1925-04-23	1925-09-21
1926	1926-05-08	1926-08-30
1927	1927-06-25	1927-09-17
1928	1928-05-03	1928-10-11
1929	1929-05-29	1929-09-24
1930	1930-04-10	1930-09-22
1931	1931-05-18	1931-09-22
1932	1932-06-05	1932-10-02
1933	1933-05-23	1933-09-25
1934	1934-05-03	1934-08-18
1935	1935-04-26	1935-09-25
1936	1936-05-06	1936-09-22
1937	1937-05-30	1937-09-23
1938	1938-06-15	1938-10-10
1939	1939-05-25	1939-10-09
1940	1940-06-05	1940-09-21
1941	1941-05-20	1941-09-24
1942	1942-04-30	1942-09-14
1943	1943-05-29	1943-09-05
1944	1944-05-12	1944-09-27
1945	1945-06-14	1945-09-23
1946	1946-06-07	1946-10-07
1947	1947-05-15	1947-10-15
1948	1948-06-02	1948-09-20
1949	1949-05-03	1949-10-09
1950	1950-05-24	1950-08-27
1951	1951-05-01	1951-10-04
1952	1952-04-30	1952-09-29
1953	1953-05-09	1953-10-21
1954	1954-05-24	1954-09-27
1955	1955-05-03	1955-09-19
1956	1956-05-12	1956-10-16
1957	1957-05-01	1957-09-19
1958	1958-04-17	1958-09-05
1959	1959-05-02	1959-09-25
1960	1960-04-22	1960-09-24
1961	1961-06-05	1961-09-22
1962	1962-04-26	1962-10-15
1963	1963-05-08	1963-10-07
1964	1964-05-07	1964-09-21
1965	1965-05-08	1965-09-20
1966	1966-05-23	1966-09-03
1967	1967-05-25	1967-10-04
1968	1968-06-05	1968-09-03
1969	1969-05-04	1969-09-03
1970	1970-05-19	1970-09-22
1971	1971-05-17	1971-10-03
1972	1972-05-18	1972-09-17
1973	1973-06-01	1973-09-26
1974	1974-05-21	1974-08-27
1975	1975-05-18	1975-10-13
1976	1976-04-17	1976-09-14
1977	1977-04-17	1977-09-04
1978	1978-05-26	1978-09-20
1979	1979-05-08	1979-09-29
1980	1980-04-22	1980-09-22
1981	1981-06-03	1981-09-13
1982	1982-05-05	1982-10-06
1983	1983-06-10	1983-10-02
1984	1984-05-18	1984-09-22
1985	1985-04-19	1985-09-20
1986	1986-04-25	1986-09-29
1987	1987-05-11	1987-08-17
1988	1988-05-15	1988-08-18

Every Fixed Threshold

Fixed thresholds at Plymouth Pwr Substn
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	83	85	1983	56
35 C (95 F): Days	68	30	1936	14
40 C (104 F): Days	4	8	1936	1
90 F (32.2 C): Days	81	60	1983	34
100 F (37.8 C): Days	21	11	1933	1
0 C (32 F): Ice days (max	83	62	1963	47
0 C (32 F): Frost days (min	81	156	1937	139
-10 C (14 F): Days with min	81	63	1929	39
-20 C (-4 F): Days with min	69	24	1963	6
-30 C (-22 F): Days with min	6	1	1924	1
20 C (68 F): Tropical nights (min	81	32	1921	22
25 C (77 F): Days with min	21	5	1934	1
10 mm (0.39 in): Days with 10 mm or more rain	83	45	1921	37
25 mm (0.98 in): Days with 25 mm or more rain	83	17	1927	8
50 mm (1.97 in): Days with 50 mm or more rain	55	6	1954	3
100 mm (3.94 in): Days with 100 mm or more rain	6	2	1954	1
10 cm (3.9 in): Days with 10 cm or more snowfall	63	9	1977	1
25 cm (9.8 in): Days with 25 cm or more snowfall	8	1	1912	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1906.

Download the Data

Data for Plymouth Pwr Substn 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).

Plymouth Pwr Substn Threshold Days by Year (USC00127028)

Key Facts for Plymouth Pwr Substn Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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