Armour Threshold Days by Year (USC00390296)

21 fixed thresholds counted per year at Armour (USC00390296): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Armour Thresholds

Armour: days with 10 mm (0.39 in) or more of precipitation in 99 years, most in 1915 with 30.
Armour: days with 25 mm (0.98 in) or more of precipitation in 99 years, most in 1962 with 11.
Armour: nights with a minimum temperature at or below 0 C (32 F) in 94 years, most in 1908 with 194.
Armour: nights with a minimum temperature at or below -10 C (14 F) in 94 years, most in 1955 with 92.
21 fixed thresholds have at least one qualifying day at Armour.

Days at or above 30 C (86 F)

92 years with a qualifying day

Days per year at Armour with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 128 in 1939.

Days at or above 30 C (86 F) per year at Armour
Year	Days	Decade average
1899	71	71
1900	70	61.6
1902	50	61.6
1903	47	61.6
1904	68	61.6
1905	70	61.6
1906	60	61.6
1907	54	61.6
1908	74	61.6
1915	21	55.4
1916	66	55.4
1917	57	55.4
1918	66	55.4
1919	67	55.4
1920	52	60.3
1921	67	60.3
1922	65	60.3
1923	53	60.3
1924	42	60.3
1925	71	60.3
1926	70	60.3
1927	57	60.3
1929	66	60.3
1930	67	92.7
1931	100	92.7
1932	86	92.7
1933	86	92.7
1934	91	92.7
1935	65	92.7
1936	103	92.7
1937	91	92.7
1938	110	92.7
1939	128	92.7
1940	98	71.8
1941	96	71.8
1942	62	71.8
1943	74	71.8
1944	62	71.8
1945	55	71.8
1946	55	71.8
1947	73	71.8
1948	70	71.8
1949	73	71.8
1950	35	63.2
1951	29	63.2
1952	74	63.2
1953	65	63.2
1954	55	63.2
1955	89	63.2
1956	86	63.2
1957	56	63.2
1958	63	63.2
1959	80	63.2
1960	52	55
1961	60	55
1962	39	55
1963	71	55
1964	59	55
1965	46	55
1966	65	55
1967	53	55
1968	61	55
1969	44	55
1970	74	62.7
1971	59	62.7
1972	45	62.7
1973	60	62.7
1975	61	62.7
1976	74	62.7
1977	65	62.7
1978	66	62.7
1979	60	62.7
1981	55	68.5
1982	54	68.5
1983	78	68.5
1984	61	68.5
1988	87	68.5
1989	76	68.5
1990	75	55.4
1991	80	55.4
1992	23	55.4
1993	22	55.4
1994	67	55.4
1995	66	55.4
1996	50	55.4
1997	57	55.4
1998	65	55.4
1999	49	55.4
2000	73	69
2001	65	69
2002	74	69
2003	64	69

