Harrisburg Threshold Days by Year (USC00113879)

20 fixed thresholds counted per year at Harrisburg (USC00113879): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Harrisburg Thresholds

Harrisburg: days with a maximum temperature at or above 30 C (86 F) in 105 years, most in 1953 with 125.
Harrisburg: days with a maximum temperature at or above 90 F (32.2 C) in 105 years, most in 1953 with 100.
Harrisburg: days with a maximum temperature at or below 0 C (32 F) in 105 years, most in 1978 with 41.
Harrisburg: days with 10 mm (0.39 in) or more of precipitation in 105 years, most in 1950 with 57.
20 fixed thresholds have at least one qualifying day at Harrisburg.

Days at or above 30 C (86 F)

105 years with a qualifying day

Days per year at Harrisburg with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 125 in 1953.

Days at or above 30 C (86 F) per year at Harrisburg
Year	Days	Decade average
1899	79	79
1900	94	96.2
1901	109	96.2
1902	93	96.2
1903	81	96.2
1904	90	96.2
1905	102	96.2
1906	118	96.2
1907	81	96.2
1908	105	96.2
1909	89	96.2
1910	87	91
1911	110	91
1912	82	91
1913	109	91
1914	103	91
1915	83	91
1917	67	91
1918	87	91
1920	86	98.4
1921	119	98.4
1922	118	98.4
1923	83	98.4
1924	90	98.4
1925	108	98.4
1926	114	98.4
1927	86	98.4
1928	84	98.4
1929	96	98.4
1930	102	105.6
1931	109	105.6
1932	109	105.6
1933	113	105.6
1934	118	105.6
1935	95	105.6
1936	107	105.6
1937	94	105.6
1938	93	105.6
1939	116	105.6
1940	93	90
1941	120	90
1942	87	90
1943	83	90
1944	105	90
1945	60	90
1946	73	90
1947	91	90
1948	91	90
1949	97	90
1950	59	97.7
1951	86	97.7
1952	108	97.7
1953	125	97.7
1954	115	97.7
1955	105	97.7
1956	113	97.7
1957	78	97.7
1958	84	97.7
1959	104	97.7
1960	99	100.7
1961	90	100.7
1962	118	100.7
1963	125	100.7
1964	106	100.7
1965	108	100.7
1966	90	100.7
1967	78	100.7
1968	92	100.7
1969	101	100.7
1970	103	90.1
1971	91	90.1
1972	92	90.1
1973	98	90.1
1974	68	90.1
1975	90	90.1
1976	69	90.1
1977	111	90.1
1978	98	90.1
1979	81	90.1
1980	105	88.1
1981	75	88.1
1982	72	88.1
1983	98	88.1
1984	77	88.1
1985	81	88.1
1986	96	88.1
1987	101	88.1
1991	112	70.7
1992	33	70.7
1993	70	70.7
1994	68	70.7
1995	79	70.7
1996	58	70.7
1997	56	70.7
1998	79	70.7
1999	81	70.7
2000	68	86.7
2001	83	86.7
2007	109	86.7
2021	79	73.3
2022	90	73.3
2023	70	73.3
2024	81	73.3
2025	60	73.3
2026	60	73.3

