Chattanooga Threshold Days by Year (USC00341706)

18 fixed thresholds counted per year at Chattanooga (USC00341706): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Chattanooga Thresholds

Chattanooga: days with 10 mm (0.39 in) or more of precipitation in 101 years, most in 1941 with 41.
Chattanooga: days with 25 mm (0.98 in) or more of precipitation in 101 years, most in 1906 with 17.
Chattanooga: days with a maximum temperature at or above 30 C (86 F) in 98 years, most in 1956 with 162.
Chattanooga: days with a maximum temperature at or above 35 C (95 F) in 98 years, most in 1984 with 110.
18 fixed thresholds have at least one qualifying day at Chattanooga.

Days at or above 30 C (86 F)

98 years with a qualifying day

Days per year at Chattanooga with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 162 in 1956.

Days at or above 30 C (86 F) per year at Chattanooga
Year	Days	Decade average
1906	102	118.3
1907	126	118.3
1908	122	118.3
1909	123	118.3
1910	122	117.7
1911	127	117.7
1912	104	117.7
1913	102	117.7
1914	115	117.7
1915	97	117.7
1916	136	117.7
1917	132	117.7
1918	142	117.7
1919	100	117.7
1920	103	123.1
1921	139	123.1
1922	124	123.1
1924	124	123.1
1925	121	123.1
1926	107	123.1
1927	143	123.1
1929	124	123.1
1930	132	135.6
1931	126	135.6
1933	138	135.6
1934	145	135.6
1935	116	135.6
1936	128	135.6
1937	140	135.6
1938	147	135.6
1939	148	135.6
1940	120	118.6
1941	102	118.6
1942	116	118.6
1943	125	118.6
1944	130	118.6
1945	114	118.6
1946	112	118.6
1948	133	118.6
1949	115	118.6
1950	125	134.5
1951	136	134.5
1952	142	134.5
1953	124	134.5
1954	139	134.5
1955	141	134.5
1956	162	134.5
1957	116	134.5
1958	122	134.5
1959	138	134.5
1960	137	128.6
1961	121	128.6
1962	140	128.6
1963	161	128.6
1964	128	128.6
1965	118	128.6
1966	116	128.6
1967	133	128.6
1968	116	128.6
1969	116	128.6
1970	124	133.2
1971	141	133.2
1972	154	133.2
1973	124	133.2
1974	119	133.2
1975	124	133.2
1976	119	133.2
1977	140	133.2
1978	149	133.2
1979	138	133.2
1980	147	130.3
1981	133	130.3
1982	136	130.3
1983	136	130.3
1984	146	130.3
1985	112	130.3
1986	116	130.3
1987	126	130.3
1988	126	130.3
1989	125	130.3
1990	126	128.1
1991	133	128.1
1993	130	128.1
1994	140	128.1
1995	121	128.1
1996	127	128.1
1997	123	128.1
1998	143	128.1
1999	110	128.1
2000	121	121.3
2001	119	121.3
2002	112	121.3
2003	125	121.3
2004	115	121.3
2005	124	121.3
2006	142	121.3
2007	116	121.3
2008	118	121.3