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

First to last qualifying date each year at Armour
Year	First date	Last date
1899	1899-04-12	1899-09-23
1900	1900-05-11	1900-10-12
1902	1902-04-20	1902-10-18
1903	1903-06-06	1903-10-21
1904	1904-04-28	1904-10-03
1905	1905-06-01	1905-10-08
1906	1906-04-24	1906-10-12
1907	1907-06-04	1907-10-06
1908	1908-04-12	1908-10-14
1915	1915-04-16	1915-09-19
1916	1916-05-05	1916-10-03
1917	1917-04-10	1917-09-23
1918	1918-05-03	1918-10-16
1919	1919-05-27	1919-10-01
1920	1920-06-07	1920-10-09
1921	1921-04-02	1921-09-28
1922	1922-05-09	1922-10-04
1923	1923-04-19	1923-09-05
1924	1924-04-14	1924-10-01
1925	1925-04-12	1925-09-19
1926	1926-04-20	1926-09-16
1927	1927-04-26	1927-10-26
1929	1929-04-04	1929-09-23
1930	1930-04-09	1930-10-10
1931	1931-04-11	1931-09-20
1932	1932-05-12	1932-10-02
1933	1933-05-16	1933-10-14
1934	1934-04-29	1934-10-11
1935	1935-06-09	1935-09-24
1936	1936-04-13	1936-09-25
1937	1937-05-20	1937-10-29
1938	1938-04-30	1938-10-13
1939	1939-03-22	1939-10-06
1940	1940-04-14	1940-10-26
1941	1941-05-13	1941-09-21
1942	1942-05-25	1942-10-07
1943	1943-03-29	1943-10-10
1944	1944-05-14	1944-09-18
1945	1945-05-25	1945-10-16
1946	1946-03-31	1946-09-25
1947	1947-06-24	1947-10-21
1948	1948-05-14	1948-09-18
1949	1949-04-25	1949-09-16
1950	1950-05-22	1950-10-30
1951	1951-06-16	1951-10-01
1952	1952-04-27	1952-09-30
1953	1953-04-21	1953-10-14
1954	1954-04-13	1954-09-26
1955	1955-04-19	1955-10-10
1956	1956-05-18	1956-10-12
1957	1957-05-07	1957-09-30
1958	1958-04-16	1958-10-19
1959	1959-04-30	1959-09-14
1960	1960-05-31	1960-10-11
1961	1961-05-10	1961-10-06
1962	1962-04-24	1962-09-11
1963	1963-04-01	1963-10-05
1964	1964-05-17	1964-09-25
1965	1965-04-29	1965-09-02
1966	1966-05-04	1966-09-11
1967	1967-05-17	1967-10-03
1968	1968-03-30	1968-09-21
1969	1969-05-14	1969-09-12
1970	1970-05-07	1970-10-05
1971	1971-04-15	1971-09-13
1972	1972-05-16	1972-09-20
1973	1973-05-20	1973-09-01
1975	1975-05-19	1975-10-05
1976	1976-05-19	1976-09-19
1977	1977-04-09	1977-09-09
1978	1978-05-23	1978-09-12
1979	1979-05-06	1979-09-16
1981	1981-04-25	1981-09-20
1982	1982-05-03	1982-09-11
1983	1983-05-26	1983-09-28
1984	1984-05-31	1984-09-21
1988	1988-04-07	1988-09-25
1989	1989-04-22	1989-10-01
1990	1990-04-22	1990-10-06
1991	1991-04-05	1991-10-17
1992	1992-04-30	1992-10-03
1993	1993-05-22	1993-10-07
1994	1994-04-18	1994-09-20
1995	1995-06-06	1995-09-16
1996	1996-05-17	1996-09-10
1997	1997-05-16	1997-10-03
1998	1998-05-14	1998-09-29
1999	1999-06-05	1999-10-10
2000	2000-05-04	2000-10-19
2001	2001-04-28	2001-10-03
2002	2002-05-29	2002-09-30
2003	2003-04-13	2003-10-07

Every Fixed Threshold

Fixed thresholds at Armour
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	92	128	1939	64
35 C (95 F): Days	90	69	1939	14
40 C (104 F): Days	44	29	1936	1
45 C (113 F): Days	2	2	1936	1
90 F (32.2 C): Days	92	108	1939	35
100 F (37.8 C): Days	78	42	1936	3
110 F (43.3 C): Days	10	8	1936	1
0 C (32 F): Ice days (max	92	83	1978	40
0 C (32 F): Frost days (min	94	194	1908	141
-10 C (14 F): Days with min	94	92	1955	52
-20 C (-4 F): Days with min	94	45	1916	10
-30 C (-22 F): Days with min	49	10	1899	2
-40 C (-40 F): Days with min	1	1	1905	1
20 C (68 F): Tropical nights (min	92	47	1931	8
25 C (77 F): Days with min	24	13	1931	1
10 mm (0.39 in): Days with 10 mm or more rain	99	30	1915	24
25 mm (0.98 in): Days with 25 mm or more rain	99	11	1962	12
50 mm (1.97 in): Days with 50 mm or more rain	51	3	1908	2
100 mm (3.94 in): Days with 100 mm or more rain	5	1	1937	1
10 cm (3.9 in): Days with 10 cm or more snowfall	92	9	1924	4
25 cm (9.8 in): Days with 25 cm or more snowfall	18	2	1929	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1899.

Download the Data

Data for Armour 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).

Armour Threshold Days by Year (USC00390296)

Key Facts for Armour Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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