Houston Threshold Days by Year (USC00224265)

17 fixed thresholds counted per year at Houston (USC00224265): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Houston Thresholds

Houston: days with 10 mm (0.39 in) or more of precipitation in 68 years, most in 2020 with 65.
Houston: days with 25 mm (0.98 in) or more of precipitation in 68 years, most in 2019 with 32.
Houston: days with 50 mm (1.97 in) or more of precipitation in 68 years, most in 1991 with 12.
Houston: nights with a minimum temperature at or below 0 C (32 F) in 65 years, most in 1960 with 102.
17 fixed thresholds have at least one qualifying day at Houston.

Days at or above 30 C (86 F)

64 years with a qualifying day

Days per year at Houston with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 145 in 1953.

Days at or above 30 C (86 F) per year at Houston
Year	Days	Decade average
1944	124	115.3
1945	102	115.3
1948	126	115.3
1949	109	115.3
1950	103	114.8
1952	127	114.8
1953	145	114.8
1954	128	114.8
1955	125	114.8
1956	110	114.8
1957	103	114.8
1958	96	114.8
1959	96	114.8
1960	95	98.2
1962	113	98.2
1963	87	98.2
1964	103	98.2
1965	119	98.2
1966	95	98.2
1967	83	98.2
1968	88	98.2
1969	101	98.2
1970	105	100
1971	101	100
1972	112	100
1973	112	100
1974	79	100
1975	88	100
1976	78	100
1977	126	100
1978	110	100
1979	89	100
1980	117	109.5
1981	108	109.5
1982	119	109.5
1983	86	109.5
1984	98	109.5
1985	98	109.5
1986	128	109.5
1987	122	109.5
1991	101	84.9
1992	57	84.9
1993	82	84.9
1994	61	84.9
1995	98	84.9
1996	90	84.9
1997	76	84.9
1998	111	84.9
1999	88	84.9
2000	116	101.3
2002	106	101.3
2003	73	101.3
2004	81	101.3
2005	113	101.3
2006	119	101.3
2015	99	124.2
2016	144	124.2
2017	111	124.2
2018	137	124.2
2019	130	124.2
2020	103	107.3
2021	92	107.3
2022	117	107.3
2023	117	107.3

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

First to last qualifying date each year at Houston
Year	First date	Last date
1944	1944-05-11	1944-10-25
1945	1945-03-16	1945-10-01
1948	1948-04-08	1948-09-23
1949	1949-02-15	1949-10-21
1950	1950-04-23	1950-10-30
1952	1952-04-30	1952-10-06
1953	1953-04-08	1953-10-23
1954	1954-04-08	1954-10-15
1955	1955-04-17	1955-11-15
1956	1956-05-12	1956-10-01
1957	1957-04-30	1957-09-23
1958	1958-04-25	1958-09-27
1959	1959-05-02	1959-10-12
1960	1960-05-19	1960-09-23
1962	1962-04-30	1962-10-16
1963	1963-04-01	1963-10-14
1964	1964-05-18	1964-09-29
1965	1965-04-10	1965-11-27
1966	1966-05-08	1966-10-10
1967	1967-03-13	1967-10-15
1968	1968-04-20	1968-10-03
1969	1969-05-03	1969-10-13
1970	1970-04-24	1970-10-12
1971	1971-04-20	1971-10-05
1972	1972-04-13	1972-10-17
1973	1973-05-11	1973-10-08
1974	1974-04-01	1974-09-21
1975	1975-04-25	1975-10-14
1976	1976-06-09	1976-10-03
1977	1977-04-14	1977-10-02
1978	1978-04-08	1978-11-04
1979	1979-05-11	1979-10-02
1980	1980-04-23	1980-10-12
1981	1981-04-15	1981-10-06
1982	1982-03-19	1982-10-10
1983	1983-05-30	1983-09-20
1984	1984-05-07	1984-10-17
1985	1985-05-07	1985-10-14
1986	1986-04-07	1986-10-05
1987	1987-04-20	1987-09-29
1991	1991-05-15	1991-09-19
1992	1992-05-20	1992-09-22
1993	1993-06-07	1993-09-26
1994	1994-06-02	1994-10-02
1995	1995-04-10	1995-10-16
1996	1996-02-26	1996-09-24
1997	1997-05-19	1997-10-11
1998	1998-05-25	1998-10-06
1999	1999-05-23	1999-10-04
2000	2000-05-12	2000-10-29
2002	2002-03-26	2002-10-07
2003	2003-05-09	2003-10-25
2004	2004-05-08	2004-10-05
2005	2005-05-12	2005-10-20
2006	2006-04-18	2006-10-06
2015	2015-04-09	2015-10-16
2016	2016-03-16	2016-11-05
2017	2017-03-21	2017-10-16
2018	2018-05-03	2018-10-15
2019	2019-04-11	2019-10-08
2020	2020-03-27	2020-09-18
2021	2021-05-04	2021-10-16
2022	2022-05-01	2022-09-26
2023	2023-04-05	2023-10-04

Every Fixed Threshold

Fixed thresholds at Houston
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	64	145	1953	117
35 C (95 F): Days	59	81	1954	22
40 C (104 F): Days	4	6	1954	1
90 F (32.2 C): Days	64	116	1953	66
100 F (37.8 C): Days	21	31	1954	3
0 C (32 F): Ice days (max	47	13	1978	4
0 C (32 F): Frost days (min	65	102	1960	57
-10 C (14 F): Days with min	52	22	1963	3
-20 C (-4 F): Days with min	3	2	1962	1
20 C (68 F): Tropical nights (min	65	110	2018	69
25 C (77 F): Days with min	10	2	1997	2
10 mm (0.39 in): Days with 10 mm or more rain	68	65	2020	25
25 mm (0.98 in): Days with 25 mm or more rain	68	32	2019	10
50 mm (1.97 in): Days with 50 mm or more rain	68	12	1991	1
100 mm (3.94 in): Days with 100 mm or more rain	28	4	1991	1
10 cm (3.9 in): Days with 10 cm or more snowfall	9	1	1949	1
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1966	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1944.

Download the Data

Data for Houston 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).

Houston Threshold Days by Year (USC00224265)

Key Facts for Houston Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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