Genoa Dam 8 Threshold Days by Year (USC00473038)

19 fixed thresholds counted per year at Genoa Dam 8 (USC00473038): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Genoa Dam 8 Thresholds

Genoa Dam 8: days with a maximum temperature at or above 30 C (86 F) in 85 years, most in 1955 with 60.
Genoa Dam 8: days with a maximum temperature at or below 0 C (32 F) in 85 years, most in 1978 with 87.
Genoa Dam 8: nights with a minimum temperature at or below 0 C (32 F) in 85 years, most in 1952 with 167.
Genoa Dam 8: nights with a minimum temperature at or below -10 C (14 F) in 85 years, most in 1978 with 82.
19 fixed thresholds have at least one qualifying day at Genoa Dam 8.

Days at or above 30 C (86 F)

85 years with a qualifying day

Days per year at Genoa Dam 8 with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 60 in 1955.

Days at or above 30 C (86 F) per year at Genoa Dam 8
Year	Days	Decade average
1940	42	41.1
1941	48	41.1
1942	23	41.1
1943	54	41.1
1945	28	41.1
1946	26	41.1
1947	49	41.1
1948	51	41.1
1949	49	41.1
1950	15	31.7
1951	12	31.7
1952	37	31.7
1953	32	31.7
1954	36	31.7
1955	60	31.7
1956	33	31.7
1957	31	31.7
1958	25	31.7
1959	36	31.7
1960	26	26.8
1961	33	26.8
1962	25	26.8
1963	38	26.8
1964	42	26.8
1965	19	26.8
1966	32	26.8
1967	12	26.8
1968	24	26.8
1969	17	26.8
1970	27	26.8
1971	23	26.8
1972	23	26.8
1973	21	26.8
1974	21	26.8
1975	36	26.8
1976	39	26.8
1977	30	26.8
1978	30	26.8
1979	18	26.8
1980	33	29.6
1981	17	29.6
1982	16	29.6
1983	43	29.6
1984	24	29.6
1985	23	29.6
1986	18	29.6
1987	41	29.6
1988	60	29.6
1989	21	29.6
1990	14	20.7
1991	32	20.7
1992	9	20.7
1993	11	20.7
1994	14	20.7
1995	39	20.7
1996	18	20.7
1997	16	20.7
1998	27	20.7
1999	27	20.7
2001	33	25.8
2002	32	25.8
2003	18	25.8
2004	6	25.8
2005	46	25.8
2006	31	25.8
2007	43	25.8
2008	13	25.8
2009	10	25.8
2010	40	32.2
2011	46	32.2
2012	54	32.2
2013	31	32.2
2014	7	32.2
2015	22	32.2
2016	28	32.2
2017	36	32.2
2018	41	32.2
2019	17	32.2
2020	28	26.3
2021	29	26.3
2022	23	26.3
2023	37	26.3
2024	17	26.3
2025	28	26.3
2026	22	26.3

For each year, a bar from the first to the last day at Genoa Dam 8 meeting 30 C (86 F).

