Llano Threshold Days by Year (USC00415272)

20 fixed thresholds counted per year at Llano (USC00415272): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Llano Thresholds

Llano: days with 10 mm (0.39 in) or more of precipitation in 127 years, most in 1919 with 45.
Llano: days with 25 mm (0.98 in) or more of precipitation in 127 years, most in 2009 with 15.
Llano: days with a maximum temperature at or above 30 C (86 F) in 115 years, most in 1938 with 204.
Llano: days with a maximum temperature at or above 35 C (95 F) in 115 years, most in 2011 with 127.
20 fixed thresholds have at least one qualifying day at Llano.

Days at or above 30 C (86 F)

115 years with a qualifying day

Days per year at Llano with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 204 in 1938.

Days at or above 30 C (86 F) per year at Llano
Year	Days	Decade average
1903	131	144.3
1906	142	144.3
1907	145	144.3
1909	159	144.3
1910	169	149.5
1911	163	149.5
1912	143	149.5
1913	126	149.5
1914	126	149.5
1915	125	149.5
1916	177	149.5
1917	169	149.5
1918	167	149.5
1919	130	149.5
1920	170	163.9
1921	172	163.9
1922	172	163.9
1923	147	163.9
1924	162	163.9
1925	182	163.9
1926	157	163.9
1927	170	163.9
1928	150	163.9
1929	157	163.9
1930	158	172.3
1931	156	172.3
1933	194	172.3
1934	166	172.3
1935	157	172.3
1936	160	172.3
1937	177	172.3
1938	204	172.3
1939	179	172.3
1940	160	153.3
1941	158	153.3
1942	127	153.3
1943	166	153.3
1944	141	153.3
1945	147	153.3
1946	131	153.3
1947	176	153.3
1948	174	153.3
1949	153	153.3
1950	176	156.3
1951	175	156.3
1952	142	156.3
1953	160	156.3
1954	193	156.3
1956	175	156.3
1957	126	156.3
1958	140	156.3
1959	120	156.3
1960	148	145.8
1961	142	145.8
1962	168	145.8
1963	168	145.8
1964	137	145.8
1965	140	145.8
1966	136	145.8
1967	160	145.8
1968	124	145.8
1969	135	145.8
1970	135	140.4
1971	140	140.4
1972	163	140.4
1973	138	140.4
1974	130	140.4
1975	133	140.4
1976	121	140.4
1977	149	140.4
1978	151	140.4
1979	144	140.4
1980	146	149.2
1981	142	149.2
1982	158	149.2
1983	136	149.2
1984	152	149.2
1985	149	149.2
1986	146	149.2
1987	137	149.2
1988	160	149.2
1989	166	149.2
1990	146	147.3
1991	147	147.3
1992	138	147.3
1993	136	147.3
1994	135	147.3
1995	152	147.3
1996	167	147.3
1999	157	147.3
2000	145	143.8
2002	138	143.8
2003	114	143.8
2004	143	143.8
2005	153	143.8
2006	179	143.8
2007	116	143.8
2008	150	143.8
2009	156	143.8
2010	159	165
2011	197	165
2012	162	165
2013	159	165
2014	171	165
2015	165	165
2016	153	165
2017	164	165
2018	158	165
2019	162	165
2020	158	154.8
2021	146	154.8
2022	192	154.8
2023	158	154.8
2025	200	154.8
2026	75	154.8

