Vallecito Dam Threshold Days by Year (USC00058582)

13 fixed thresholds counted per year at Vallecito Dam (USC00058582): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Vallecito Dam Thresholds

Vallecito Dam: days with a maximum temperature at or below 0 C (32 F) in 82 years, most in 1990 with 56.
Vallecito Dam: nights with a minimum temperature at or below 0 C (32 F) in 82 years, most in 1975 with 246.
Vallecito Dam: nights with a minimum temperature at or below -10 C (14 F) in 82 years, most in 1991 with 111.
Vallecito Dam: nights with a minimum temperature at or below -20 C (-4 F) in 78 years, most in 1964 with 32.
13 fixed thresholds have at least one qualifying day at Vallecito Dam.

Days at or above 30 C (86 F)

76 years with a qualifying day

Days per year at Vallecito Dam with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 30 in 1951.

Days at or above 30 C (86 F) per year at Vallecito Dam
Year	Days	Decade average
1943	8	12
1944	11	12
1945	13	12
1946	12	12
1947	16	12
1948	20	12
1949	4	12
1950	9	15.1
1951	30	15.1
1952	5	15.1
1953	18	15.1
1954	20	15.1
1955	6	15.1
1956	19	15.1
1957	6	15.1
1958	21	15.1
1959	17	15.1
1960	21	11.1
1961	16	11.1
1962	11	11.1
1963	15	11.1
1964	11	11.1
1966	11	11.1
1967	7	11.1
1968	6	11.1
1969	2	11.1
1970	9	11.6
1971	10	11.6
1972	17	11.6
1973	7	11.6
1974	8	11.6
1976	6	11.6
1977	18	11.6
1978	13	11.6
1979	16	11.6
1980	24	8.7
1981	18	8.7
1982	4	8.7
1983	2	8.7
1985	8	8.7
1986	4	8.7
1987	3	8.7
1988	2	8.7
1989	13	8.7
1990	2	6.7
1995	9	6.7
1996	12	6.7
1997	3	6.7
1998	12	6.7
1999	2	6.7
2001	7	11.4
2002	30	11.4
2003	25	11.4
2004	1	11.4
2005	13	11.4
2006	6	11.4
2007	9	11.4
2008	1	11.4
2009	11	11.4
2010	12	12.4
2011	9	12.4
2012	15	12.4
2013	8	12.4
2014	7	12.4
2015	7	12.4
2016	13	12.4
2017	9	12.4
2018	23	12.4
2019	21	12.4
2020	18	23.6
2021	21	23.6
2022	22	23.6
2023	25	23.6
2024	12	23.6
2025	29	23.6
2026	38	23.6

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

First to last qualifying date each year at Vallecito Dam
Year	First date	Last date
1943	1943-07-01	1943-07-31
1944	1944-07-16	1944-08-23
1945	1945-07-13	1945-09-06
1946	1946-06-30	1946-08-06
1947	1947-07-03	1947-08-03
1948	1948-07-09	1948-09-04
1949	1949-07-17	1949-08-30
1950	1950-06-27	1950-09-03
1951	1951-06-27	1951-08-19
1952	1952-07-20	1952-09-06
1953	1953-06-22	1953-08-09
1954	1954-06-18	1954-09-01
1955	1955-07-09	1955-09-03
1956	1956-06-12	1956-09-19
1957	1957-06-25	1957-07-05
1958	1958-06-23	1958-08-30
1959	1959-06-11	1959-09-09
1960	1960-06-28	1960-09-05
1961	1961-06-22	1961-08-07
1962	1962-07-10	1962-08-26
1963	1963-06-27	1963-08-01
1964	1964-06-26	1964-07-21
1966	1966-07-06	1966-08-07
1967	1967-07-01	1967-08-01
1968	1968-06-21	1968-07-21
1969	1969-08-07	1969-08-11
1970	1970-06-25	1970-08-13
1971	1971-06-23	1971-07-18
1972	1972-06-29	1972-08-12
1973	1973-06-26	1973-08-19
1974	1974-06-14	1974-07-12
1976	1976-06-27	1976-07-30
1977	1977-06-17	1977-09-08
1978	1978-07-13	1978-09-05
1979	1979-06-28	1979-08-07
1980	1980-06-29	1980-08-11
1981	1981-06-12	1981-08-12
1982	1982-07-14	1982-07-23
1983	1983-07-19	1983-08-09
1985	1985-06-08	1985-08-31
1986	1986-06-23	1986-08-19
1987	1987-07-24	1987-08-19
1988	1988-06-22	1988-07-22
1989	1989-06-19	1989-07-19
1990	1990-06-29	1990-06-30
1995	1995-07-26	1995-09-03
1996	1996-06-23	1996-08-15
1997	1997-07-15	1997-07-17
1998	1998-06-28	1998-07-21
1999	1999-07-01	1999-07-05
2001	2001-06-22	2001-07-30
2002	2002-05-31	2002-08-28
2003	2003-07-03	2003-08-22
2004	2004-07-14	2004-07-14
2005	2005-06-22	2005-07-31
2006	2006-06-06	2006-07-18
2007	2007-06-21	2007-07-19
2008	2008-08-01	2008-08-01
2009	2009-07-13	2009-08-22
2010	2010-06-06	2010-07-21
2011	2011-06-24	2011-08-17
2012	2012-06-21	2012-08-01
2013	2013-06-10	2013-07-24
2014	2014-06-30	2014-07-28
2015	2015-06-22	2015-08-17
2016	2016-06-19	2016-07-30
2017	2017-06-18	2017-09-05
2018	2018-06-14	2018-08-09
2019	2019-07-18	2019-09-07
2020	2020-06-24	2020-09-07
2021	2021-06-14	2021-09-12
2022	2022-06-09	2022-09-10
2023	2023-07-05	2023-08-18
2024	2024-06-06	2024-08-06
2025	2025-06-16	2025-08-24
2026	2026-06-17	2026-08-27

Every Fixed Threshold

Fixed thresholds at Vallecito Dam
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	76	30	1951	38
90 F (32.2 C): Days	37	11	1951	17
0 C (32 F): Ice days (max	82	56	1990	8
0 C (32 F): Frost days (min	82	246	1975	101
-10 C (14 F): Days with min	82	111	1991	15
-20 C (-4 F): Days with min	78	32	1964	2
-30 C (-22 F): Days with min	16	4	1949	1
10 mm (0.39 in): Days with 10 mm or more rain	76	33	1957	11
25 mm (0.98 in): Days with 25 mm or more rain	75	10	1980	1
50 mm (1.97 in): Days with 50 mm or more rain	22	2	1943	1
10 cm (3.9 in): Days with 10 cm or more snowfall	72	27	1979	2
25 cm (9.8 in): Days with 25 cm or more snowfall	52	6	1980	2
50 cm (19.7 in): Days with 50 cm or more snowfall	11	1	1943	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1943.

Download the Data

Data for Vallecito 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).

Vallecito Dam Threshold Days by Year (USC00058582)

Key Facts for Vallecito Dam Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

Related