Alpine Threshold Days by Year (USC00410174)

15 fixed thresholds counted per year at Alpine (USC00410174): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Alpine Thresholds

Alpine: days with 10 mm (0.39 in) or more of precipitation in 82 years, most in 1941 with 30.
Alpine: days with 25 mm (0.98 in) or more of precipitation in 79 years, most in 1941 with 12.
Alpine: nights with a minimum temperature at or below 0 C (32 F) in 76 years, most in 1960 with 89.
Alpine: nights with a minimum temperature at or above 20 C (68 F) in 76 years, most in 1953 with 67.
15 fixed thresholds have at least one qualifying day at Alpine.

Days at or above 30 C (86 F)

71 years with a qualifying day

Days per year at Alpine with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 164 in 2011.

Days at or above 30 C (86 F) per year at Alpine
Year	Days	Decade average
1930	132	127
1931	148	127
1932	131	127
1933	142	127
1934	147	127
1935	148	127
1936	115	127
1937	110	127
1938	94	127
1939	103	127
1940	94	100.6
1941	64	100.6
1942	90	100.6
1943	121	100.6
1944	99	100.6
1945	112	100.6
1946	101	100.6
1948	118	100.6
1949	106	100.6
1950	112	121.4
1951	128	121.4
1952	118	121.4
1953	118	121.4
1954	127	121.4
1955	125	121.4
1956	137	121.4
1957	104	121.4
1959	124	121.4
1960	117	102.9
1961	119	102.9
1964	108	102.9
1965	113	102.9
1966	89	102.9
1967	81	102.9
1968	84	102.9
1969	112	102.9
1970	100	102.5
1971	103	102.5
1972	106	102.5
1973	89	102.5
1974	98	102.5
1975	102	102.5
1976	73	102.5
1977	136	102.5
1978	110	102.5
1979	108	102.5
1980	118	94.8
1981	85	94.8
1987	74	94.8
1988	81	94.8
1989	116	94.8
1990	76	101.9
1991	68	101.9
1992	87	101.9
1996	114	101.9
1997	112	101.9
1998	143	101.9
1999	113	101.9
2000	149	131.5
2001	122	131.5
2002	137	131.5
2009	118	131.5
2010	121	142.7
2011	164	142.7
2012	154	142.7
2013	134	142.7
2014	162	142.7
2015	161	142.7
2016	108	142.7
2017	140	142.7
2018	140	142.7

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

First to last qualifying date each year at Alpine
Year	First date	Last date
1930	1930-04-07	1930-10-09
1931	1931-04-07	1931-10-29
1932	1932-02-09	1932-10-24
1933	1933-03-11	1933-10-31
1934	1934-03-06	1934-11-08
1935	1935-03-22	1935-10-22
1936	1936-03-30	1936-09-10
1937	1937-04-14	1937-10-06
1938	1938-03-25	1938-10-18
1939	1939-04-03	1939-10-06
1940	1940-03-31	1940-10-09
1941	1941-04-12	1941-10-09
1942	1942-05-04	1942-09-18
1943	1943-04-04	1943-09-19
1944	1944-04-21	1944-10-06
1945	1945-04-09	1945-09-27
1946	1946-03-30	1946-09-27
1948	1948-04-11	1948-10-16
1949	1949-04-27	1949-10-10
1950	1950-04-09	1950-10-29
1951	1951-04-25	1951-10-16
1952	1952-05-05	1952-10-18
1953	1953-04-23	1953-10-17
1954	1954-03-23	1954-10-14
1955	1955-04-17	1955-10-19
1956	1956-04-26	1956-10-25
1957	1957-05-16	1957-10-05
1959	1959-04-07	1959-10-26
1960	1960-03-09	1960-10-16
1961	1961-04-18	1961-11-27
1964	1964-04-17	1964-10-17
1965	1965-04-10	1965-10-15
1966	1966-03-20	1966-09-27
1967	1967-03-12	1967-10-06
1968	1968-04-16	1968-10-14
1969	1969-04-22	1969-10-10
1970	1970-04-21	1970-09-25
1971	1971-03-24	1971-09-29
1972	1972-04-06	1972-10-18
1973	1973-04-15	1973-11-08
1974	1974-03-02	1974-09-12
1975	1975-04-16	1975-10-31
1976	1976-04-22	1976-09-12
1977	1977-04-28	1977-10-05
1978	1978-03-31	1978-10-10
1979	1979-04-15	1979-10-27
1980	1980-04-10	1980-09-22
1981	1981-04-12	1981-09-27
1987	1987-04-16	1987-10-09
1988	1988-04-20	1988-11-04
1989	1989-03-11	1989-10-15
1990	1990-04-13	1990-09-07
1991	1991-04-21	1991-10-19
1992	1992-04-16	1992-10-14
1996	1996-04-21	1996-09-23
1997	1997-05-01	1997-10-04
1998	1998-03-24	1998-10-16
1999	1999-04-07	1999-10-16
2000	2000-04-06	2000-10-06
2001	2001-04-02	2001-10-22
2002	2002-04-11	2002-10-12
2009	2009-03-04	2009-10-15
2010	2010-03-31	2010-10-11
2011	2011-03-18	2011-10-26
2012	2012-03-24	2012-10-31
2013	2013-03-17	2013-10-12
2014	2014-02-16	2014-10-31
2015	2015-03-24	2015-11-26
2016	2016-03-30	2016-10-20
2017	2017-02-12	2017-11-18
2018	2018-03-22	2018-10-06

Every Fixed Threshold

Fixed thresholds at Alpine
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	71	164	2011	140
35 C (95 F): Days	70	88	2015	63
40 C (104 F): Days	18	10	2014	8
90 F (32.2 C): Days	71	135	2015	103
100 F (37.8 C): Days	49	31	2014	20
0 C (32 F): Ice days (max	42	6	1949	3
0 C (32 F): Frost days (min	76	89	1960	63
-10 C (14 F): Days with min	54	8	1930	2
20 C (68 F): Tropical nights (min	76	67	1953	18
25 C (77 F): Days with min	5	2	1951	1
10 mm (0.39 in): Days with 10 mm or more rain	82	30	1941	14
25 mm (0.98 in): Days with 25 mm or more rain	79	12	1941	3
50 mm (1.97 in): Days with 50 mm or more rain	24	3	1989	2
10 cm (3.9 in): Days with 10 cm or more snowfall	17	4	1946	1
25 cm (9.8 in): Days with 25 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 1930.

Download the Data

Data for Alpine 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).

Alpine Threshold Days by Year (USC00410174)

Key Facts for Alpine Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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