First to last qualifying date each year at Genoa Dam 8
Year	First date	Last date
1940	1940-05-12	1940-09-20
1941	1941-04-30	1941-09-21
1942	1942-04-30	1942-09-11
1943	1943-05-29	1943-09-03
1945	1945-06-23	1945-09-07
1946	1946-05-27	1946-08-16
1947	1947-06-09	1947-09-19
1948	1948-05-20	1948-09-19
1949	1949-05-03	1949-08-26
1950	1950-06-06	1950-09-01
1951	1951-07-07	1951-08-28
1952	1952-04-29	1952-09-28
1953	1953-05-08	1953-10-02
1954	1954-06-11	1954-09-06
1955	1955-05-19	1955-09-18
1956	1956-05-21	1956-08-28
1957	1957-06-16	1957-09-01
1958	1958-06-28	1958-09-03
1959	1959-05-02	1959-09-09
1960	1960-07-18	1960-09-07
1961	1961-05-31	1961-09-10
1962	1962-05-16	1962-08-29
1963	1963-06-04	1963-10-06
1964	1964-05-18	1964-09-09
1965	1965-06-27	1965-08-17
1966	1966-05-26	1966-09-03
1967	1967-05-18	1967-07-31
1968	1968-06-04	1968-08-24
1969	1969-05-27	1969-08-30
1970	1970-05-21	1970-09-07
1971	1971-06-04	1971-09-07
1972	1972-05-18	1972-08-29
1973	1973-06-08	1973-09-01
1974	1974-06-20	1974-08-26
1975	1975-05-19	1975-08-24
1976	1976-06-07	1976-10-01
1977	1977-05-13	1977-08-27
1978	1978-05-25	1978-09-11
1979	1979-06-15	1979-09-11
1980	1980-04-21	1980-09-08
1981	1981-06-05	1981-09-11
1982	1982-07-03	1982-08-19
1983	1983-06-21	1983-09-09
1984	1984-06-26	1984-09-24
1985	1985-06-08	1985-09-19
1986	1986-05-31	1986-09-26
1987	1987-05-09	1987-08-16
1988	1988-05-28	1988-09-17
1989	1989-06-19	1989-08-22
1990	1990-06-26	1990-09-06
1991	1991-05-13	1991-08-30
1992	1992-05-01	1992-08-25
1993	1993-06-22	1993-09-12
1994	1994-04-18	1994-09-15
1995	1995-06-03	1995-08-31
1996	1996-05-18	1996-08-22
1997	1997-06-22	1997-10-04
1998	1998-05-14	1998-09-13
1999	1999-05-30	1999-09-03
2001	2001-05-15	2001-08-09
2002	2002-04-15	2002-09-09
2003	2003-04-14	2003-09-06
2004	2004-06-07	2004-08-06
2005	2005-06-06	2005-10-04
2006	2006-05-28	2006-08-04
2007	2007-04-29	2007-10-06
2008	2008-06-25	2008-09-02
2009	2009-04-24	2009-08-14
2010	2010-05-23	2010-08-31
2011	2011-05-10	2011-09-12
2012	2012-05-19	2012-09-11
2013	2013-05-14	2013-09-10
2014	2014-05-30	2014-09-05
2015	2015-06-09	2015-09-07
2016	2016-05-06	2016-09-06
2017	2017-05-16	2017-09-24
2018	2018-05-23	2018-09-17
2019	2019-06-30	2019-10-01
2020	2020-06-03	2020-08-29
2021	2021-05-02	2021-09-20
2022	2022-05-12	2022-09-21
2023	2023-05-31	2023-10-02
2024	2024-05-19	2024-09-21
2025	2025-06-03	2025-10-05
2026	2026-05-27	2026-10-13

Every Fixed Threshold

Fixed thresholds at Genoa Dam 8
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	85	60	1955	22
35 C (95 F): Days	44	12	1955	1
40 C (104 F): Days	1	1	1995	1
90 F (32.2 C): Days	84	41	1955	8
100 F (37.8 C): Days	7	2	1988	1
0 C (32 F): Ice days (max	85	87	1978	36
0 C (32 F): Frost days (min	85	167	1952	85
-10 C (14 F): Days with min	85	82	1978	35
-20 C (-4 F): Days with min	85	38	1978	10
-30 C (-22 F): Days with min	30	7	1951	2
-40 C (-40 F): Days with min	1	1	1951	1
20 C (68 F): Tropical nights (min	85	40	1983	20
25 C (77 F): Days with min	40	6	1988	2
10 mm (0.39 in): Days with 10 mm or more rain	85	47	2018	23
25 mm (0.98 in): Days with 25 mm or more rain	85	18	1959	9
50 mm (1.97 in): Days with 50 mm or more rain	67	6	2016	4
100 mm (3.94 in): Days with 100 mm or more rain	10	2	1959	1
10 cm (3.9 in): Days with 10 cm or more snowfall	62	7	1985	3
25 cm (9.8 in): Days with 25 cm or more snowfall	6	2	1971	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1940.

Download the Data

Data for Genoa Dam 8 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).

Genoa Dam 8 Threshold Days by Year (USC00473038)

Key Facts for Genoa Dam 8 Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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