Anchorage Threshold Days by Year (USC00150155)

19 fixed thresholds counted per year at Anchorage (USC00150155): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Anchorage Thresholds

Anchorage: days with a maximum temperature at or above 30 C (86 F) in 72 years, most in 1922 with 108.
Anchorage: days with a maximum temperature at or above 90 F (32.2 C) in 72 years, most in 1921 with 77.
Anchorage: days with a maximum temperature at or below 0 C (32 F) in 72 years, most in 1977 with 34.
Anchorage: nights with a minimum temperature at or below 0 C (32 F) in 72 years, most in 1917 with 132.
19 fixed thresholds have at least one qualifying day at Anchorage.

Days at or above 30 C (86 F)

72 years with a qualifying day

Days per year at Anchorage with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 108 in 1922.

Days at or above 30 C (86 F) per year at Anchorage
Year	Days	Decade average
1901	83	68.8
1902	64	68.8
1903	73	68.8
1904	71	68.8
1905	63	68.8
1906	85	68.8
1907	58	68.8
1909	53	68.8
1910	41	70.6
1911	71	70.6
1912	48	70.6
1913	94	70.6
1914	93	70.6
1915	56	70.6
1916	81	70.6
1917	62	70.6
1918	67	70.6
1919	93	70.6
1920	73	77.5
1921	100	77.5
1922	108	77.5
1923	73	77.5
1924	62	77.5
1925	98	77.5
1926	83	77.5
1927	63	77.5
1928	55	77.5
1929	60	77.5
1930	81	67.6
1931	76	67.6
1932	47	67.6
1933	63	67.6
1934	67	67.6
1935	48	67.6
1936	96	67.6
1937	78	67.6
1938	58	67.6
1939	62	67.6
1940	48	67.9
1941	86	67.9
1942	53	67.9
1943	58	67.9
1944	97	67.9
1945	64	67.9
1946	61	67.9
1947	69	67.9
1948	73	67.9
1949	70	67.9
1950	25	64.5
1951	65	64.5
1952	86	64.5
1953	92	64.5
1954	92	64.5
1955	75	64.5
1956	49	64.5
1957	53	64.5
1958	33	64.5
1959	75	64.5
1960	49	49
1961	40	49
1965	53	49
1966	61	49
1967	35	49
1968	56	49
1970	80	50.7
1971	62	50.7
1972	54	50.7
1973	46	50.7
1974	28	50.7
1976	31	50.7
1977	54	50.7
1981	44	44

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

First to last qualifying date each year at Anchorage
Year	First date	Last date
1901	1901-05-01	1901-09-26
1902	1902-04-25	1902-09-21
1903	1903-05-16	1903-10-04
1904	1904-05-22	1904-10-09
1905	1905-05-10	1905-10-08
1906	1906-04-27	1906-09-21
1907	1907-03-21	1907-10-03
1909	1909-06-07	1909-09-22
1910	1910-03-24	1910-10-03
1911	1911-05-15	1911-09-23
1912	1912-05-27	1912-10-11
1913	1913-05-02	1913-10-10
1914	1914-05-11	1914-10-07
1915	1915-04-20	1915-09-26
1916	1916-05-06	1916-10-08
1917	1917-05-19	1917-09-15
1918	1918-05-22	1918-10-05
1919	1919-05-29	1919-10-10
1920	1920-05-23	1920-10-23
1921	1921-04-25	1921-09-29
1922	1922-05-09	1922-10-06
1923	1923-05-19	1923-09-29
1924	1924-05-06	1924-09-21
1925	1925-04-22	1925-09-30
1926	1926-05-01	1926-10-04
1927	1927-05-09	1927-10-06
1928	1928-05-03	1928-10-16
1929	1929-03-24	1929-09-06
1930	1930-04-11	1930-10-12
1931	1931-05-17	1931-10-04
1932	1932-06-06	1932-09-19
1933	1933-05-20	1933-09-26
1934	1934-04-04	1934-08-19
1935	1935-04-26	1935-10-13
1936	1936-05-06	1936-09-22
1937	1937-05-21	1937-10-06
1938	1938-06-11	1938-10-18
1939	1939-05-24	1939-10-09
1940	1940-05-07	1940-10-26
1941	1941-05-20	1941-10-07
1942	1942-04-30	1942-09-19
1943	1943-05-05	1943-09-01
1944	1944-05-11	1944-10-04
1945	1945-06-13	1945-09-28
1946	1946-04-02	1946-10-07
1947	1947-05-15	1947-10-23
1948	1948-04-24	1948-09-21
1949	1949-05-04	1949-10-11
1950	1950-05-04	1950-09-01
1951	1951-04-28	1951-10-05
1952	1952-05-02	1952-10-01
1953	1953-05-22	1953-10-22
1954	1954-05-31	1954-10-05
1955	1955-06-05	1955-09-29
1956	1956-05-12	1956-10-16
1957	1957-04-21	1957-09-11
1958	1958-06-04	1958-09-26
1959	1959-05-02	1959-10-05
1960	1960-04-23	1960-09-23
1961	1961-06-01	1961-09-24
1965	1965-05-08	1965-09-21
1966	1966-05-08	1966-09-04
1967	1967-05-25	1967-09-20
1968	1968-06-06	1968-09-23
1970	1970-04-29	1970-09-24
1971	1971-05-17	1971-10-01
1972	1972-05-25	1972-09-21
1973	1973-06-03	1973-08-31
1974	1974-05-17	1974-08-26
1976	1976-06-07	1976-09-08
1977	1977-04-18	1977-09-17
1981	1981-04-27	1981-09-30

Every Fixed Threshold

Fixed thresholds at Anchorage
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	72	108	1922	44
35 C (95 F): Days	58	35	1913	1
40 C (104 F): Days	8	7	1930	1
90 F (32.2 C): Days	72	77	1921	11
100 F (37.8 C): Days	18	15	1930	7
110 F (43.3 C): Days	1	1	1930	1
0 C (32 F): Ice days (max	72	34	1977	17
0 C (32 F): Frost days (min	72	132	1917	105
-10 C (14 F): Days with min	72	39	1917	21
-20 C (-4 F): Days with min	43	10	1936	1
-30 C (-22 F): Days with min	2	1	1912	1
20 C (68 F): Tropical nights (min	72	49	1936	36
25 C (77 F): Days with min	6	5	1936	1
10 mm (0.39 in): Days with 10 mm or more rain	72	58	1973	34
25 mm (0.98 in): Days with 25 mm or more rain	72	23	1950	11
50 mm (1.97 in): Days with 50 mm or more rain	65	7	1910	1
100 mm (3.94 in): Days with 100 mm or more rain	9	2	1937	1
10 cm (3.9 in): Days with 10 cm or more snowfall	14	3	1951	2
25 cm (9.8 in): Days with 25 cm or more snowfall	2	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 1901.

Download the Data

Data for Anchorage 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).

Anchorage Threshold Days by Year (USC00150155)

Key Facts for Anchorage Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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