Chisos Basin Threshold Days by Year (USC00411715)

16 fixed thresholds counted per year at Chisos Basin (USC00411715): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Chisos Basin Thresholds

Chisos Basin: days with 10 mm (0.39 in) or more of precipitation in 80 years, most in 1986 with 30.
Chisos Basin: days with a maximum temperature at or above 30 C (86 F) in 77 years, most in 2011 with 125.
Chisos Basin: days with a maximum temperature at or above 90 F (32.2 C) in 76 years, most in 2023 with 68.
Chisos Basin: days with 25 mm (0.98 in) or more of precipitation in 76 years, most in 1986 with 10.
16 fixed thresholds have at least one qualifying day at Chisos Basin.

Days at or above 30 C (86 F)

77 years with a qualifying day

Days per year at Chisos Basin with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 125 in 2011.

Days at or above 30 C (86 F) per year at Chisos Basin
Year	Days	Decade average
1948	99	80.5
1949	62	80.5
1950	69	93
1951	113	93
1952	86	93
1953	98	93
1954	96	93
1955	77	93
1956	100	93
1957	89	93
1958	99	93
1959	103	93
1960	91	76.7
1961	72	76.7
1962	113	76.7
1963	85	76.7
1964	80	76.7
1965	74	76.7
1966	66	76.7
1967	60	76.7
1968	45	76.7
1969	81	76.7
1970	55	56.7
1971	47	56.7
1972	65	56.7
1973	48	56.7
1974	73	56.7
1975	49	56.7
1976	38	56.7
1977	80	56.7
1978	63	56.7
1979	49	56.7
1980	78	49.4
1981	42	49.4
1982	54	49.4
1983	71	49.4
1984	44	49.4
1986	35	49.4
1987	35	49.4
1988	16	49.4
1989	70	49.4
1990	48	46.8
1991	35	46.8
1992	35	46.8
1993	38	46.8
1994	56	46.8
1995	49	46.8
1996	52	46.8
1997	36	46.8
1998	77	46.8
1999	42	46.8
2000	68	47.8
2001	71	47.8
2002	54	47.8
2003	29	47.8
2004	40	47.8
2005	62	47.8
2006	45	47.8
2007	11	47.8
2008	41	47.8
2009	57	47.8
2010	68	74.1
2011	125	74.1
2012	71	74.1
2013	74	74.1
2014	69	74.1
2015	71	74.1
2016	51	74.1
2017	57	74.1
2018	81	74.1
2020	106	88
2021	44	88
2022	90	88
2023	105	88
2024	100	88
2025	68	88
2026	103	88

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

First to last qualifying date each year at Chisos Basin
Year	First date	Last date
1948	1948-04-16	1948-09-24
1949	1949-03-25	1949-08-31
1950	1950-05-03	1950-10-07
1951	1951-04-24	1951-10-06
1952	1952-05-07	1952-09-20
1953	1953-05-09	1953-09-29
1954	1954-04-04	1954-10-13
1955	1955-04-16	1955-09-15
1956	1956-04-13	1956-10-04
1957	1957-04-20	1957-09-21
1958	1958-04-22	1958-09-25
1959	1959-04-04	1959-11-02
1960	1960-04-09	1960-10-05
1961	1961-04-19	1961-09-30
1962	1962-03-24	1962-10-07
1963	1963-03-29	1963-09-08
1964	1964-04-18	1964-09-14
1965	1965-04-14	1965-10-11
1966	1966-04-30	1966-08-22
1967	1967-04-05	1967-10-24
1968	1968-05-15	1968-08-16
1969	1969-04-26	1969-09-17
1970	1970-04-18	1970-09-08
1971	1971-04-27	1971-09-17
1972	1972-03-19	1972-10-15
1973	1973-05-01	1973-10-10
1974	1974-04-28	1974-09-12
1975	1975-04-17	1975-09-21
1976	1976-04-15	1976-08-16
1977	1977-05-03	1977-12-07
1978	1978-04-02	1978-09-18
1979	1979-05-08	1979-10-09
1980	1980-05-11	1980-09-19
1981	1981-05-27	1981-09-02
1982	1982-03-19	1982-09-29
1983	1983-04-30	1983-10-08
1984	1984-05-05	1984-09-12
1986	1986-04-09	1986-10-01
1987	1987-04-18	1987-09-13
1988	1988-05-02	1988-09-09
1989	1989-04-09	1989-10-15
1990	1990-03-13	1990-07-12
1991	1991-05-10	1991-07-22
1992	1992-06-11	1992-09-10
1993	1993-05-08	1993-08-21
1994	1994-05-07	1994-09-22
1995	1995-05-13	1995-09-08
1996	1996-04-26	1996-08-05
1997	1997-05-31	1997-10-03
1998	1998-03-27	1998-09-21
1999	1999-04-08	1999-09-27
2000	2000-04-19	2000-10-06
2001	2001-05-18	2001-09-19
2002	2002-04-25	2002-08-30
2003	2003-05-04	2003-07-24
2004	2004-05-19	2004-09-17
2005	2005-05-10	2005-09-29
2006	2006-04-15	2006-07-30
2007	2007-05-05	2007-08-25
2008	2008-05-01	2008-08-11
2009	2009-04-30	2009-10-07
2010	2010-05-06	2010-10-13
2011	2011-04-03	2011-10-07
2012	2012-04-25	2012-09-08
2013	2013-04-17	2013-09-06
2014	2014-05-06	2014-09-12
2015	2015-05-20	2015-09-28
2016	2016-04-16	2016-09-09
2017	2017-03-23	2017-09-24
2018	2018-04-12	2018-09-02
2020	2020-03-24	2020-10-12
2021	2021-04-27	2021-09-02
2022	2022-04-18	2022-08-16
2023	2023-05-02	2023-10-01
2024	2024-04-14	2024-09-22
2025	2025-04-14	2025-10-21
2026	2026-03-22	2026-10-15

Every Fixed Threshold

Fixed thresholds at Chisos Basin
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	77	125	2011	103
35 C (95 F): Days	55	22	2023	2
90 F (32.2 C): Days	76	68	2023	31
100 F (37.8 C): Days	7	3	1972	1
0 C (32 F): Ice days (max	45	4	2011	2
0 C (32 F): Frost days (min	74	53	1976	12
-10 C (14 F): Days with min	29	7	1989	2
20 C (68 F): Tropical nights (min	72	61	2011	43
25 C (77 F): Days with min	8	1	1957	1
10 mm (0.39 in): Days with 10 mm or more rain	80	30	1986	13
25 mm (0.98 in): Days with 25 mm or more rain	76	10	1986	4
50 mm (1.97 in): Days with 50 mm or more rain	35	5	2018	1
100 mm (3.94 in): Days with 100 mm or more rain	2	1	1966	1
10 cm (3.9 in): Days with 10 cm or more snowfall	11	1	1949	1
25 cm (9.8 in): Days with 25 cm or more snowfall	2	1	1986	1
50 cm (19.7 in): Days with 50 cm or more snowfall	1	1	2020	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1948.

Download the Data

Data for Chisos Basin 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).

Chisos Basin Threshold Days by Year (USC00411715)

Key Facts for Chisos Basin Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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