Bay Saint Louis Threshold Days by Year (USC00220519)

17 fixed thresholds counted per year at Bay Saint Louis (USC00220519): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Bay Saint Louis Thresholds

Bay Saint Louis: days with a maximum temperature at or above 30 C (86 F) in 81 years, most in 1943 with 146.
Bay Saint Louis: days with a maximum temperature at or above 35 C (95 F) in 81 years, most in 1931 with 29.
Bay Saint Louis: days with a maximum temperature at or above 90 F (32.2 C) in 81 years, most in 1921 with 99.
Bay Saint Louis: days with 10 mm (0.39 in) or more of precipitation in 80 years, most in 1946 with 58.
17 fixed thresholds have at least one qualifying day at Bay Saint Louis.

Days at or above 30 C (86 F)

81 years with a qualifying day

Days per year at Bay Saint Louis with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 146 in 1943.

Days at or above 30 C (86 F) per year at Bay Saint Louis
Year	Days	Decade average
1896	76	93
1897	82	93
1898	95	93
1899	119	93
1900	120	116.7
1901	108	116.7
1902	118	116.7
1904	122	116.7
1905	136	116.7
1906	122	116.7
1907	104	116.7
1908	107	116.7
1909	113	116.7
1910	119	119.6
1911	131	119.6
1912	113	119.6
1913	100	119.6
1914	121	119.6
1915	133	119.6
1916	117	119.6
1917	110	119.6
1919	132	119.6
1920	128	128.5
1921	135	128.5
1922	132	128.5
1923	121	128.5
1924	126	128.5
1925	141	128.5
1926	136	128.5
1927	111	128.5
1928	129	128.5
1929	126	128.5
1930	122	111.8
1931	138	111.8
1932	105	111.8
1933	110	111.8
1934	68	111.8
1935	75	111.8
1936	100	111.8
1937	129	111.8
1938	130	111.8
1939	141	111.8
1940	100	123.2
1941	136	123.2
1942	108	123.2
1943	146	123.2
1944	136	123.2
1945	121	123.2
1946	112	123.2
1947	117	123.2
1948	131	123.2
1949	125	123.2
1950	104	109
1951	122	109
1952	96	109
1953	109	109
1954	116	109
1955	113	109
1956	112	109
1957	108	109
1958	110	109
1959	100	109
1960	118	99.9
1961	88	99.9
1962	138	99.9
1963	110	99.9
1964	104	99.9
1965	102	99.9
1966	75	99.9
1967	72	99.9
1968	100	99.9
1969	92	99.9
1970	97	104.6
1971	99	104.6
1972	120	104.6
1973	110	104.6
1974	101	104.6
1975	87	104.6
1976	95	104.6
1977	113	104.6
1978	119	104.6

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

First to last qualifying date each year at Bay Saint Louis
Year	First date	Last date
1896	1896-05-23	1896-10-05
1897	1897-05-14	1897-09-29
1898	1898-05-25	1898-10-12
1899	1899-05-07	1899-10-21
1900	1900-05-01	1900-10-06
1901	1901-04-29	1901-10-02
1902	1902-04-19	1902-10-28
1904	1904-05-08	1904-10-19
1905	1905-04-07	1905-10-03
1906	1906-05-03	1906-10-21
1907	1907-05-21	1907-10-07
1908	1908-04-02	1908-09-23
1909	1909-05-25	1909-10-15
1910	1910-03-27	1910-10-20
1911	1911-05-13	1911-10-15
1912	1912-04-22	1912-10-12
1913	1913-05-18	1913-10-02
1914	1914-05-04	1914-10-10
1915	1915-04-18	1915-10-30
1916	1916-05-09	1916-10-14
1917	1917-04-30	1917-10-02
1919	1919-05-18	1919-10-31
1920	1920-05-02	1920-10-17
1921	1921-05-11	1921-10-26
1922	1922-04-14	1922-10-27
1923	1923-04-26	1923-10-03
1924	1924-05-24	1924-11-07
1925	1925-04-16	1925-10-18
1926	1926-05-11	1926-10-20
1927	1927-04-30	1927-10-29
1928	1928-05-12	1928-10-16
1929	1929-03-23	1929-10-18
1930	1930-04-07	1930-10-17
1931	1931-05-06	1931-10-26
1932	1932-04-24	1932-10-21
1933	1933-05-09	1933-10-08
1934	1934-05-23	1934-09-30
1935	1935-05-16	1935-11-07
1936	1936-05-08	1936-10-17
1937	1937-04-16	1937-10-08
1938	1938-04-30	1938-11-02
1939	1939-05-03	1939-10-27
1940	1940-04-03	1940-10-31
1941	1941-05-08	1941-10-24
1942	1942-05-06	1942-10-24
1943	1943-04-12	1943-10-14
1944	1944-05-14	1944-10-31
1945	1945-04-26	1945-10-02
1946	1946-03-30	1946-10-20
1947	1947-05-01	1947-09-26
1948	1948-04-08	1948-10-17
1949	1949-05-03	1949-10-19
1950	1950-05-12	1950-10-13
1951	1951-05-03	1951-10-06
1952	1952-04-29	1952-10-01
1953	1953-05-09	1953-10-23
1954	1954-05-02	1954-10-06
1955	1955-04-24	1955-10-06
1956	1956-04-29	1956-10-07
1957	1957-05-12	1957-09-22
1958	1958-05-25	1958-10-23
1959	1959-05-08	1959-10-10
1960	1960-04-28	1960-10-17
1961	1961-04-28	1961-10-02
1962	1962-05-08	1962-10-19
1963	1963-04-05	1963-10-29
1964	1964-04-28	1964-10-01
1965	1965-05-13	1965-10-11
1966	1966-05-10	1966-10-06
1967	1967-04-23	1967-10-16
1968	1968-05-15	1968-10-06
1969	1969-05-21	1969-10-14
1970	1970-04-28	1970-10-04
1971	1971-05-19	1971-10-08
1972	1972-04-17	1972-11-02
1973	1973-05-13	1973-10-12
1974	1974-05-13	1974-09-29
1975	1975-03-25	1975-09-21
1976	1976-04-22	1976-10-04
1977	1977-05-10	1977-10-03
1978	1978-04-20	1978-10-06

Every Fixed Threshold

Fixed thresholds at Bay Saint Louis
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	81	146	1943	119
35 C (95 F): Days	81	29	1931	9
40 C (104 F): Days	1	1	1932	1
90 F (32.2 C): Days	81	99	1921	65
100 F (37.8 C): Days	23	4	1901	1
0 C (32 F): Ice days (max	4	3	1899	1
0 C (32 F): Frost days (min	77	38	1940	33
-10 C (14 F): Days with min	7	5	1962	2
20 C (68 F): Tropical nights (min	77	165	1898	134
25 C (77 F): Days with min	77	50	1897	4
10 mm (0.39 in): Days with 10 mm or more rain	80	58	1946	43
25 mm (0.98 in): Days with 25 mm or more rain	80	32	1919	22
50 mm (1.97 in): Days with 50 mm or more rain	80	13	1900	11
100 mm (3.94 in): Days with 100 mm or more rain	48	5	1900	2
200 mm (7.87 in): Days with 200 mm or more rain	9	2	1900	1
10 cm (3.9 in): Days with 10 cm or more snowfall	1	1	1964	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 Bay Saint Louis 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).

Bay Saint Louis Threshold Days by Year (USC00220519)

Key Facts for Bay Saint Louis Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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