Downieville Threshold Days by Year (USC00042500)

17 fixed thresholds counted per year at Downieville (USC00042500): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Downieville Thresholds

Downieville: days with 10 mm (0.39 in) or more of precipitation in 96 years, most in 1909 with 65.
Downieville: days with 25 mm (0.98 in) or more of precipitation in 96 years, most in 1996 with 40.
Downieville: days with 50 mm (1.97 in) or more of precipitation in 95 years, most in 1950 with 21.
Downieville: days with a maximum temperature at or above 30 C (86 F) in 78 years, most in 2001 with 110.
17 fixed thresholds have at least one qualifying day at Downieville.

Days at or above 30 C (86 F)

78 years with a qualifying day

Days per year at Downieville with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 110 in 2001.

Days at or above 30 C (86 F) per year at Downieville
Year	Days	Decade average
1912	56	79.5
1913	67	79.5
1914	83	79.5
1915	87	79.5
1916	66	79.5
1917	100	79.5
1918	88	79.5
1919	89	79.5
1920	69	78.5
1921	85	78.5
1922	89	78.5
1923	68	78.5
1924	103	78.5
1925	56	78.5
1926	78	78.5
1927	56	78.5
1928	87	78.5
1929	94	78.5
1947	64	59.3
1948	56	59.3
1949	58	59.3
1950	80	64
1953	65	64
1954	54	64
1955	63	64
1956	44	64
1957	63	64
1958	77	64
1959	66	64
1960	79	64.4
1961	73	64.4
1962	57	64.4
1963	53	64.4
1964	60	64.4
1972	57	69.7
1973	77	69.7
1974	75	69.7
1984	88	82
1985	80	82
1986	74	82
1987	90	82
1988	92	82
1989	68	82
1990	69	76.1
1991	88	76.1
1992	77	76.1
1993	61	76.1
1994	92	76.1
1995	70	76.1
1996	85	76.1
1997	74	76.1
1998	59	76.1
1999	86	76.1
2000	89	90.4
2001	110	90.4
2002	99	90.4
2003	103	90.4
2004	93	90.4
2005	68	90.4
2006	90	90.4
2007	73	90.4
2008	99	90.4
2009	80	90.4
2010	68	81
2011	70	81
2014	84	81
2015	91	81
2016	84	81
2017	91	81
2018	84	81
2019	76	81
2020	104	85.9
2021	89	85.9
2022	88	85.9
2023	67	85.9
2024	96	85.9
2025	79	85.9
2026	78	85.9

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

First to last qualifying date each year at Downieville
Year	First date	Last date
1912	1912-05-13	1912-09-21
1913	1913-05-06	1913-10-22
1914	1914-05-20	1914-09-24
1915	1915-05-27	1915-10-08
1916	1916-06-05	1916-09-29
1917	1917-06-07	1917-10-13
1918	1918-04-30	1918-09-18
1919	1919-04-29	1919-09-26
1920	1920-05-16	1920-09-29
1921	1921-04-28	1921-10-07
1922	1922-05-13	1922-09-24
1923	1923-05-06	1923-09-30
1924	1924-05-06	1924-09-29
1925	1925-04-15	1925-08-30
1926	1926-04-25	1926-09-26
1927	1927-04-25	1927-10-19
1928	1928-05-12	1928-10-19
1929	1929-05-15	1929-10-23
1947	1947-04-14	1947-10-04
1948	1948-06-24	1948-09-15
1949	1949-05-25	1949-10-31
1950	1950-05-21	1950-10-20
1953	1953-06-18	1953-10-08
1954	1954-04-18	1954-10-16
1955	1955-05-20	1955-09-13
1956	1956-06-23	1956-10-07
1957	1957-05-29	1957-09-24
1958	1958-05-10	1958-10-05
1959	1959-05-13	1959-10-24
1960	1960-05-31	1960-09-30
1961	1961-06-14	1961-10-16
1962	1962-06-10	1962-09-25
1963	1963-05-20	1963-10-03
1964	1964-06-22	1964-10-07
1972	1972-05-13	1972-09-16
1973	1973-05-12	1973-09-29
1974	1974-05-05	1974-10-19
1984	1984-05-22	1984-09-28
1985	1985-04-13	1985-10-05
1986	1986-05-25	1986-09-07
1987	1987-04-26	1987-10-06
1988	1988-05-11	1988-10-26
1989	1989-04-06	1989-09-23
1990	1990-05-04	1990-10-03
1991	1991-06-01	1991-10-19
1992	1992-05-03	1992-10-12
1993	1993-06-17	1993-10-03
1994	1994-05-10	1994-09-27
1995	1995-06-23	1995-10-27
1996	1996-04-30	1996-10-09
1997	1997-05-10	1997-09-30
1998	1998-07-06	1998-09-17
1999	1999-05-22	1999-10-21
2000	2000-05-19	2000-10-07
2001	2001-05-07	2001-10-15
2002	2002-05-29	2002-10-16
2003	2003-05-21	2003-10-28
2004	2004-04-26	2004-10-14
2005	2005-05-25	2005-09-30
2006	2006-04-28	2006-09-28
2007	2007-05-14	2007-09-12
2008	2008-05-15	2008-09-30
2009	2009-04-20	2009-09-27
2010	2010-06-13	2010-10-03
2011	2011-06-14	2011-09-29
2014	2014-04-30	2014-10-07
2015	2015-05-30	2015-10-14
2016	2016-05-30	2016-09-28
2017	2017-05-03	2017-10-24
2018	2018-05-28	2018-09-28
2019	2019-06-03	2019-09-26
2020	2020-04-28	2020-10-16
2021	2021-05-29	2021-09-24
2022	2022-05-18	2022-10-19
2023	2023-04-27	2023-10-18
2024	2024-05-14	2024-10-08
2025	2025-05-29	2025-09-26
2026	2026-03-19	2026-09-29

Every Fixed Threshold

Fixed thresholds at Downieville
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	78	110	2001	78
35 C (95 F): Days	78	36	2001	14
40 C (104 F): Days	17	4	1988	4
90 F (32.2 C): Days	78	76	2001	50
100 F (37.8 C): Days	59	11	2006	2
0 C (32 F): Ice days (max	32	7	1972	3
0 C (32 F): Frost days (min	78	180	1929	54
-10 C (14 F): Days with min	34	23	1949	2
20 C (68 F): Tropical nights (min	2	1	1992	1
10 mm (0.39 in): Days with 10 mm or more rain	96	65	1909	21
25 mm (0.98 in): Days with 25 mm or more rain	96	40	1996	11
50 mm (1.97 in): Days with 50 mm or more rain	95	21	1950	3
100 mm (3.94 in): Days with 100 mm or more rain	56	6	2017	1
200 mm (7.87 in): Days with 200 mm or more rain	2	1	1962	1
10 cm (3.9 in): Days with 10 cm or more snowfall	57	12	1955	2
25 cm (9.8 in): Days with 25 cm or more snowfall	23	6	1955	1
50 cm (19.7 in): Days with 50 cm or more snowfall	5	1	1989	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1912.

Download the Data

Data for Downieville 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).

Downieville Threshold Days by Year (USC00042500)

Key Facts for Downieville Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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