Alcove Dam Threshold Days by Year (USC00300063)

16 fixed thresholds counted per year at Alcove Dam (USC00300063): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Alcove Dam Thresholds

Alcove Dam: days with 10 mm (0.39 in) or more of precipitation in 73 years, most in 1977 with 50.
Alcove Dam: days with 25 mm (0.98 in) or more of precipitation in 73 years, most in 1983 with 23.
Alcove Dam: days with a maximum temperature at or above 30 C (86 F) in 67 years, most in 1959 with 45.
Alcove Dam: days with a maximum temperature at or below 0 C (32 F) in 67 years, most in 1970 with 68.
16 fixed thresholds have at least one qualifying day at Alcove Dam.

Days at or above 30 C (86 F)

67 years with a qualifying day

Days per year at Alcove Dam with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 45 in 1959.

Days at or above 30 C (86 F) per year at Alcove Dam
Year	Days	Decade average
1943	27	25.4
1944	33	25.4
1945	17	25.4
1946	22	25.4
1947	28	25.4
1952	22	28.6
1953	29	28.6
1955	41	28.6
1956	18	28.6
1957	28	28.6
1958	17	28.6
1959	45	28.6
1960	9	21.4
1961	20	21.4
1963	21	21.4
1964	33	21.4
1965	26	21.4
1966	30	21.4
1967	14	21.4
1968	19	21.4
1969	21	21.4
1970	24	19.5
1971	25	19.5
1972	17	19.5
1973	27	19.5
1974	12	19.5
1975	18	19.5
1976	10	19.5
1977	19	19.5
1978	21	19.5
1979	22	19.5
1980	28	21.6
1981	17	21.6
1983	44	21.6
1984	30	21.6
1985	14	21.6
1987	13	21.6
1989	5	21.6
1991	23	15.3
1992	2	15.3
1993	16	15.3
1999	20	15.3
2000	4	14.3
2001	17	14.3
2002	31	14.3
2004	3	14.3
2005	25	14.3
2006	11	14.3
2007	12	14.3
2008	16	14.3
2009	10	14.3
2010	26	12.7
2011	10	12.7
2012	19	12.7
2013	13	12.7
2014	1	12.7
2015	12	12.7
2016	14	12.7
2017	10	12.7
2018	17	12.7
2019	5	12.7
2020	15	15.3
2021	12	15.3
2022	20	15.3
2023	6	15.3
2024	21	15.3
2026	18	15.3

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

First to last qualifying date each year at Alcove Dam
Year	First date	Last date
1943	1943-06-04	1943-09-08
1944	1944-05-05	1944-09-03
1945	1945-06-15	1945-09-09
1946	1946-05-25	1946-09-21
1947	1947-06-12	1947-10-17
1952	1952-06-26	1952-09-14
1953	1953-05-11	1953-09-06
1955	1955-06-18	1955-08-23
1956	1956-06-13	1956-09-06
1957	1957-06-15	1957-09-23
1958	1958-06-01	1958-09-16
1959	1959-05-08	1959-09-25
1960	1960-06-28	1960-09-02
1961	1961-06-06	1961-09-25
1963	1963-06-09	1963-10-08
1964	1964-05-10	1964-09-12
1965	1965-05-11	1965-09-23
1966	1966-06-05	1966-09-03
1967	1967-06-04	1967-09-05
1968	1968-06-07	1968-08-26
1969	1969-04-29	1969-09-02
1970	1970-05-11	1970-09-27
1971	1971-06-08	1971-09-09
1972	1972-07-03	1972-09-19
1973	1973-06-09	1973-09-06
1974	1974-04-30	1974-09-14
1975	1975-05-21	1975-08-04
1976	1976-04-19	1976-08-23
1977	1977-05-25	1977-09-02
1978	1978-05-27	1978-09-22
1979	1979-05-10	1979-09-04
1980	1980-05-24	1980-09-23
1981	1981-05-26	1981-08-12
1983	1983-06-12	1983-09-21
1984	1984-06-06	1984-09-24
1985	1985-05-12	1985-09-09
1987	1987-05-30	1987-08-18
1989	1989-07-26	1989-09-11
1991	1991-05-17	1991-09-17
1992	1992-05-24	1992-08-28
1993	1993-06-19	1993-09-01
1999	1999-06-08	1999-08-31
2000	2000-05-08	2000-06-11
2001	2001-05-02	2001-08-10
2002	2002-04-17	2002-09-11
2004	2004-04-20	2004-08-04
2005	2005-06-09	2005-09-15
2006	2006-05-31	2006-08-03
2007	2007-05-26	2007-09-27
2008	2008-06-08	2008-09-06
2009	2009-04-26	2009-08-22
2010	2010-04-08	2010-09-03
2011	2011-06-02	2011-07-24
2012	2012-04-17	2012-09-01
2013	2013-06-01	2013-09-12
2014	2014-07-24	2014-07-24
2015	2015-05-09	2015-09-10
2016	2016-05-29	2016-09-09
2017	2017-04-12	2017-09-28
2018	2018-05-03	2018-09-07
2019	2019-07-07	2019-09-24
2020	2020-05-29	2020-08-24
2021	2021-05-27	2021-08-27
2022	2022-06-01	2022-08-31
2023	2023-04-14	2023-09-08
2024	2024-05-22	2024-08-06
2026	2026-05-19	2026-08-09

Every Fixed Threshold

Fixed thresholds at Alcove Dam
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	67	45	1959	18
35 C (95 F): Days	18	7	1964	1
90 F (32.2 C): Days	60	26	1955	6
100 F (37.8 C): Days	1	1	1955	1
0 C (32 F): Ice days (max	67	68	1970	38
0 C (32 F): Frost days (min	60	201	1972	95
-10 C (14 F): Days with min	60	80	1978	37
-20 C (-4 F): Days with min	54	25	2015	12
-30 C (-22 F): Days with min	11	3	1970	2
20 C (68 F): Tropical nights (min	55	14	2005	3
10 mm (0.39 in): Days with 10 mm or more rain	73	50	1977	22
25 mm (0.98 in): Days with 25 mm or more rain	73	23	1983	6
50 mm (1.97 in): Days with 50 mm or more rain	58	4	1955	1
100 mm (3.94 in): Days with 100 mm or more rain	11	1	1952	1
10 cm (3.9 in): Days with 10 cm or more snowfall	15	6	2005	2
25 cm (9.8 in): Days with 25 cm or more snowfall	8	3	2019	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.

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Data for Alcove 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 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Alcove Dam Threshold Days by Year (USC00300063)

Key Facts for Alcove Dam Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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