Galveston Threshold Days by Year (USW00012944)

13 fixed thresholds counted per year at Galveston (USW00012944): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Galveston Thresholds

Galveston: days with 10 mm (0.39 in) or more of precipitation in 53 years, most in 1997 with 42.
Galveston: days with 25 mm (0.98 in) or more of precipitation in 53 years, most in 1991 with 21.
Galveston: days with 50 mm (1.97 in) or more of precipitation in 51 years, most in 1995 with 8.
Galveston: days with a maximum temperature at or above 30 C (86 F) in 50 years, most in 1996 with 122.
13 fixed thresholds have at least one qualifying day at Galveston.

Days at or above 30 C (86 F)

50 years with a qualifying day

Days per year at Galveston with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 122 in 1996.

Days at or above 30 C (86 F) per year at Galveston
Year	Days	Decade average
1947	95	88.7
1948	83	88.7
1949	88	88.7
1950	85	92
1951	89	92
1952	83	92
1953	105	92
1954	102	92
1955	90	92
1956	91	92
1957	87	92
1958	104	92
1959	84	92
1960	80	75.7
1961	51	75.7
1962	91	75.7
1963	81	75.7
1964	77	75.7
1965	91	75.7
1966	70	75.7
1967	51	75.7
1968	69	75.7
1969	96	75.7
1970	80	76.8
1971	69	76.8
1972	103	76.8
1973	74	76.8
1974	63	76.8
1975	78	76.8
1976	65	76.8
1977	59	76.8
1978	106	76.8
1979	71	76.8
1980	98	86.8
1981	97	86.8
1982	99	86.8
1983	88	86.8
1984	68	86.8
1985	64	86.8
1986	105	86.8
1987	89	86.8
1988	79	86.8
1989	81	86.8
1990	116	107.7
1991	94	107.7
1992	84	107.7
1993	99	107.7
1995	121	107.7
1996	122	107.7
1997	118	107.7

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

First to last qualifying date each year at Galveston
Year	First date	Last date
1947	1947-06-05	1947-10-15
1948	1948-05-18	1948-09-22
1949	1949-06-01	1949-09-28
1950	1950-05-31	1950-09-22
1951	1951-05-04	1951-10-06
1952	1952-06-02	1952-10-02
1953	1953-04-30	1953-09-30
1954	1954-06-03	1954-10-14
1955	1955-04-24	1955-10-06
1956	1956-05-08	1956-10-07
1957	1957-06-08	1957-09-22
1958	1958-05-25	1958-09-30
1959	1959-05-13	1959-10-03
1960	1960-06-03	1960-09-24
1961	1961-06-21	1961-09-28
1962	1962-06-13	1962-10-09
1963	1963-06-13	1963-10-10
1964	1964-06-12	1964-09-26
1965	1965-06-09	1965-09-22
1966	1966-05-09	1966-09-27
1967	1967-06-13	1967-09-16
1968	1968-06-09	1968-09-30
1969	1969-05-21	1969-09-28
1970	1970-06-06	1970-09-22
1971	1971-04-23	1971-09-29
1972	1972-05-18	1972-10-13
1973	1973-06-07	1973-10-07
1974	1974-05-26	1974-09-21
1975	1975-05-09	1975-09-19
1976	1976-05-16	1976-09-24
1977	1977-06-02	1977-10-01
1978	1978-05-13	1978-10-13
1979	1979-05-31	1979-09-13
1980	1980-05-27	1980-10-11
1981	1981-05-26	1981-10-12
1982	1982-04-05	1982-09-20
1983	1983-05-24	1983-10-05
1984	1984-05-03	1984-09-15
1985	1985-05-22	1985-09-23
1986	1986-06-12	1986-10-06
1987	1987-04-21	1987-09-18
1988	1988-04-25	1988-09-26
1989	1989-05-26	1989-10-01
1990	1990-05-28	1990-10-08
1991	1991-05-26	1991-09-18
1992	1992-06-09	1992-09-22
1993	1993-05-31	1993-10-02
1995	1995-05-11	1995-10-12
1996	1996-05-24	1996-09-27
1997	1997-05-21	1997-11-03

Every Fixed Threshold

Fixed thresholds at Galveston
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	50	122	1996	118
35 C (95 F): Days	22	20	1995	11
90 F (32.2 C): Days	50	84	1995	80
0 C (32 F): Ice days (max	9	3	1983	2
0 C (32 F): Frost days (min	41	14	1963	6
-10 C (14 F): Days with min	2	1	1983	1
20 C (68 F): Tropical nights (min	50	208	1963	162
25 C (77 F): Days with min	50	117	1990	84
10 mm (0.39 in): Days with 10 mm or more rain	53	42	1997	29
25 mm (0.98 in): Days with 25 mm or more rain	53	21	1991	16
50 mm (1.97 in): Days with 50 mm or more rain	51	8	1995	5
100 mm (3.94 in): Days with 100 mm or more rain	26	4	1961	3
200 mm (7.87 in): Days with 200 mm or more rain	4	1	1961	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1947.

Download the Data

Data for Galveston 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).

Galveston Threshold Days by Year (USW00012944)

Key Facts for Galveston Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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