Callahan Threshold Days by Year

16 fixed thresholds counted per year at Callahan (USC00041316): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Callahan Thresholds

Callahan: days with 10 mm (0.39 in) or more of precipitation in 72 years, most in 1998 with 32.
Callahan: days with 25 mm (0.98 in) or more of precipitation in 71 years, most in 1957 with 8.
Callahan: days with a maximum temperature at or above 30 C (86 F) in 63 years, most in 1967 with 105.
Callahan: days with a maximum temperature at or above 90 F (32.2 C) in 63 years, most in 1967 with 85.
16 fixed thresholds have at least one qualifying day at Callahan.

Days at or above 30 C (86 F)

63 years with a qualifying day

Days per year at Callahan with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 105 in 1967.

Days at or above 30 C (86 F) per year at Callahan
Year	Days	Decade average
1954	66	80.2
1955	78	80.2
1956	77	80.2
1957	88	80.2
1958	89	80.2
1959	83	80.2
1960	104	82.5
1961	79	82.5
1962	83	82.5
1963	74	82.5
1964	70	82.5
1965	70	82.5
1966	72	82.5
1967	105	82.5
1968	78	82.5
1969	90	82.5
1970	96	51.1
1972	49	51.1
1973	62	51.1
1974	54	51.1
1975	39	51.1
1976	33	51.1
1977	52	51.1
1978	32	51.1
1979	43	51.1
1980	39	49.5
1981	63	49.5
1982	38	49.5
1983	34	49.5
1984	55	49.5
1985	54	49.5
1986	60	49.5
1987	52	49.5
1988	65	49.5
1989	35	49.5
1990	36	46.2
1991	58	46.2
1992	56	46.2
1993	28	46.2
1994	63	46.2
1995	35	46.2
1996	56	46.2
1997	36	46.2
1998	53	46.2
1999	41	46.2
2000	57	64.7
2001	67	64.7
2002	65	64.7
2003	70	64.7
2004	55	64.7
2005	62	64.7
2006	70	64.7
2007	56	64.7
2008	71	64.7
2009	74	64.7
2010	62	74.9
2011	64	74.9
2012	74	74.9
2013	70	74.9
2014	81	74.9
2015	75	74.9
2016	81	74.9
2017	92	74.9

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

First to last qualifying date each year at Callahan
Year	First date	Last date
1954	1954-05-06	1954-09-27
1955	1955-05-19	1955-09-09
1956	1956-05-16	1956-09-24
1957	1957-05-26	1957-09-24
1958	1958-05-08	1958-10-05
1959	1959-05-11	1959-09-12
1960	1960-05-30	1960-10-02
1961	1961-05-19	1961-09-12
1962	1962-06-08	1962-09-24
1963	1963-05-17	1963-10-03
1964	1964-06-13	1964-10-06
1965	1965-05-29	1965-10-09
1966	1966-04-24	1966-10-01
1967	1967-05-15	1967-09-29
1968	1968-06-01	1968-10-03
1969	1969-05-06	1969-09-26
1970	1970-05-15	1970-10-04
1972	1972-05-27	1972-09-04
1973	1973-05-13	1973-09-13
1974	1974-06-10	1974-09-26
1975	1975-05-30	1975-09-09
1976	1976-06-18	1976-09-10
1977	1977-06-04	1977-09-12
1978	1978-06-05	1978-08-11
1979	1979-05-20	1979-10-03
1980	1980-06-28	1980-10-06
1981	1981-06-23	1981-09-18
1982	1982-05-25	1982-09-08
1983	1983-05-24	1983-09-13
1984	1984-05-28	1984-09-18
1985	1985-06-11	1985-08-26
1986	1986-05-27	1986-09-07
1987	1987-05-06	1987-10-04
1988	1988-06-14	1988-10-01
1989	1989-06-12	1989-09-14
1990	1990-05-04	1990-09-22
1991	1991-06-09	1991-10-04
1992	1992-05-04	1992-09-29
1993	1993-06-18	1993-10-03
1994	1994-06-10	1994-09-27
1995	1995-06-24	1995-09-15
1996	1996-06-02	1996-10-09
1997	1997-05-11	1997-08-16
1998	1998-07-06	1998-09-15
1999	1999-05-23	1999-09-20
2000	2000-05-21	2000-09-20
2001	2001-05-21	2001-10-04
2002	2002-06-12	2002-09-25
2003	2003-05-23	2003-09-29
2004	2004-06-04	2004-09-10
2005	2005-05-26	2005-09-21
2006	2006-05-14	2006-09-28
2007	2007-05-30	2007-09-12
2008	2008-05-15	2008-09-29
2009	2009-04-22	2009-09-28
2010	2010-06-24	2010-10-02
2011	2011-06-21	2011-09-29
2012	2012-05-13	2012-10-02
2013	2013-06-04	2013-09-15
2014	2014-05-01	2014-09-21
2015	2015-05-29	2015-09-25
2016	2016-05-31	2016-09-29
2017	2017-05-22	2017-09-14

Every Fixed Threshold

Fixed thresholds at Callahan
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	63	105	1967	92
35 C (95 F): Days	57	46	1967	23
40 C (104 F): Days	10	6	1960	1
90 F (32.2 C): Days	63	85	1967	62
100 F (37.8 C): Days	30	26	1960	4
0 C (32 F): Ice days (max	50	13	1974	3
0 C (32 F): Frost days (min	62	187	2013	135
-10 C (14 F): Days with min	55	32	2013	2
-20 C (-4 F): Days with min	5	3	1972	2
20 C (68 F): Tropical nights (min	2	1	1985	1
10 mm (0.39 in): Days with 10 mm or more rain	72	32	1998	14
25 mm (0.98 in): Days with 25 mm or more rain	71	8	1957	5
50 mm (1.97 in): Days with 50 mm or more rain	31	3	1964	1
100 mm (3.94 in): Days with 100 mm or more rain	4	2	1995	1
10 cm (3.9 in): Days with 10 cm or more snowfall	32	8	1952	1
25 cm (9.8 in): Days with 25 cm or more snowfall	4	1	1952	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1954.

Download the Data

Data for Callahan 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).

Callahan Threshold Days by Year

Key Facts for Callahan Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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