Mt Adams Rs Threshold Days by Year (USC00455659)

18 fixed thresholds counted per year at Mt Adams Rs (USC00455659): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Mt Adams Rs Thresholds

Mt Adams Rs: nights with a minimum temperature at or below 0 C (32 F) in 65 years, most in 1935 with 196.
Mt Adams Rs: days with a maximum temperature at or above 30 C (86 F) in 61 years, most in 1938 with 68.
Mt Adams Rs: days with a maximum temperature at or above 90 F (32.2 C) in 61 years, most in 1961 with 38.
Mt Adams Rs: nights with a minimum temperature at or below -10 C (14 F) in 60 years, most in 1985 with 49.
18 fixed thresholds have at least one qualifying day at Mt Adams Rs.

Days at or above 30 C (86 F)

61 years with a qualifying day

Days per year at Mt Adams Rs with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 68 in 1938.

Days at or above 30 C (86 F) per year at Mt Adams Rs
Year	Days	Decade average
1925	39	33
1926	30	33
1927	37	33
1928	29	33
1929	30	33
1930	24	36.7
1932	21	36.7
1933	25	36.7
1934	43	36.7
1935	36	36.7
1936	29	36.7
1937	35	36.7
1938	68	36.7
1939	49	36.7
1940	41	37
1941	39	37
1942	47	37
1943	38	37
1944	27	37
1945	39	37
1949	28	37
1950	34	26.6
1951	36	26.6
1952	34	26.6
1953	19	26.6
1954	4	26.6
1955	31	26.6
1956	30	26.6
1959	25	26.6
1960	33	32.7
1961	49	32.7
1962	16	32.7
1963	31	32.7
1965	29	32.7
1969	38	32.7
1970	43	33.7
1971	39	33.7
1972	34	33.7
1973	40	33.7
1974	41	33.7
1976	24	33.7
1977	24	33.7
1978	29	33.7
1979	29	33.7
1983	29	32.9
1984	32	32.9
1985	33	32.9
1986	50	32.9
1987	39	32.9
1988	32	32.9
1989	15	32.9
1991	30	23
1993	16	23
2013	40	34.4
2014	40	34.4
2016	33	34.4
2018	41	34.4
2019	18	34.4
2020	36	41.7
2023	48	41.7
2026	41	41.7

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

First to last qualifying date each year at Mt Adams Rs
Year	First date	Last date
1925	1925-06-19	1925-09-03
1926	1926-04-27	1926-08-26
1927	1927-05-16	1927-08-22
1928	1928-05-20	1928-09-04
1929	1929-06-24	1929-09-16
1930	1930-07-08	1930-09-03
1932	1932-06-12	1932-09-15
1933	1933-06-12	1933-08-27
1934	1934-04-21	1934-09-05
1935	1935-06-04	1935-10-02
1936	1936-05-10	1936-09-07
1937	1937-05-02	1937-09-15
1938	1938-05-23	1938-09-25
1939	1939-04-20	1939-09-22
1940	1940-05-22	1940-09-11
1941	1941-05-23	1941-08-22
1942	1942-06-28	1942-09-28
1943	1943-06-27	1943-09-25
1944	1944-05-27	1944-09-11
1945	1945-06-17	1945-09-13
1949	1949-05-10	1949-09-02
1950	1950-06-28	1950-09-03
1951	1951-05-22	1951-09-18
1952	1952-07-03	1952-09-26
1953	1953-07-06	1953-09-11
1954	1954-07-13	1954-08-02
1955	1955-06-08	1955-09-07
1956	1956-05-17	1956-09-16
1959	1959-06-19	1959-08-10
1960	1960-06-28	1960-09-18
1961	1961-06-02	1961-08-23
1962	1962-07-21	1962-09-25
1963	1963-06-14	1963-09-27
1965	1965-07-02	1965-08-19
1969	1969-05-09	1969-09-12
1970	1970-06-02	1970-08-26
1971	1971-06-22	1971-08-30
1972	1972-05-28	1972-09-05
1973	1973-05-14	1973-09-11
1974	1974-06-11	1974-09-25
1976	1976-06-27	1976-09-30
1977	1977-06-07	1977-08-21
1978	1978-06-03	1978-08-29
1979	1979-06-02	1979-09-14
1983	1983-05-22	1983-08-22
1984	1984-06-25	1984-09-18
1985	1985-06-18	1985-08-27
1986	1986-05-28	1986-09-05
1987	1987-05-06	1987-09-23
1988	1988-06-15	1988-09-06
1989	1989-06-05	1989-09-15
1991	1991-06-10	1991-09-06
1993	1993-05-11	1993-09-11
2013	2013-05-10	2013-09-16
2014	2014-07-01	2014-09-22
2016	2016-06-04	2016-08-31
2018	2018-06-21	2018-09-08
2019	2019-06-12	2019-09-06
2020	2020-05-30	2020-09-11
2023	2023-05-19	2023-09-18
2026	2026-06-15	2026-08-26

Every Fixed Threshold

Fixed thresholds at Mt Adams Rs
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	61	68	1938	41
35 C (95 F): Days	53	20	1938	6
40 C (104 F): Days	5	3	1928	2
90 F (32.2 C): Days	61	38	1961	28
100 F (37.8 C): Days	15	8	1938	4
0 C (32 F): Ice days (max	59	58	1985	6
0 C (32 F): Frost days (min	65	196	1935	94
-10 C (14 F): Days with min	60	49	1985	3
-20 C (-4 F): Days with min	33	11	1949	3
-30 C (-22 F): Days with min	1	1	1927	1
20 C (68 F): Tropical nights (min	5	2	1944	1
10 mm (0.39 in): Days with 10 mm or more rain	44	61	1950	8
25 mm (0.98 in): Days with 25 mm or more rain	44	21	1934	1
50 mm (1.97 in): Days with 50 mm or more rain	30	5	1933	1
100 mm (3.94 in): Days with 100 mm or more rain	2	1	1934	1
10 cm (3.9 in): Days with 10 cm or more snowfall	52	26	1951	8
25 cm (9.8 in): Days with 25 cm or more snowfall	37	8	1969	1
50 cm (19.7 in): Days with 50 cm or more snowfall	5	2	1950	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1925.

Download the Data

Data for Mt Adams Rs 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 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Mt Adams Rs Threshold Days by Year (USC00455659)

Key Facts for Mt Adams Rs Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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