Frederick Threshold Days by Year (USC00343353)

19 fixed thresholds counted per year at Frederick (USC00343353): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Frederick Thresholds

Frederick: days with 10 mm (0.39 in) or more of precipitation in 94 years, most in 1991 with 34.
Frederick: days with 25 mm (0.98 in) or more of precipitation in 94 years, most in 1990 with 17.
Frederick: days with a maximum temperature at or above 30 C (86 F) in 83 years, most in 1963 with 170.
Frederick: days with a maximum temperature at or above 35 C (95 F) in 83 years, most in 1954 with 114.
19 fixed thresholds have at least one qualifying day at Frederick.

Days at or above 30 C (86 F)

83 years with a qualifying day

Days per year at Frederick with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 170 in 1963.

Days at or above 30 C (86 F) per year at Frederick
Year	Days	Decade average
1910	154	133.1
1911	148	133.1
1912	129	133.1
1913	123	133.1
1914	134	133.1
1915	116	133.1
1917	142	133.1
1918	151	133.1
1919	101	133.1
1920	107	127.4
1921	136	127.4
1922	118	127.4
1923	128	127.4
1927	126	127.4
1928	141	127.4
1929	136	127.4
1930	141	140.4
1931	138	140.4
1932	118	140.4
1934	150	140.4
1935	120	140.4
1936	130	140.4
1937	144	140.4
1938	160	140.4
1939	163	140.4
1940	136	127.2
1941	116	127.2
1942	120	127.2
1943	144	127.2
1944	133	127.2
1945	129	127.2
1946	96	127.2
1947	135	127.2
1948	146	127.2
1949	117	127.2
1950	148	150.4
1951	148	150.4
1952	153	150.4
1953	148	150.4
1954	162	150.4
1955	162	150.4
1956	161	150.4
1957	129	150.4
1958	135	150.4
1959	158	150.4
1960	146	144.3
1961	137	144.3
1962	157	144.3
1963	170	144.3
1964	141	144.3
1965	145	144.3
1966	138	144.3
1967	153	144.3
1968	131	144.3
1969	125	144.3
1970	142	137.7
1971	150	137.7
1972	163	137.7
1973	127	137.7
1974	136	137.7
1975	132	137.7
1976	122	137.7
1977	145	137.7
1978	131	137.7
1979	129	137.7
1980	134	123.5
1981	129	123.5
1982	123	123.5
1983	124	123.5
1984	135	123.5
1985	122	123.5
1986	115	123.5
1987	120	123.5
1988	114	123.5
1989	119	123.5
1990	95	98.9
1991	108	98.9
1992	83	98.9
1993	101	98.9
1994	104	98.9
1995	93	98.9
1999	108	98.9
2004	97	97

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

First to last qualifying date each year at Frederick
Year	First date	Last date
1910	1910-03-02	1910-10-26
1911	1911-01-11	1911-11-11
1912	1912-03-18	1912-10-09
1913	1913-04-01	1913-10-06
1914	1914-03-25	1914-11-05
1915	1915-04-09	1915-11-07
1917	1917-02-25	1917-10-28
1918	1918-02-23	1918-10-09
1919	1919-05-12	1919-10-25
1920	1920-04-15	1920-10-14
1921	1921-03-16	1921-10-26
1922	1922-04-06	1922-10-25
1923	1923-04-07	1923-10-11
1927	1927-04-27	1927-10-26
1928	1928-03-24	1928-10-23
1929	1929-03-06	1929-10-06
1930	1930-02-23	1930-10-09
1931	1931-05-04	1931-10-25
1932	1932-03-25	1932-10-19
1934	1934-03-20	1934-11-08
1935	1935-04-14	1935-10-16
1936	1936-04-04	1936-10-20
1937	1937-04-14	1937-11-07
1938	1938-03-04	1938-10-31
1939	1939-03-14	1939-10-26
1940	1940-02-29	1940-10-25
1941	1941-04-17	1941-10-13
1942	1942-03-15	1942-10-09
1943	1943-01-23	1943-10-29
1944	1944-04-21	1944-11-01
1945	1945-03-26	1945-11-06
1946	1946-03-25	1946-09-10
1947	1947-04-30	1947-10-23
1948	1948-04-07	1948-10-16
1949	1949-04-08	1949-10-20
1950	1950-01-25	1950-10-31
1951	1951-03-06	1951-10-21
1952	1952-03-30	1952-10-26
1953	1953-03-20	1953-10-16
1954	1954-02-14	1954-12-04
1955	1955-03-03	1955-12-24
1956	1956-02-24	1956-10-12
1957	1957-04-18	1957-10-06
1958	1958-04-23	1958-10-24
1959	1959-03-23	1959-10-25
1960	1960-03-31	1960-10-11
1961	1961-03-03	1961-10-24
1962	1962-02-11	1962-10-15
1963	1963-03-18	1963-11-07
1964	1964-03-13	1964-10-21
1965	1965-04-03	1965-11-25
1966	1966-03-17	1966-10-29
1967	1967-03-02	1967-10-14
1968	1968-04-16	1968-10-30
1969	1969-04-08	1969-10-11
1970	1970-04-15	1970-10-08
1971	1971-03-13	1971-10-17
1972	1972-02-28	1972-10-18
1973	1973-05-09	1973-11-01
1974	1974-03-01	1974-10-10
1975	1975-03-20	1975-10-21
1976	1976-02-10	1976-10-04
1977	1977-03-14	1977-10-27
1978	1978-03-19	1978-10-22
1979	1979-04-16	1979-10-22
1980	1980-04-07	1980-11-09
1981	1981-02-21	1981-10-15
1982	1982-02-23	1982-11-01
1983	1983-03-03	1983-10-16
1984	1984-04-24	1984-10-09
1985	1985-04-19	1985-10-08
1986	1986-04-01	1986-10-04
1987	1987-04-17	1987-10-09
1988	1988-03-22	1988-11-10
1989	1989-03-12	1989-10-25
1990	1990-05-14	1990-10-06
1991	1991-03-05	1991-10-24
1992	1992-04-12	1992-10-14
1993	1993-04-13	1993-10-07
1994	1994-03-18	1994-10-07
1995	1995-03-20	1995-10-27
1999	1999-04-20	1999-11-17
2004	2004-03-17	2004-10-21

Every Fixed Threshold

Fixed thresholds at Frederick
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	83	170	1963	97
35 C (95 F): Days	83	114	1954	35
40 C (104 F): Days	74	46	1970	10
45 C (113 F): Days	10	3	1936	1
90 F (32.2 C): Days	83	144	1956	70
100 F (37.8 C): Days	83	81	1954	7
110 F (43.3 C): Days	28	14	1943	1
0 C (32 F): Ice days (max	76	19	1978	5
0 C (32 F): Frost days (min	76	108	1978	62
-10 C (14 F): Days with min	68	22	1979	1
-20 C (-4 F): Days with min	7	2	1930	1
20 C (68 F): Tropical nights (min	76	109	1954	66
25 C (77 F): Days with min	68	25	1952	1
10 mm (0.39 in): Days with 10 mm or more rain	94	34	1991	25
25 mm (0.98 in): Days with 25 mm or more rain	94	17	1990	10
50 mm (1.97 in): Days with 50 mm or more rain	77	6	1920	3
100 mm (3.94 in): Days with 100 mm or more rain	7	1	1922	1
10 cm (3.9 in): Days with 10 cm or more snowfall	31	3	1947	1
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1942	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1910.

Download the Data

Data for Frederick 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).

Frederick Threshold Days by Year (USC00343353)

Key Facts for Frederick Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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