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

First to last qualifying date each year at Harrisburg
Year	First date	Last date
1899	1899-04-28	1899-10-13
1900	1900-05-13	1900-10-05
1901	1901-04-28	1901-10-23
1902	1902-05-02	1902-10-25
1903	1903-05-16	1903-10-03
1904	1904-05-21	1904-09-29
1905	1905-04-09	1905-10-08
1906	1906-04-12	1906-09-23
1907	1907-03-21	1907-10-01
1908	1908-04-20	1908-10-20
1909	1909-05-05	1909-11-05
1910	1910-03-23	1910-10-19
1911	1911-05-08	1911-10-06
1912	1912-04-15	1912-10-11
1913	1913-04-18	1913-10-10
1914	1914-05-11	1914-10-06
1915	1915-04-08	1915-10-03
1917	1917-04-23	1917-10-17
1918	1918-05-09	1918-10-06
1920	1920-05-22	1920-10-23
1921	1921-05-18	1921-09-28
1922	1922-05-08	1922-10-06
1923	1923-04-22	1923-09-29
1924	1924-04-15	1924-10-20
1925	1925-04-08	1925-10-01
1926	1926-05-01	1926-10-04
1927	1927-05-08	1927-10-29
1928	1928-05-02	1928-10-14
1929	1929-03-24	1929-09-29
1930	1930-04-10	1930-10-13
1931	1931-04-16	1931-10-07
1932	1932-05-04	1932-09-18
1933	1933-05-09	1933-10-31
1934	1934-04-02	1934-10-24
1935	1935-04-25	1935-10-16
1936	1936-04-14	1936-10-19
1937	1937-04-17	1937-10-05
1938	1938-04-25	1938-10-17
1939	1939-03-24	1939-10-23
1940	1940-04-01	1940-10-26
1941	1941-04-12	1941-10-21
1942	1942-04-29	1942-09-19
1943	1943-05-05	1943-09-30
1944	1944-05-12	1944-10-06
1945	1945-05-14	1945-09-28
1946	1946-04-21	1946-10-06
1947	1947-05-15	1947-10-24
1948	1948-04-25	1948-09-21
1949	1949-05-02	1949-10-11
1950	1950-05-17	1950-10-31
1951	1951-04-28	1951-10-05
1952	1952-05-01	1952-10-01
1953	1953-04-09	1953-10-22
1954	1954-04-05	1954-10-11
1955	1955-04-16	1955-09-30
1956	1956-04-27	1956-10-17
1957	1957-04-19	1957-09-26
1958	1958-05-14	1958-09-26
1959	1959-04-07	1959-10-04
1960	1960-04-22	1960-10-02
1961	1961-05-31	1961-10-13
1962	1962-04-25	1962-10-12
1963	1963-04-01	1963-10-26
1964	1964-05-05	1964-09-22
1965	1965-04-22	1965-10-17
1966	1966-05-07	1966-09-12
1967	1967-04-05	1967-10-05
1968	1968-05-01	1968-10-15
1969	1969-04-16	1969-10-04
1970	1970-04-28	1970-09-25
1971	1971-04-17	1971-10-03
1972	1972-05-18	1972-09-20
1973	1973-05-26	1973-10-11
1974	1974-05-18	1974-09-12
1975	1975-05-18	1975-10-13
1976	1976-04-23	1976-09-26
1977	1977-04-15	1977-10-01
1978	1978-04-09	1978-09-20
1979	1979-05-07	1979-10-21
1980	1980-04-22	1980-10-10
1981	1981-04-28	1981-10-06
1982	1982-05-05	1982-10-06
1983	1983-06-05	1983-10-03
1984	1984-05-25	1984-09-22
1985	1985-05-12	1985-10-13
1986	1986-04-25	1986-10-04
1987	1987-04-20	1987-09-28
1991	1991-05-15	1991-10-05
1992	1992-04-15	1992-09-18
1993	1993-05-08	1993-09-15
1994	1994-05-12	1994-09-16
1995	1995-04-11	1995-09-15
1996	1996-05-18	1996-09-12
1997	1997-05-19	1997-10-08
1998	1998-05-14	1998-10-06
1999	1999-06-05	1999-09-29
2000	2000-05-12	2000-10-04
2001	2001-04-06	2001-09-24
2007	2007-04-25	2007-10-18
2021	2021-05-23	2021-10-15
2022	2022-05-11	2022-09-25
2023	2023-05-15	2023-10-04
2024	2024-04-16	2024-10-06
2025	2025-07-01	2025-10-03
2026	2026-03-23	2026-08-31

Every Fixed Threshold

Fixed thresholds at Harrisburg
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	105	125	1953	60
35 C (95 F): Days	104	70	1936	7
40 C (104 F): Days	26	25	1936	1
45 C (113 F): Days	1	1	1936	1
90 F (32.2 C): Days	105	100	1953	29
100 F (37.8 C): Days	67	46	1936	1
110 F (43.3 C): Days	4	4	1930	4
0 C (32 F): Ice days (max	105	41	1978	18
0 C (32 F): Frost days (min	102	118	1960	56
-10 C (14 F): Days with min	100	36	1963	14
-20 C (-4 F): Days with min	44	7	1899	3
-30 C (-22 F): Days with min	3	1	1899	1
20 C (68 F): Tropical nights (min	102	70	1913	46
25 C (77 F): Days with min	60	14	1936	1
10 mm (0.39 in): Days with 10 mm or more rain	105	57	1950	17
25 mm (0.98 in): Days with 25 mm or more rain	105	28	1950	7
50 mm (1.97 in): Days with 50 mm or more rain	95	7	1945	3
100 mm (3.94 in): Days with 100 mm or more rain	19	2	1910	1
10 cm (3.9 in): Days with 10 cm or more snowfall	57	6	1978	1
25 cm (9.8 in): Days with 25 cm or more snowfall	9	1	1910	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1899.

Download the Data

Data for Harrisburg 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 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Harrisburg Threshold Days by Year (USC00113879)

Key Facts for Harrisburg Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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