Altoona Horseshoe Curv Threshold Days by Year (USC00360134)

17 fixed thresholds counted per year at Altoona Horseshoe Curv (USC00360134): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Altoona Horseshoe Curv Thresholds

Altoona Horseshoe Curv: days with 10 mm (0.39 in) or more of precipitation in 71 years, most in 1927 with 49.
Altoona Horseshoe Curv: days with 25 mm (0.98 in) or more of precipitation in 70 years, most in 1952 with 12.
Altoona Horseshoe Curv: days with a maximum temperature at or above 30 C (86 F) in 68 years, most in 1900 with 55.
Altoona Horseshoe Curv: days with a maximum temperature at or below 0 C (32 F) in 68 years, most in 1914 with 56.
17 fixed thresholds have at least one qualifying day at Altoona Horseshoe Curv.

Days at or above 30 C (86 F)

68 years with a qualifying day

Days per year at Altoona Horseshoe Curv with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 55 in 1900.

Days at or above 30 C (86 F) per year at Altoona Horseshoe Curv
Year	Days	Decade average
1894	51	42.3
1895	48	42.3
1896	34	42.3
1897	34	42.3
1898	49	42.3
1899	38	42.3
1900	55	28.5
1901	33	28.5
1902	27	28.5
1903	26	28.5
1904	20	28.5
1905	16	28.5
1906	27	28.5
1909	24	28.5
1913	24	22.9
1914	35	22.9
1915	18	22.9
1916	22	22.9
1917	10	22.9
1918	27	22.9
1919	24	22.9
1920	7	20.5
1921	24	20.5
1922	24	20.5
1923	20	20.5
1924	13	20.5
1925	29	20.5
1926	17	20.5
1927	16	20.5
1928	22	20.5
1929	33	20.5
1930	52	35.1
1931	41	35.1
1932	35	35.1
1933	38	35.1
1934	39	35.1
1935	17	35.1
1936	38	35.1
1937	30	35.1
1938	30	35.1
1939	31	35.1
1940	24	25.4
1941	39	25.4
1942	25	25.4
1943	39	25.4
1944	28	25.4
1945	20	25.4
1946	14	25.4
1947	14	25.4
1948	22	25.4
1949	29	25.4
1950	9	25.1
1951	20	25.1
1952	41	25.1
1953	34	25.1
1954	23	25.1
1955	32	25.1
1956	11	25.1
1957	26	25.1
1958	15	25.1
1959	40	25.1
1960	11	24.6
1961	20	24.6
1962	22	24.6
1963	18	24.6
1964	37	24.6
1965	27	24.6
1966	37	24.6

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

First to last qualifying date each year at Altoona Horseshoe Curv
Year	First date	Last date
1894	1894-06-11	1894-09-06
1895	1895-05-05	1895-09-24
1896	1896-04-18	1896-09-13
1897	1897-06-03	1897-10-17
1898	1898-05-20	1898-09-06
1899	1899-04-30	1899-09-09
1900	1900-05-08	1900-09-27
1901	1901-05-24	1901-09-07
1902	1902-04-22	1902-09-01
1903	1903-05-18	1903-09-14
1904	1904-05-25	1904-09-29
1905	1905-05-04	1905-09-19
1906	1906-05-17	1906-09-19
1909	1909-05-15	1909-09-23
1913	1913-05-04	1913-10-05
1914	1914-05-25	1914-09-23
1915	1915-04-25	1915-09-16
1916	1916-07-02	1916-10-08
1917	1917-07-24	1917-08-21
1918	1918-05-12	1918-08-25
1919	1919-05-29	1919-10-03
1920	1920-06-01	1920-09-26
1921	1921-06-03	1921-09-02
1922	1922-06-17	1922-10-05
1923	1923-05-29	1923-08-07
1924	1924-06-19	1924-09-01
1925	1925-04-24	1925-09-20
1926	1926-05-07	1926-08-29
1927	1927-05-09	1927-10-02
1928	1928-05-04	1928-09-12
1929	1929-05-30	1929-09-28
1930	1930-04-11	1930-09-26
1931	1931-05-29	1931-09-23
1932	1932-05-16	1932-09-20
1933	1933-05-20	1933-09-25
1934	1934-05-05	1934-09-04
1935	1935-06-14	1935-08-16
1936	1936-05-07	1936-09-23
1937	1937-05-22	1937-09-03
1938	1938-04-27	1938-09-07
1939	1939-05-19	1939-10-10
1940	1940-06-04	1940-09-21
1941	1941-04-20	1941-10-07
1942	1942-04-26	1942-09-19
1943	1943-05-06	1943-09-06
1944	1944-05-04	1944-09-02
1945	1945-06-14	1945-09-08
1946	1946-06-07	1946-09-09
1947	1947-05-28	1947-09-15
1948	1948-05-11	1948-09-13
1949	1949-05-04	1949-10-09
1950	1950-06-09	1950-08-28
1951	1951-05-17	1951-10-05
1952	1952-04-22	1952-09-14
1953	1953-05-11	1953-09-30
1954	1954-06-10	1954-09-06
1955	1955-05-04	1955-08-29
1956	1956-06-12	1956-09-01
1957	1957-04-27	1957-09-22
1958	1958-06-01	1958-09-06
1959	1959-05-06	1959-10-05
1960	1960-04-23	1960-09-09
1961	1961-06-12	1961-09-25
1962	1962-04-26	1962-08-31
1963	1963-05-09	1963-10-07
1964	1964-05-19	1964-09-17
1965	1965-05-03	1965-09-22
1966	1966-06-22	1966-09-03

Every Fixed Threshold

Fixed thresholds at Altoona Horseshoe Curv
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	68	55	1900	37
35 C (95 F): Days	30	10	1930	3
90 F (32.2 C): Days	66	31	1898	14
100 F (37.8 C): Days	2	2	1930	1
0 C (32 F): Ice days (max	68	56	1914	47
0 C (32 F): Frost days (min	66	164	1904	150
-10 C (14 F): Days with min	66	55	1904	30
-20 C (-4 F): Days with min	44	10	1904	1
20 C (68 F): Tropical nights (min	64	42	1894	1
25 C (77 F): Days with min	5	2	1896	1
10 mm (0.39 in): Days with 10 mm or more rain	71	49	1927	30
25 mm (0.98 in): Days with 25 mm or more rain	70	12	1952	7
50 mm (1.97 in): Days with 50 mm or more rain	41	4	1936	1
100 mm (3.94 in): Days with 100 mm or more rain	4	1	1933	1
10 cm (3.9 in): Days with 10 cm or more snowfall	41	9	1950	2
25 cm (9.8 in): Days with 25 cm or more snowfall	17	2	1925	1
50 cm (19.7 in): Days with 50 cm or more snowfall	1	1	1928	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1894.

Download the Data

Data for Altoona Horseshoe Curv 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).

Altoona Horseshoe Curv Threshold Days by Year (USC00360134)

Key Facts for Altoona Horseshoe Curv Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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