Adaven Threshold Days by Year (USC00260046)

17 fixed thresholds counted per year at Adaven (USC00260046): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Adaven Thresholds

Adaven: days with a maximum temperature at or above 30 C (86 F) in 59 years, most in 1919 with 79.
Adaven: days with a maximum temperature at or above 90 F (32.2 C) in 59 years, most in 1919 with 53.
Adaven: days with a maximum temperature at or below 0 C (32 F) in 56 years, most in 1949 with 42.
Adaven: nights with a minimum temperature at or below 0 C (32 F) in 56 years, most in 1923 with 220.
17 fixed thresholds have at least one qualifying day at Adaven.

Days at or above 30 C (86 F)

59 years with a qualifying day

Days per year at Adaven with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 79 in 1919.

Days at or above 30 C (86 F) per year at Adaven
Year	Days	Decade average
1915	35	49.7
1916	35	49.7
1919	79	49.7
1920	60	48.9
1921	55	48.9
1922	46	48.9
1923	34	48.9
1924	62	48.9
1925	32	48.9
1926	54	48.9
1927	49	48.9
1928	54	48.9
1929	43	48.9
1930	39	49.6
1931	57	49.6
1932	66	49.6
1933	61	49.6
1934	55	49.6
1935	45	49.6
1936	47	49.6
1937	54	49.6
1938	29	49.6
1939	43	49.6
1940	63	38
1941	17	38
1942	53	38
1943	30	38
1944	43	38
1945	22	38
1946	24	38
1947	36	38
1948	54	38
1949	38	38
1950	48	51.8
1951	55	51.8
1952	45	51.8
1953	47	51.8
1954	37	51.8
1955	35	51.8
1956	57	51.8
1958	68	51.8
1959	74	51.8
1960	76	54.9
1961	58	54.9
1962	66	54.9
1963	49	54.9
1964	52	54.9
1965	30	54.9
1966	61	54.9
1967	54	54.9
1968	48	54.9
1969	55	54.9
1970	44	43.3
1973	44	43.3
1974	57	43.3
1975	33	43.3
1976	33	43.3
1977	48	43.3
1978	44	43.3

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

First to last qualifying date each year at Adaven
Year	First date	Last date
1915	1915-06-29	1915-09-01
1916	1916-06-08	1916-09-15
1919	1919-06-24	1919-09-19
1920	1920-06-09	1920-08-21
1921	1921-06-09	1921-09-27
1922	1922-06-17	1922-09-19
1923	1923-06-11	1923-09-10
1924	1924-06-02	1924-09-15
1925	1925-06-19	1925-08-21
1926	1926-05-31	1926-08-26
1927	1927-05-15	1927-09-20
1928	1928-05-28	1928-09-17
1929	1929-06-20	1929-09-14
1930	1930-06-07	1930-08-31
1931	1931-05-31	1931-08-28
1932	1932-06-21	1932-09-17
1933	1933-06-11	1933-09-29
1934	1934-05-11	1934-09-07
1935	1935-06-07	1935-09-19
1936	1936-06-11	1936-09-22
1937	1937-06-19	1937-09-17
1938	1938-06-24	1938-08-21
1939	1939-06-10	1939-08-29
1940	1940-06-11	1940-08-31
1941	1941-07-04	1941-07-23
1942	1942-01-01	1942-08-27
1943	1943-07-04	1943-09-07
1944	1944-06-29	1944-09-11
1945	1945-06-20	1945-07-31
1946	1946-06-27	1946-08-18
1947	1947-05-02	1947-09-15
1948	1948-06-28	1948-09-14
1949	1949-06-13	1949-09-22
1950	1950-05-26	1950-09-06
1951	1951-05-25	1951-09-20
1952	1952-07-02	1952-09-18
1953	1953-06-21	1953-09-14
1954	1954-05-19	1954-08-31
1955	1955-06-07	1955-09-11
1956	1956-06-02	1956-09-18
1958	1958-05-19	1958-09-20
1959	1959-06-05	1959-09-10
1960	1960-05-31	1960-09-26
1961	1961-06-13	1961-08-19
1962	1962-06-09	1962-09-19
1963	1963-07-01	1963-09-28
1964	1964-06-24	1964-10-05
1965	1965-06-22	1965-09-15
1966	1966-05-25	1966-09-25
1967	1967-05-22	1967-09-27
1968	1968-05-28	1968-09-10
1969	1969-05-29	1969-09-10
1970	1970-06-03	1970-09-01
1973	1973-06-07	1973-08-20
1974	1974-05-11	1974-09-10
1975	1975-06-13	1975-08-12
1976	1976-06-18	1976-09-04
1977	1977-06-04	1977-09-07
1978	1978-06-07	1978-09-03

Every Fixed Threshold

Fixed thresholds at Adaven
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	59	79	1919	44
35 C (95 F): Days	40	19	1960	7
40 C (104 F): Days	1	1	1923	1
90 F (32.2 C): Days	59	53	1919	24
100 F (37.8 C): Days	4	2	1925	1
0 C (32 F): Ice days (max	56	42	1949	11
0 C (32 F): Frost days (min	56	220	1923	159
-10 C (14 F): Days with min	56	59	1932	19
-20 C (-4 F): Days with min	24	20	1937	2
-30 C (-22 F): Days with min	1	1	1933	1
20 C (68 F): Tropical nights (min	3	2	1920	1
10 mm (0.39 in): Days with 10 mm or more rain	54	21	1938	19
25 mm (0.98 in): Days with 25 mm or more rain	47	7	1978	7
50 mm (1.97 in): Days with 50 mm or more rain	10	1	1915	1
10 cm (3.9 in): Days with 10 cm or more snowfall	43	11	1952	4
25 cm (9.8 in): Days with 25 cm or more snowfall	23	3	1945	1
50 cm (19.7 in): Days with 50 cm or more snowfall	1	1	1946	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1915.

Download the Data

Data for Adaven 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).

Adaven Threshold Days by Year (USC00260046)

Key Facts for Adaven Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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