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

First to last qualifying date each year at Chattanooga
Year	First date	Last date
1906	1906-04-26	1906-10-04
1907	1907-03-04	1907-11-05
1908	1908-02-28	1908-10-18
1909	1909-03-05	1909-11-04
1910	1910-03-04	1910-10-26
1911	1911-01-31	1911-11-11
1912	1912-03-18	1912-10-09
1913	1913-04-16	1913-09-22
1914	1914-04-15	1914-10-17
1915	1915-04-27	1915-10-29
1916	1916-03-05	1916-10-08
1917	1917-02-25	1917-10-28
1918	1918-02-23	1918-10-08
1919	1919-05-04	1919-10-23
1920	1920-04-16	1920-10-11
1921	1921-03-05	1921-10-27
1922	1922-04-12	1922-10-27
1924	1924-04-15	1924-11-06
1925	1925-03-07	1925-10-06
1926	1926-04-23	1926-10-18
1927	1927-04-03	1927-11-10
1929	1929-03-06	1929-10-17
1930	1930-02-23	1930-10-09
1931	1931-05-15	1931-10-10
1933	1933-04-04	1933-10-11
1934	1934-03-20	1934-11-07
1935	1935-04-14	1935-10-20
1936	1936-03-14	1936-10-19
1937	1937-04-15	1937-10-30
1938	1938-03-20	1938-10-31
1939	1939-03-14	1939-12-10
1940	1940-02-29	1940-10-27
1941	1941-05-14	1941-10-13
1942	1942-04-03	1942-10-09
1943	1943-04-03	1943-10-29
1944	1944-04-21	1944-10-31
1945	1945-05-01	1945-11-06
1946	1946-03-30	1946-10-17
1948	1948-04-06	1948-10-16
1949	1949-04-08	1949-10-20
1950	1950-01-25	1950-10-31
1951	1951-02-12	1951-10-21
1952	1952-03-31	1952-10-26
1953	1953-03-20	1953-10-11
1954	1954-03-10	1954-10-18
1955	1955-03-03	1955-10-20
1956	1956-02-24	1956-10-14
1957	1957-05-16	1957-10-05
1958	1958-04-23	1958-10-23
1959	1959-03-14	1959-10-25
1960	1960-03-31	1960-10-11
1961	1961-04-19	1961-10-12
1962	1962-02-11	1962-10-15
1963	1963-03-18	1963-11-07
1964	1964-04-02	1964-10-17
1965	1965-04-03	1965-11-25
1966	1966-03-21	1966-10-13
1967	1967-03-02	1967-10-14
1968	1968-05-02	1968-10-30
1969	1969-04-08	1969-10-11
1970	1970-04-28	1970-10-08
1971	1971-03-13	1971-10-16
1972	1972-03-26	1972-10-18
1973	1973-04-20	1973-11-01
1974	1974-03-02	1974-10-18
1975	1975-04-17	1975-10-14
1976	1976-02-20	1976-10-11
1977	1977-05-01	1977-10-26
1978	1978-03-22	1978-10-21
1979	1979-05-07	1979-10-22
1980	1980-04-06	1980-11-08
1981	1981-03-30	1981-10-14
1982	1982-03-12	1982-10-31
1983	1983-03-02	1983-10-06
1984	1984-04-20	1984-10-18
1985	1985-04-15	1985-09-27
1986	1986-04-07	1986-10-01
1987	1987-04-17	1987-10-09
1988	1988-03-24	1988-11-09
1989	1989-03-11	1989-10-24
1990	1990-05-14	1990-10-16
1991	1991-03-05	1991-10-24
1993	1993-04-12	1993-10-16
1994	1994-03-17	1994-10-05
1995	1995-03-22	1995-10-27
1996	1996-02-21	1996-09-23
1997	1997-03-21	1997-10-09
1998	1998-04-15	1998-10-29
1999	1999-04-21	1999-10-27
2000	2000-04-06	2000-10-06
2001	2001-05-03	2001-11-02
2002	2002-03-14	2002-10-04
2003	2003-03-25	2003-10-31
2004	2004-04-16	2004-10-22
2005	2005-05-09	2005-11-09
2006	2006-03-02	2006-10-07
2007	2007-05-05	2007-10-22
2008	2008-03-28	2008-10-05

Every Fixed Threshold

Fixed thresholds at Chattanooga
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	98	162	1956	118
35 C (95 F): Days	98	110	1984	59
40 C (104 F): Days	83	44	1980	9
45 C (113 F): Days	9	3	1936	1
90 F (32.2 C): Days	98	137	1956	95
100 F (37.8 C): Days	96	80	1998	24
110 F (43.3 C): Days	27	8	1980	4
0 C (32 F): Ice days (max	88	16	1978	6
0 C (32 F): Frost days (min	96	115	2008	115
-10 C (14 F): Days with min	90	19	1912	12
-20 C (-4 F): Days with min	9	3	1912	2
20 C (68 F): Tropical nights (min	96	98	1939	57
25 C (77 F): Days with min	78	25	1934	12
10 mm (0.39 in): Days with 10 mm or more rain	101	41	1941	12
25 mm (0.98 in): Days with 25 mm or more rain	101	17	1906	5
50 mm (1.97 in): Days with 50 mm or more rain	87	6	1985	2
100 mm (3.94 in): Days with 100 mm or more rain	23	1	1908	1
10 cm (3.9 in): Days with 10 cm or more snowfall	11	2	1937	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 Chattanooga 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 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Chattanooga Threshold Days by Year (USC00341706)

Key Facts for Chattanooga Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

Related