Llano Threshold Days by Year (USC00045001)

16 fixed thresholds counted per year at Llano (USC00045001): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Llano Thresholds

Llano: days with a maximum temperature at or above 30 C (86 F) in 23 years, most in 1940 with 134.
Llano: days with a maximum temperature at or above 35 C (95 F) in 23 years, most in 1917 with 75.
Llano: days with a maximum temperature at or above 90 F (32.2 C) in 23 years, most in 1917 with 113.
Llano: nights with a minimum temperature at or below 0 C (32 F) in 23 years, most in 1933 with 76.
16 fixed thresholds have at least one qualifying day at Llano.

Days at or above 30 C (86 F)

23 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 134 in 1940.

Days at or above 30 C (86 F) per year at Llano
Year	Days	Decade average
1917	124	88.5
1918	53	88.5
1923	97	112
1924	119	112
1925	104	112
1927	107	112
1928	130	112
1929	115	112
1930	101	107.4
1931	75	107.4
1932	114	107.4
1933	128	107.4
1934	126	107.4
1935	118	107.4
1936	111	107.4
1937	104	107.4
1938	108	107.4
1939	89	107.4
1940	134	115.2
1941	95	115.2
1942	128	115.2
1943	123	115.2
1944	96	115.2

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
1917	1917-04-06	1917-10-11
1918	1918-06-06	1918-09-19
1923	1923-05-06	1923-09-19
1924	1924-05-02	1924-10-01
1925	1925-05-03	1925-09-30
1927	1927-04-20	1927-10-15
1928	1928-04-28	1928-10-06
1929	1929-03-28	1929-10-18
1930	1930-05-20	1930-11-03
1931	1931-05-29	1931-10-16
1932	1932-05-10	1932-10-15
1933	1933-05-25	1933-10-19
1934	1934-03-30	1934-10-12
1935	1935-05-22	1935-10-09
1936	1936-04-11	1936-10-14
1937	1937-05-12	1937-10-25
1938	1938-04-18	1938-09-30
1939	1939-05-28	1939-09-20
1940	1940-04-13	1940-10-21
1941	1941-05-07	1941-10-01
1942	1942-03-30	1942-10-22
1943	1943-04-22	1943-10-16
1944	1944-05-05	1944-10-06

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	23	134	1940	96
35 C (95 F): Days	23	75	1917	39
40 C (104 F): Days	20	16	1942	2
90 F (32.2 C): Days	23	113	1917	78
100 F (37.8 C): Days	22	49	1942	20
110 F (43.3 C): Days	2	2	1942	2
0 C (32 F): Ice days (max	5	7	1937	7
0 C (32 F): Frost days (min	23	76	1933	61
-10 C (14 F): Days with min	2	5	1937	5
20 C (68 F): Tropical nights (min	23	35	1931	8
25 C (77 F): Days with min	3	2	1933	1
10 mm (0.39 in): Days with 10 mm or more rain	20	15	1941	10
25 mm (0.98 in): Days with 25 mm or more rain	16	5	1943	3
50 mm (1.97 in): Days with 50 mm or more rain	2	4	1943	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1944	1
10 cm (3.9 in): Days with 10 cm or more snowfall	1	1	1917	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1917.

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 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Llano Threshold Days by Year (USC00045001)

Key Facts for Llano Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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