Shasta Dam Threshold Days by Year (USC00048135)

20 fixed thresholds counted per year at Shasta Dam (USC00048135): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Shasta Dam Thresholds

Shasta Dam: days with 10 mm (0.39 in) or more of precipitation in 83 years, most in 1983 with 88.
Shasta Dam: days with 25 mm (0.98 in) or more of precipitation in 83 years, most in 1983 with 52.
Shasta Dam: days with 50 mm (1.97 in) or more of precipitation in 82 years, most in 1983 with 17.
Shasta Dam: days with a maximum temperature at or above 30 C (86 F) in 78 years, most in 2015 with 129.
20 fixed thresholds have at least one qualifying day at Shasta Dam.

Days at or above 30 C (86 F)

78 years with a qualifying day

Days per year at Shasta Dam with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 129 in 2015.

Days at or above 30 C (86 F) per year at Shasta Dam
Year	Days	Decade average
1944	116	110
1945	125	110
1946	104	110
1947	117	110
1948	86	110
1949	112	110
1950	112	100.8
1951	116	100.8
1952	99	100.8
1953	85	100.8
1954	78	100.8
1955	99	100.8
1956	108	100.8
1957	104	100.8
1958	109	100.8
1959	98	100.8
1960	113	98.2
1961	98	98.2
1962	101	98.2
1963	83	98.2
1964	96	98.2
1965	84	98.2
1966	101	98.2
1967	114	98.2
1968	90	98.2
1969	102	98.2
1970	108	101.8
1971	92	101.8
1972	102	101.8
1973	97	101.8
1974	118	101.8
1975	108	101.8
1976	96	101.8
1977	94	101.8
1978	93	101.8
1979	110	101.8
1980	97	103.1
1981	109	103.1
1982	87	103.1
1983	84	103.1
1984	107	103.1
1985	119	103.1
1987	120	103.1
1989	102	103.1
1990	91	102.4
1991	117	102.4
1992	122	102.4
1993	90	102.4
1994	109	102.4
1995	93	102.4
1996	109	102.4
1997	96	102.4
1998	87	102.4
1999	110	102.4
2000	102	113.6
2001	124	113.6
2002	118	113.6
2003	121	113.6
2004	108	113.6
2006	118	113.6
2007	106	113.6
2008	107	113.6
2009	118	113.6
2010	94	114.6
2011	94	114.6
2012	123	114.6
2013	111	114.6
2014	128	114.6
2015	129	114.6
2016	121	114.6
2017	122	114.6
2019	109	114.6
2020	131	122.8
2021	127	122.8
2022	128	122.8
2023	114	122.8
2024	128	122.8
2026	109	122.8

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

First to last qualifying date each year at Shasta Dam
Year	First date	Last date
1944	1944-05-02	1944-10-25
1945	1945-04-15	1945-10-14
1946	1946-04-17	1946-10-12
1947	1947-03-16	1947-10-05
1948	1948-05-23	1948-09-14
1949	1949-04-14	1949-11-04
1950	1950-04-19	1950-10-12
1951	1951-04-09	1951-10-10
1952	1952-05-18	1952-10-15
1953	1953-05-05	1953-10-09
1954	1954-04-17	1954-09-28
1955	1955-05-06	1955-10-17
1956	1956-04-20	1956-10-07
1957	1957-04-29	1957-09-25
1958	1958-05-09	1958-10-17
1959	1959-05-12	1959-10-24
1960	1960-05-30	1960-10-19
1961	1961-04-03	1961-10-16
1962	1962-04-12	1962-09-26
1963	1963-05-17	1963-10-04
1964	1964-04-15	1964-10-23
1965	1965-05-11	1965-10-25
1966	1966-04-01	1966-11-02
1967	1967-05-08	1967-09-29
1968	1968-05-03	1968-10-03
1969	1969-05-07	1969-10-02
1970	1970-05-04	1970-10-03
1971	1971-05-11	1971-10-14
1972	1972-05-04	1972-10-04
1973	1973-04-26	1973-09-29
1974	1974-05-05	1974-10-19
1975	1975-05-13	1975-10-05
1976	1976-05-01	1976-10-14
1977	1977-04-16	1977-10-18
1978	1978-05-20	1978-10-24
1979	1979-05-13	1979-10-11
1980	1980-05-18	1980-10-10
1981	1981-04-29	1981-10-02
1982	1982-05-17	1982-10-13
1983	1983-05-20	1983-09-21
1984	1984-05-14	1984-10-24
1985	1985-04-02	1985-10-16
1987	1987-04-22	1987-10-19
1989	1989-04-07	1989-10-09
1990	1990-04-04	1990-10-05
1991	1991-05-22	1991-10-21
1992	1992-04-02	1992-10-14
1993	1993-05-10	1993-10-04
1994	1994-04-16	1994-10-08
1995	1995-05-26	1995-10-15
1996	1996-04-30	1996-10-10
1997	1997-05-08	1997-09-30
1998	1998-04-28	1998-09-30
1999	1999-04-25	1999-10-14
2000	2000-04-03	2000-10-08
2001	2001-04-25	2001-10-15
2002	2002-04-01	2002-10-18
2003	2003-05-21	2003-10-29
2004	2004-04-27	2004-10-16
2006	2006-04-28	2006-10-13
2007	2007-04-06	2007-09-27
2008	2008-06-09	2008-10-27
2009	2009-04-20	2009-10-03
2010	2010-06-13	2010-10-14
2011	2011-05-05	2011-09-30
2012	2012-04-21	2012-10-19
2013	2013-04-28	2013-10-22
2014	2014-04-30	2014-10-12
2015	2015-03-30	2015-10-17
2016	2016-04-07	2016-10-09
2017	2017-05-02	2017-10-31
2019	2019-04-19	2019-10-08
2020	2020-04-27	2020-10-21
2021	2021-04-19	2021-10-05
2022	2022-04-08	2022-10-21
2023	2023-04-27	2023-10-21
2024	2024-05-11	2024-10-10
2026	2026-03-17	2026-10-10

Every Fixed Threshold

Fixed thresholds at Shasta Dam
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	78	129	2015	109
35 C (95 F): Days	78	85	2017	67
40 C (104 F): Days	71	48	2021	7
45 C (113 F): Days	9	3	2021	2
90 F (32.2 C): Days	78	111	2024	90
100 F (37.8 C): Days	78	65	2021	26
110 F (43.3 C): Days	28	7	2024	7
0 C (32 F): Ice days (max	4	2	1972	1
0 C (32 F): Frost days (min	74	29	1949	6
-10 C (14 F): Days with min	1	2	1990	2
20 C (68 F): Tropical nights (min	78	73	2022	49
25 C (77 F): Days with min	57	10	2024	2
10 mm (0.39 in): Days with 10 mm or more rain	83	88	1983	26
25 mm (0.98 in): Days with 25 mm or more rain	83	52	1983	15
50 mm (1.97 in): Days with 50 mm or more rain	82	17	1983	2
100 mm (3.94 in): Days with 100 mm or more rain	57	7	2002	3
200 mm (7.87 in): Days with 200 mm or more rain	4	1	1955	1
10 cm (3.9 in): Days with 10 cm or more snowfall	15	5	1950	1
25 cm (9.8 in): Days with 25 cm or more snowfall	5	2	1950	1
50 cm (19.7 in): Days with 50 cm or more snowfall	2	2	1952	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1944.

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Data for Shasta Dam 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).

Shasta Dam Threshold Days by Year (USC00048135)

Key Facts for Shasta Dam Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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