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

First to last qualifying date each year at Llano
Year	First date	Last date
1903	1903-04-01	1903-11-15
1906	1906-03-26	1906-10-26
1907	1907-03-12	1907-10-07
1909	1909-02-22	1909-11-01
1910	1910-01-01	1910-10-26
1911	1911-01-30	1911-11-11
1912	1912-03-18	1912-10-10
1913	1913-03-30	1913-10-15
1914	1914-03-28	1914-10-17
1915	1915-04-09	1915-11-08
1916	1916-03-01	1916-11-11
1917	1917-01-30	1917-10-28
1918	1918-02-23	1918-10-12
1919	1919-04-05	1919-11-06
1920	1920-02-23	1920-11-09
1921	1921-02-26	1921-11-24
1922	1922-02-09	1922-12-03
1923	1923-03-21	1923-12-29
1924	1924-03-26	1924-12-15
1925	1925-02-05	1925-10-23
1926	1926-03-24	1926-10-28
1927	1927-02-16	1927-11-07
1928	1928-03-12	1928-10-28
1929	1929-03-03	1929-11-11
1930	1930-02-12	1930-10-16
1931	1931-04-01	1931-11-07
1933	1933-02-23	1933-12-13
1934	1934-03-06	1934-11-10
1935	1935-03-19	1935-11-04
1936	1936-03-14	1936-11-02
1937	1937-02-07	1937-10-31
1938	1938-03-02	1938-11-17
1939	1939-03-10	1939-10-27
1940	1940-02-28	1940-10-23
1941	1941-03-31	1941-10-21
1942	1942-03-10	1942-10-11
1943	1943-01-23	1943-10-30
1944	1944-03-26	1944-10-07
1945	1945-03-16	1945-11-06
1946	1946-03-14	1946-10-30
1947	1947-04-01	1947-11-11
1948	1948-03-24	1948-11-05
1949	1949-03-25	1949-11-29
1950	1950-02-26	1950-11-20
1951	1951-03-07	1951-12-31
1952	1952-01-01	1952-11-02
1953	1953-01-27	1953-10-21
1954	1954-02-10	1954-12-05
1956	1956-02-18	1956-10-30
1957	1957-01-10	1957-11-01
1958	1958-04-05	1958-12-05
1959	1959-02-18	1959-10-25
1960	1960-02-10	1960-10-28
1961	1961-03-29	1961-10-12
1962	1962-02-09	1962-11-11
1963	1963-02-02	1963-11-08
1964	1964-04-04	1964-10-18
1965	1965-04-04	1965-11-27
1966	1966-04-01	1966-11-01
1967	1967-01-30	1967-10-14
1968	1968-04-14	1968-10-30
1969	1969-01-09	1969-11-09
1970	1970-04-13	1970-11-07
1971	1971-01-31	1971-10-17
1972	1972-01-24	1972-10-19
1973	1973-04-19	1973-11-23
1974	1974-03-03	1974-10-11
1975	1975-03-21	1975-11-10
1976	1976-02-10	1976-10-12
1977	1977-02-25	1977-11-01
1978	1978-04-02	1978-11-11
1979	1979-02-15	1979-10-30
1980	1980-02-21	1980-11-10
1981	1981-03-31	1981-11-19
1982	1982-02-23	1982-11-02
1983	1983-04-01	1983-11-23
1984	1984-03-14	1984-10-19
1985	1985-03-12	1985-10-25
1986	1986-02-19	1986-10-05
1987	1987-04-11	1987-11-06
1988	1988-03-11	1988-11-16
1989	1989-02-27	1989-11-15
1990	1990-04-28	1990-10-21
1991	1991-03-05	1991-10-28
1992	1992-04-07	1992-10-31
1993	1993-03-09	1993-10-19
1994	1994-03-06	1994-10-20
1995	1995-03-21	1995-12-13
1996	1996-02-14	1996-11-20
1999	1999-02-09	1999-10-23
2000	2000-01-19	2000-10-06
2002	2002-03-14	2002-11-11
2003	2003-04-05	2003-10-22
2004	2004-03-31	2004-11-08
2005	2005-02-16	2005-12-28
2006	2006-01-02	2006-11-16
2007	2007-04-04	2007-10-22
2008	2008-02-26	2008-10-27
2009	2009-01-04	2009-10-15
2010	2010-04-01	2010-12-22
2011	2011-02-27	2011-11-15
2012	2012-03-13	2012-12-19
2013	2013-01-25	2013-11-18
2014	2014-03-01	2014-10-28
2015	2015-03-25	2015-11-12
2016	2016-02-12	2016-11-03
2017	2017-01-25	2017-11-07
2018	2018-03-11	2018-11-07
2019	2019-02-15	2019-11-26
2020	2020-03-12	2020-10-23
2021	2021-03-16	2021-12-11
2022	2022-02-22	2022-11-07
2023	2023-01-12	2023-11-09
2025	2025-02-03	2025-12-26
2026	2026-02-09	2026-06-30

Every Fixed Threshold

Fixed thresholds at Llano
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	115	204	1938	75
35 C (95 F): Days	115	127	2011	14
40 C (104 F): Days	90	52	2023	2
45 C (113 F): Days	3	3	1933	1
90 F (32.2 C): Days	115	169	1933	51
100 F (37.8 C): Days	113	88	2011	6
110 F (43.3 C): Days	16	4	1933	1
0 C (32 F): Ice days (max	63	8	1989	2
0 C (32 F): Frost days (min	109	72	1929	32
-10 C (14 F): Days with min	55	8	1983	2
-20 C (-4 F): Days with min	2	1	1929	1
20 C (68 F): Tropical nights (min	109	141	1911	45
25 C (77 F): Days with min	88	32	1912	1
10 mm (0.39 in): Days with 10 mm or more rain	127	45	1919	15
25 mm (0.98 in): Days with 25 mm or more rain	127	15	2009	7
50 mm (1.97 in): Days with 50 mm or more rain	108	8	1936	1
100 mm (3.94 in): Days with 100 mm or more rain	23	1	1906	1
200 mm (7.87 in): Days with 200 mm or more rain	1	1	1952	1
10 cm (3.9 in): Days with 10 cm or more snowfall	9	1	1915	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 1903.

Download the Data

Data for Llano 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).

Llano Threshold Days by Year (USC00415272)

Key Facts for Llano Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

Related