Palmetto Threshold Days by Year (USC00406950)

17 fixed thresholds counted per year at Palmetto (USC00406950): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Palmetto Thresholds

Palmetto: days with 10 mm (0.39 in) or more of precipitation in 77 years, most in 1897 with 58.
Palmetto: days with 25 mm (0.98 in) or more of precipitation in 77 years, most in 1912 with 23.
Palmetto: days with a maximum temperature at or above 30 C (86 F) in 73 years, most in 1925 with 122.
Palmetto: days with a maximum temperature at or above 90 F (32.2 C) in 73 years, most in 1925 with 99.
17 fixed thresholds have at least one qualifying day at Palmetto.

Days at or above 30 C (86 F)

73 years with a qualifying day

Days per year at Palmetto with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 122 in 1925.

Days at or above 30 C (86 F) per year at Palmetto
Year	Days	Decade average
1896	82	98
1897	85	98
1898	111	98
1899	114	98
1900	97	87.3
1901	67	87.3
1902	100	87.3
1904	77	87.3
1907	88	87.3
1908	102	87.3
1909	80	87.3
1910	96	86.5
1911	112	86.5
1912	68	86.5
1913	99	86.5
1914	103	86.5
1915	79	86.5
1916	74	86.5
1917	61	86.5
1918	78	86.5
1919	95	86.5
1920	79	90
1921	117	90
1922	108	90
1923	80	90
1924	84	90
1925	122	90
1926	90	90
1927	77	90
1928	72	90
1929	71	90
1931	113	88
1932	80	88
1933	88	88
1934	84	88
1936	110	88
1937	62	88
1938	73	88
1939	94	88
1940	81	83
1941	114	83
1942	80	83
1943	64	83
1944	97	83
1945	85	83
1946	64	83
1947	86	83
1949	76	83
1950	48	96
1951	101	96
1952	106	96
1953	113	96
1954	118	96
1955	104	96
1958	92	96
1959	86	96
1960	91	87.3
1961	68	87.3
1962	108	87.3
1963	85	87.3
1964	95	87.3
1965	100	87.3
1966	83	87.3
1967	60	87.3
1968	91	87.3
1969	92	87.3
1970	94	85.1
1971	92	85.1
1972	91	85.1
1973	98	85.1
1974	67	85.1
1975	92	85.1
1976	62	85.1

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

First to last qualifying date each year at Palmetto
Year	First date	Last date
1896	1896-04-17	1896-09-19
1897	1897-05-28	1897-10-16
1898	1898-05-03	1898-10-07
1899	1899-04-27	1899-10-19
1900	1900-05-13	1900-10-03
1901	1901-05-01	1901-09-11
1902	1902-04-21	1902-09-23
1904	1904-05-23	1904-10-10
1907	1907-03-21	1907-10-03
1908	1908-03-18	1908-10-20
1909	1909-05-18	1909-10-18
1910	1910-03-24	1910-10-19
1911	1911-03-12	1911-10-07
1912	1912-05-23	1912-10-10
1913	1913-05-03	1913-10-10
1914	1914-04-17	1914-10-07
1915	1915-04-24	1915-11-01
1916	1916-05-07	1916-10-09
1917	1917-04-18	1917-09-09
1918	1918-05-21	1918-10-06
1919	1919-05-30	1919-10-10
1920	1920-05-22	1920-10-21
1921	1921-05-20	1921-10-24
1922	1922-05-10	1922-10-05
1923	1923-06-03	1923-09-30
1924	1924-06-07	1924-10-18
1925	1925-04-20	1925-10-04
1926	1926-05-09	1926-10-19
1927	1927-05-04	1927-10-29
1928	1928-05-11	1928-10-14
1929	1929-03-24	1929-09-29
1931	1931-05-17	1931-10-25
1932	1932-06-03	1932-09-18
1933	1933-05-20	1933-10-01
1934	1934-04-04	1934-09-26
1936	1936-05-06	1936-09-28
1937	1937-04-18	1937-10-06
1938	1938-05-19	1938-10-18
1939	1939-05-25	1939-10-24
1940	1940-05-06	1940-10-27
1941	1941-05-16	1941-10-23
1942	1942-04-17	1942-09-19
1943	1943-05-06	1943-09-15
1944	1944-05-11	1944-09-26
1945	1945-05-27	1945-10-01
1946	1946-06-08	1946-09-10
1947	1947-05-15	1947-10-22
1949	1949-05-05	1949-10-09
1950	1950-05-24	1950-10-18
1951	1951-05-01	1951-10-06
1952	1952-05-01	1952-10-01
1953	1953-05-23	1953-10-23
1954	1954-05-30	1954-10-06
1955	1955-04-17	1955-10-06
1958	1958-04-24	1958-09-26
1959	1959-04-30	1959-10-05
1960	1960-04-24	1960-10-03
1961	1961-06-01	1961-10-10
1962	1962-05-08	1962-10-13
1963	1963-04-21	1963-10-27
1964	1964-04-07	1964-10-27
1965	1965-04-22	1965-10-17
1966	1966-05-07	1966-09-27
1967	1967-03-13	1967-10-07
1968	1968-04-19	1968-10-02
1969	1969-05-05	1969-09-17
1970	1970-04-30	1970-09-26
1971	1971-04-19	1971-10-04
1972	1972-04-15	1972-09-25
1973	1973-05-23	1973-10-04
1974	1974-04-30	1974-09-12
1975	1975-04-27	1975-10-14
1976	1976-04-19	1976-09-24

Every Fixed Threshold

Fixed thresholds at Palmetto
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	73	122	1925	62
35 C (95 F): Days	69	56	1925	3
40 C (104 F): Days	5	6	1952	4
90 F (32.2 C): Days	73	99	1925	28
100 F (37.8 C): Days	29	22	1952	7
0 C (32 F): Ice days (max	66	17	1917	1
0 C (32 F): Frost days (min	72	102	1960	85
-10 C (14 F): Days with min	66	25	1963	11
-20 C (-4 F): Days with min	16	4	1899	2
20 C (68 F): Tropical nights (min	72	79	1921	22
25 C (77 F): Days with min	23	6	1936	2
10 mm (0.39 in): Days with 10 mm or more rain	77	58	1897	39
25 mm (0.98 in): Days with 25 mm or more rain	77	23	1912	13
50 mm (1.97 in): Days with 50 mm or more rain	72	8	1973	5
100 mm (3.94 in): Days with 100 mm or more rain	15	3	1973	2
10 cm (3.9 in): Days with 10 cm or more snowfall	19	3	1929	1
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1964	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1896.

Download the Data

Data for Palmetto 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).

Palmetto Threshold Days by Year (USC00406950)

Key Facts for Palmetto Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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