Long Valley Threshold Days by Year (USC00285003)

17 fixed thresholds counted per year at Long Valley (USC00285003): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Long Valley Thresholds

Long Valley: days with 10 mm (0.39 in) or more of precipitation in 67 years, most in 1975 with 59.
Long Valley: days with 25 mm (0.98 in) or more of precipitation in 67 years, most in 1983 with 26.
Long Valley: days with a maximum temperature at or above 30 C (86 F) in 64 years, most in 1959 with 56.
Long Valley: days with a maximum temperature at or below 0 C (32 F) in 64 years, most in 1978 with 58.
17 fixed thresholds have at least one qualifying day at Long Valley.

Days at or above 30 C (86 F)

64 years with a qualifying day

Days per year at Long Valley with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 56 in 1959.

Days at or above 30 C (86 F) per year at Long Valley
Year	Days	Decade average
1933	30	34.7
1934	28	34.7
1937	46	34.7
1940	22	36.5
1941	48	36.5
1942	31	36.5
1943	47	36.5
1944	55	36.5
1945	27	36.5
1946	30	36.5
1947	34	36.5
1948	27	36.5
1949	44	36.5
1951	26	37.1
1952	37	37.1
1953	42	37.1
1954	31	37.1
1955	50	37.1
1956	25	37.1
1957	41	37.1
1958	26	37.1
1959	56	37.1
1960	22	24.8
1961	41	24.8
1962	31	24.8
1964	33	24.8
1966	31	24.8
1967	7	24.8
1968	23	24.8
1969	10	24.8
1970	19	14.3
1971	10	14.3
1972	15	14.3
1973	23	14.3
1974	15	14.3
1975	15	14.3
1976	20	14.3
1977	14	14.3
1978	3	14.3
1979	9	14.3
1980	35	24.3
1981	12	24.3
1982	12	24.3
1983	48	24.3
1984	22	24.3
1985	13	24.3
1986	16	24.3
1987	31	24.3
1988	40	24.3
1989	14	24.3
1990	14	16.6
1991	35	16.6
1992	5	16.6
1993	30	16.6
1994	13	16.6
1995	21	16.6
1996	5	16.6
1997	12	16.6
1998	6	16.6
1999	25	16.6
2000	7	13.5
2001	11	13.5
2002	30	13.5
2003	6	13.5

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

First to last qualifying date each year at Long Valley
Year	First date	Last date
1933	1933-05-27	1933-08-27
1934	1934-05-06	1934-08-24
1937	1937-05-22	1937-09-04
1940	1940-06-04	1940-09-21
1941	1941-04-14	1941-10-06
1942	1942-04-26	1942-09-17
1943	1943-05-08	1943-09-07
1944	1944-05-05	1944-09-06
1945	1945-06-14	1945-09-25
1946	1946-05-26	1946-10-07
1947	1947-06-11	1947-10-15
1948	1948-05-11	1948-09-19
1949	1949-05-06	1949-10-11
1951	1951-05-17	1951-09-13
1952	1952-06-16	1952-09-14
1953	1953-05-12	1953-09-06
1954	1954-06-12	1954-09-07
1955	1955-05-05	1955-08-22
1956	1956-05-13	1956-08-29
1957	1957-05-10	1957-09-13
1958	1958-06-26	1958-10-10
1959	1959-05-07	1959-10-06
1960	1960-04-23	1960-09-01
1961	1961-06-02	1961-09-24
1962	1962-04-27	1962-09-01
1964	1964-05-10	1964-09-24
1966	1966-06-06	1966-09-03
1967	1967-06-11	1967-07-25
1968	1968-06-07	1968-08-26
1969	1969-05-30	1969-08-26
1970	1970-05-11	1970-09-26
1971	1971-06-08	1971-09-10
1972	1972-07-12	1972-09-18
1973	1973-06-05	1973-09-05
1974	1974-04-30	1974-08-15
1975	1975-05-21	1975-10-15
1976	1976-04-18	1976-09-15
1977	1977-04-13	1977-07-22
1978	1978-07-22	1978-07-24
1979	1979-05-10	1979-10-23
1980	1980-05-06	1980-09-23
1981	1981-06-17	1981-08-12
1982	1982-07-09	1982-07-27
1983	1983-06-04	1983-09-21
1984	1984-05-23	1984-08-09
1985	1985-04-22	1985-09-08
1986	1986-05-07	1986-07-27
1987	1987-05-11	1987-08-18
1988	1988-05-31	1988-08-16
1989	1989-06-02	1989-09-11
1990	1990-04-27	1990-08-05
1991	1991-04-09	1991-09-19
1992	1992-05-23	1992-08-28
1993	1993-05-12	1993-09-04
1994	1994-04-28	1994-07-22
1995	1995-06-20	1995-09-01
1996	1996-05-20	1996-07-09
1997	1997-06-12	1997-08-17
1998	1998-04-01	1998-07-30
1999	1999-06-08	1999-08-14
2000	2000-05-08	2000-06-26
2001	2001-05-03	2001-08-11
2002	2002-04-17	2002-09-11
2003	2003-06-25	2003-08-23

Every Fixed Threshold

Fixed thresholds at Long Valley
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	64	56	1959	6
35 C (95 F): Days	25	14	1955	3
90 F (32.2 C): Days	62	33	1944	1
100 F (37.8 C): Days	5	2	1953	2
0 C (32 F): Ice days (max	64	58	1978	43
0 C (32 F): Frost days (min	61	175	1978	126
-10 C (14 F): Days with min	61	62	1978	35
-20 C (-4 F): Days with min	33	10	1961	4
-30 C (-22 F): Days with min	2	1	1943	1
20 C (68 F): Tropical nights (min	51	25	1999	20
10 mm (0.39 in): Days with 10 mm or more rain	67	59	1975	47
25 mm (0.98 in): Days with 25 mm or more rain	67	26	1983	24
50 mm (1.97 in): Days with 50 mm or more rain	58	8	1984	3
100 mm (3.94 in): Days with 100 mm or more rain	8	2	1972	1
10 cm (3.9 in): Days with 10 cm or more snowfall	63	8	1966	5
25 cm (9.8 in): Days with 25 cm or more snowfall	24	2	1947	1
50 cm (19.7 in): Days with 50 cm or more snowfall	3	1	1947	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1933.

Download the Data

Data for Long Valley 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).

Long Valley Threshold Days by Year (USC00285003)

Key Facts for Long Valley Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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