Houston Threshold Days by Year (USC00234019)

19 fixed thresholds counted per year at Houston (USC00234019): 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 78 years, most in 1990 with 56.
Houston: days with 25 mm (0.98 in) or more of precipitation in 78 years, most in 1905 with 20.
Houston: days with a maximum temperature at or above 30 C (86 F) in 72 years, most in 1901 with 116.
Houston: days with a maximum temperature at or above 90 F (32.2 C) in 72 years, most in 1901 with 95.
19 fixed thresholds have at least one qualifying day at Houston.

Days at or above 30 C (86 F)

72 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 116 in 1901.

Days at or above 30 C (86 F) per year at Houston
Year	Days	Decade average
1894	58	83
1895	74	83
1896	86	83
1897	98	83
1898	84	83
1899	98	83
1900	78	66.4
1901	116	66.4
1902	78	66.4
1903	52	66.4
1904	43	66.4
1905	42	66.4
1906	52	66.4
1907	66	66.4
1908	60	66.4
1909	77	66.4
1910	58	68.9
1911	95	68.9
1912	62	68.9
1913	93	68.9
1914	82	68.9
1915	38	68.9
1916	76	68.9
1917	54	68.9
1918	68	68.9
1919	63	68.9
1920	51	80
1921	96	80
1922	93	80
1954	108	84.2
1955	90	84.2
1956	91	84.2
1957	68	84.2
1958	69	84.2
1959	79	84.2
1962	80	72.5
1963	85	72.5
1964	84	72.5
1965	71	72.5
1966	62	72.5
1967	56	72.5
1968	65	72.5
1969	77	72.5
1970	77	72.5
1972	68	72.5
1988	95	83.5
1989	72	83.5
1990	53	50.9
1991	68	50.9
1992	30	50.9
1993	55	50.9
1994	32	50.9
1995	60	50.9
1999	58	50.9
2000	74	61.3
2001	76	61.3
2003	33	61.3
2005	73	61.3
2006	65	61.3
2009	47	61.3
2010	79	61.3
2011	74	61.3
2012	81	61.3
2014	42	61.3
2015	41	61.3
2016	52	61.3
2017	49	61.3
2018	86	61.3
2019	48	61.3
2020	50	63.7
2024	52	63.7
2026	89	63.7

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
1894	1894-05-07	1894-09-09
1895	1895-05-28	1895-09-25
1896	1896-04-24	1896-09-26
1897	1897-05-22	1897-10-16
1898	1898-05-11	1898-09-28
1899	1899-04-12	1899-10-15
1900	1900-04-29	1900-10-03
1901	1901-04-28	1901-10-01
1902	1902-04-20	1902-09-07
1903	1903-05-23	1903-09-09
1904	1904-05-23	1904-10-08
1905	1905-04-09	1905-09-22
1906	1906-04-29	1906-09-21
1907	1907-03-19	1907-10-02
1908	1908-05-20	1908-09-19
1909	1909-04-17	1909-10-05
1910	1910-03-22	1910-10-02
1911	1911-03-09	1911-10-06
1912	1912-05-21	1912-10-06
1913	1913-04-18	1913-09-11
1914	1914-05-05	1914-09-07
1915	1915-04-28	1915-09-14
1916	1916-03-21	1916-10-08
1917	1917-05-19	1917-10-16
1918	1918-04-02	1918-10-05
1919	1919-06-08	1919-10-01
1920	1920-05-26	1920-09-15
1921	1921-05-20	1921-09-28
1922	1922-04-06	1922-10-05
1954	1954-04-06	1954-10-05
1955	1955-04-15	1955-09-29
1956	1956-05-07	1956-10-05
1957	1957-05-16	1957-10-02
1958	1958-05-13	1958-10-17
1959	1959-05-02	1959-09-25
1962	1962-04-30	1962-10-13
1963	1963-04-22	1963-10-23
1964	1964-05-18	1964-10-18
1965	1965-04-09	1965-09-20
1966	1966-05-07	1966-09-05
1967	1967-03-14	1967-10-05
1968	1968-05-03	1968-10-16
1969	1969-05-28	1969-10-05
1970	1970-04-29	1970-09-22
1972	1972-04-13	1972-09-21
1988	1988-04-21	1988-10-18
1989	1989-04-23	1989-10-15
1990	1990-04-23	1990-09-11
1991	1991-05-15	1991-09-16
1992	1992-06-16	1992-09-08
1993	1993-06-18	1993-09-03
1994	1994-07-01	1994-10-01
1995	1995-05-14	1995-09-15
1999	1999-06-04	1999-09-28
2000	2000-04-19	2000-10-14
2001	2001-04-08	2001-09-07
2003	2003-06-23	2003-08-28
2005	2005-05-10	2005-09-24
2006	2006-04-14	2006-10-04
2009	2009-05-31	2009-09-19
2010	2010-05-24	2010-09-22
2011	2011-04-04	2011-09-14
2012	2012-04-02	2012-09-26
2014	2014-05-05	2014-10-02
2015	2015-06-08	2015-09-18
2016	2016-03-16	2016-10-20
2017	2017-03-21	2017-10-15
2018	2018-05-10	2018-10-07
2019	2019-05-17	2019-10-03
2020	2020-04-09	2020-09-08
2024	2024-06-14	2024-09-21
2026	2026-03-20	2026-10-13

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	72	116	1901	89
35 C (95 F): Days	64	58	1901	33
40 C (104 F): Days	7	10	1954	1
90 F (32.2 C): Days	72	95	1901	63
100 F (37.8 C): Days	34	23	1901	9
110 F (43.3 C): Days	1	2	1901	2
0 C (32 F): Ice days (max	72	33	1963	8
0 C (32 F): Frost days (min	62	133	1912	32
-10 C (14 F): Days with min	62	47	1895	13
-20 C (-4 F): Days with min	35	8	1895	2
-30 C (-22 F): Days with min	2	2	1899	1
20 C (68 F): Tropical nights (min	62	62	2010	65
25 C (77 F): Days with min	8	5	1988	3
10 mm (0.39 in): Days with 10 mm or more rain	78	56	1990	18
25 mm (0.98 in): Days with 25 mm or more rain	78	20	1905	7
50 mm (1.97 in): Days with 50 mm or more rain	70	6	1994	1
100 mm (3.94 in): Days with 100 mm or more rain	10	2	1956	1
10 cm (3.9 in): Days with 10 cm or more snowfall	13	2	2000	1
25 cm (9.8 in): Days with 25 cm or more snowfall	2	0	n/a	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1894.

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 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Houston Threshold Days by Year (USC00234019)

Key Facts for Houston Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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