Cottage Grove Dam Threshold Days by Year (USC00351902)

15 fixed thresholds counted per year at Cottage Grove Dam (USC00351902): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Cottage Grove Dam Thresholds

Cottage Grove Dam: days with a maximum temperature at or above 30 C (86 F) in 75 years, most in 2025 with 53.
Cottage Grove Dam: days with a maximum temperature at or above 90 F (32.2 C) in 75 years, most in 2025 with 30.
Cottage Grove Dam: nights with a minimum temperature at or below 0 C (32 F) in 73 years, most in 1985 with 109.
Cottage Grove Dam: days with 10 mm (0.39 in) or more of precipitation in 66 years, most in 1996 with 69.
15 fixed thresholds have at least one qualifying day at Cottage Grove Dam.

Days at or above 30 C (86 F)

75 years with a qualifying day

Days per year at Cottage Grove Dam with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 53 in 2025.

Days at or above 30 C (86 F) per year at Cottage Grove Dam
Year	Days	Decade average
1944	28	20.7
1945	34	20.7
1946	22	20.7
1947	9	20.7
1948	13	20.7
1949	18	20.7
1950	25	24.1
1951	30	24.1
1952	34	24.1
1953	20	24.1
1955	13	24.1
1956	23	24.1
1957	13	24.1
1958	38	24.1
1959	21	24.1
1960	24	20.9
1961	30	20.9
1962	22	20.9
1963	13	20.9
1964	12	20.9
1965	24	20.9
1966	16	20.9
1967	39	20.9
1968	17	20.9
1969	12	20.9
1970	28	23.2
1971	19	23.2
1972	34	23.2
1973	26	23.2
1974	32	23.2
1975	19	23.2
1976	12	23.2
1977	21	23.2
1978	21	23.2
1979	20	23.2
1980	14	19.2
1981	23	19.2
1982	16	19.2
1983	10	19.2
1984	15	19.2
1985	26	19.2
1986	27	19.2
1987	34	19.2
1988	21	19.2
1989	6	19.2
1990	28	24.5
1991	32	24.5
1992	33	24.5
1993	17	24.5
1994	21	24.5
1995	21	24.5
1996	27	24.5
1997	14	24.5
1998	32	24.5
1999	20	24.5
2000	16	18
2001	12	18
2007	13	18
2009	31	18
2010	21	29.1
2011	19	29.1
2012	15	29.1
2013	29	29.1
2014	41	29.1
2015	32	29.1
2017	42	29.1
2018	40	29.1
2019	23	29.1
2020	32	43.9
2021	48	43.9
2022	41	43.9
2023	51	43.9
2024	47	43.9
2025	53	43.9
2026	35	43.9

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

First to last qualifying date each year at Cottage Grove Dam
Year	First date	Last date
1944	1944-05-04	1944-09-11
1945	1945-06-17	1945-10-01
1946	1946-06-19	1946-09-24
1947	1947-05-01	1947-09-23
1948	1948-06-06	1948-09-13
1949	1949-05-12	1949-09-05
1950	1950-05-27	1950-09-23
1951	1951-06-24	1951-09-21
1952	1952-06-05	1952-10-07
1953	1953-07-07	1953-09-15
1955	1955-06-09	1955-09-07
1956	1956-04-21	1956-09-07
1957	1957-04-30	1957-09-24
1958	1958-06-17	1958-09-08
1959	1959-07-10	1959-09-03
1960	1960-06-24	1960-09-11
1961	1961-06-15	1961-09-13
1962	1962-07-21	1962-09-18
1963	1963-05-21	1963-09-28
1964	1964-07-08	1964-08-25
1965	1965-07-01	1965-09-26
1966	1966-06-14	1966-10-05
1967	1967-06-17	1967-09-29
1968	1968-06-26	1968-09-06
1969	1969-06-04	1969-09-12
1970	1970-06-02	1970-09-29
1971	1971-05-12	1971-09-23
1972	1972-05-29	1972-09-04
1973	1973-05-14	1973-09-11
1974	1974-06-13	1974-09-26
1975	1975-05-14	1975-10-01
1976	1976-06-19	1976-09-11
1977	1977-07-24	1977-08-18
1978	1978-06-03	1978-08-11
1979	1979-06-02	1979-10-04
1980	1980-07-22	1980-10-06
1981	1981-07-03	1981-09-17
1982	1982-06-19	1982-09-03
1983	1983-05-24	1983-08-15
1984	1984-05-30	1984-09-18
1985	1985-05-23	1985-09-26
1986	1986-05-26	1986-09-07
1987	1987-04-27	1987-10-07
1988	1988-05-12	1988-10-02
1989	1989-06-25	1989-09-24
1990	1990-06-22	1990-09-24
1991	1991-07-03	1991-10-16
1992	1992-05-04	1992-09-30
1993	1993-08-02	1993-10-02
1994	1994-07-08	1994-09-23
1995	1995-06-28	1995-09-23
1996	1996-06-03	1996-10-10
1997	1997-05-12	1997-09-25
1998	1998-04-30	1998-09-16
1999	1999-05-24	1999-09-24
2000	2000-06-27	2000-09-14
2001	2001-05-23	2001-10-01
2007	2007-06-20	2007-09-10
2009	2009-05-29	2009-09-23
2010	2010-07-07	2010-09-03
2011	2011-07-25	2011-09-25
2012	2012-07-09	2012-09-16
2013	2013-05-06	2013-09-12
2014	2014-05-02	2014-10-07
2015	2015-06-08	2015-10-06
2017	2017-05-07	2017-09-30
2018	2018-06-20	2018-09-29
2019	2019-05-11	2019-09-01
2020	2020-05-10	2020-10-03
2021	2021-06-02	2021-09-25
2022	2022-06-26	2022-10-10
2023	2023-05-14	2023-10-09
2024	2024-05-11	2024-09-25
2025	2025-06-07	2025-09-24
2026	2026-05-04	2026-08-27

Every Fixed Threshold

Fixed thresholds at Cottage Grove Dam
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	75	53	2025	35
35 C (95 F): Days	55	11	2024	8
40 C (104 F): Days	5	2	1981	1
90 F (32.2 C): Days	75	30	2025	15
100 F (37.8 C): Days	24	5	2024	1
0 C (32 F): Ice days (max	38	10	1993	1
0 C (32 F): Frost days (min	73	109	1985	34
-10 C (14 F): Days with min	21	11	1990	1
20 C (68 F): Tropical nights (min	1	0	n/a	1
10 mm (0.39 in): Days with 10 mm or more rain	66	69	1996	16
25 mm (0.98 in): Days with 25 mm or more rain	66	19	1996	7
50 mm (1.97 in): Days with 50 mm or more rain	51	5	1961	1
100 mm (3.94 in): Days with 100 mm or more rain	6	2	1961	1
10 cm (3.9 in): Days with 10 cm or more snowfall	9	13	1950	1
25 cm (9.8 in): Days with 25 cm or more snowfall	2	3	1950	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.

Download the Data

Data for Cottage Grove 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).

Cottage Grove Dam Threshold Days by Year (USC00351902)

Key Facts for Cottage Grove Dam Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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