Carson Threshold Days by Year (USC00321370)

20 fixed thresholds counted per year at Carson (USC00321370): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Carson Thresholds

Carson: nights with a minimum temperature at or below 0 C (32 F) in 86 years, most in 1925 with 213.
Carson: nights with a minimum temperature at or below -10 C (14 F) in 86 years, most in 1950 with 124.
Carson: nights with a minimum temperature at or below -20 C (-4 F) in 86 years, most in 1936 with 62.
Carson: days with a maximum temperature at or above 30 C (86 F) in 85 years, most in 1934 with 67.
20 fixed thresholds have at least one qualifying day at Carson.

Days at or above 30 C (86 F)

85 years with a qualifying day

Days per year at Carson with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 67 in 1934.

Days at or above 30 C (86 F) per year at Carson
Year	Days	Decade average
1912	32	38.8
1913	58	38.8
1914	24	38.8
1917	33	38.8
1918	34	38.8
1919	52	38.8
1920	21	32.3
1921	50	32.3
1922	39	32.3
1923	16	32.3
1924	13	32.3
1925	34	32.3
1926	44	32.3
1927	33	32.3
1928	22	32.3
1929	51	32.3
1930	45	55
1931	45	55
1932	38	55
1933	64	55
1934	67	55
1935	44	55
1936	65	55
1937	58	55
1938	61	55
1939	63	55
1940	59	44.8
1941	52	44.8
1942	29	44.8
1943	49	44.8
1944	31	44.8
1945	35	44.8
1946	42	44.8
1947	47	44.8
1948	48	44.8
1949	56	44.8
1950	31	37
1951	24	37
1952	37	37
1954	34	37
1957	31	37
1958	43	37
1959	59	37
1960	47	34.6
1961	59	34.6
1962	22	34.6
1963	32	34.6
1964	35	34.6
1965	20	34.6
1966	42	34.6
1967	38	34.6
1968	21	34.6
1969	30	34.6
1970	47	27.8
1971	25	27.8
1972	29	27.8
1973	30	27.8
1974	35	27.8
1975	18	27.8
1976	37	27.8
1977	19	27.8
1978	21	27.8
1979	17	27.8
1980	37	33.3
1981	21	33.3
1982	23	33.3
1983	42	33.3
1984	30	33.3
1985	23	33.3
1986	18	33.3
1987	34	33.3
1988	53	33.3
1989	52	33.3
1990	39	26.8
1991	27	26.8
1992	16	26.8
1993	9	26.8
1994	35	26.8
1995	32	26.8
1996	30	26.8
1997	26	26.8
2007	42	26.5
2009	11	26.5
2010	18	20
2011	22	20

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

First to last qualifying date each year at Carson
Year	First date	Last date
1912	1912-05-09	1912-09-07
1913	1913-04-14	1913-09-09
1914	1914-05-30	1914-10-02
1917	1917-05-15	1917-09-23
1918	1918-05-04	1918-09-12
1919	1919-05-22	1919-09-11
1920	1920-06-08	1920-10-07
1921	1921-06-11	1921-09-02
1922	1922-06-04	1922-10-04
1923	1923-06-11	1923-09-07
1924	1924-07-10	1924-09-30
1925	1925-05-19	1925-09-16
1926	1926-04-29	1926-09-28
1927	1927-06-18	1927-10-21
1928	1928-05-07	1928-09-06
1929	1929-05-24	1929-09-14
1930	1930-04-09	1930-09-22
1931	1931-05-15	1931-09-29
1932	1932-05-13	1932-09-16
1933	1933-05-31	1933-09-22
1934	1934-04-26	1934-10-11
1935	1935-06-14	1935-09-23
1936	1936-05-05	1936-10-08
1937	1937-05-26	1937-10-03
1938	1938-04-30	1938-10-03
1939	1939-04-30	1939-09-21
1940	1940-05-11	1940-09-20
1941	1941-05-13	1941-09-19
1942	1942-04-14	1942-10-10
1943	1943-05-28	1943-10-11
1944	1944-05-13	1944-09-08
1945	1945-06-21	1945-10-16
1946	1946-06-04	1946-09-16
1947	1947-07-02	1947-10-21
1948	1948-05-18	1948-09-29
1949	1949-04-29	1949-10-05
1950	1950-06-05	1950-09-06
1951	1951-05-23	1951-08-26
1952	1952-04-26	1952-09-17
1954	1954-05-20	1954-09-25
1957	1957-07-02	1957-10-03
1958	1958-05-12	1958-10-14
1959	1959-06-04	1959-09-14
1960	1960-05-23	1960-10-05
1961	1961-06-05	1961-09-01
1962	1962-04-24	1962-09-08
1963	1963-06-30	1963-10-05
1964	1964-05-21	1964-09-02
1965	1965-05-14	1965-08-17
1966	1966-05-05	1966-09-13
1967	1967-05-23	1967-09-23
1968	1968-05-01	1968-09-15
1969	1969-05-15	1969-09-14
1970	1970-05-18	1970-10-06
1971	1971-07-03	1971-09-03
1972	1972-05-16	1972-09-20
1973	1973-06-02	1973-09-01
1974	1974-06-04	1974-09-27
1975	1975-05-17	1975-08-08
1976	1976-06-03	1976-09-12
1977	1977-04-10	1977-08-10
1978	1978-07-05	1978-09-11
1979	1979-05-17	1979-09-17
1980	1980-04-21	1980-10-09
1981	1981-06-27	1981-09-13
1982	1982-07-04	1982-09-11
1983	1983-06-11	1983-09-28
1984	1984-05-17	1984-09-19
1985	1985-05-04	1985-08-09
1986	1986-05-05	1986-08-25
1987	1987-04-19	1987-10-04
1988	1988-05-27	1988-08-31
1989	1989-04-23	1989-10-01
1990	1990-04-23	1990-09-25
1991	1991-06-12	1991-10-17
1992	1992-05-01	1992-10-01
1993	1993-06-20	1993-09-11
1994	1994-04-17	1994-09-15
1995	1995-06-15	1995-09-04
1996	1996-06-09	1996-09-05
1997	1997-05-17	1997-10-02
2007	2007-05-19	2007-09-30
2009	2009-06-26	2009-09-18
2010	2010-05-29	2010-08-27
2011	2011-06-03	2011-10-03

Every Fixed Threshold

Fixed thresholds at Carson
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	85	67	1934	22
35 C (95 F): Days	81	35	1936	1
40 C (104 F): Days	28	15	1936	1
45 C (113 F): Days	1	1	1936	1
90 F (32.2 C): Days	85	50	1936	11
100 F (37.8 C): Days	58	25	1936	1
110 F (43.3 C): Days	3	2	1936	1
0 C (32 F): Ice days (max	85	108	1978	84
0 C (32 F): Frost days (min	86	213	1925	184
-10 C (14 F): Days with min	86	124	1950	76
-20 C (-4 F): Days with min	86	62	1936	33
-30 C (-22 F): Days with min	80	24	1936	7
-40 C (-40 F): Days with min	5	2	1936	1
20 C (68 F): Tropical nights (min	62	16	1936	3
25 C (77 F): Days with min	4	4	1936	1
10 mm (0.39 in): Days with 10 mm or more rain	71	24	1982	19
25 mm (0.98 in): Days with 25 mm or more rain	64	7	1914	7
50 mm (1.97 in): Days with 50 mm or more rain	19	2	1972	2
10 cm (3.9 in): Days with 10 cm or more snowfall	36	7	2009	4
25 cm (9.8 in): Days with 25 cm or more snowfall	4	3	2009	3

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 Carson 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 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Carson Threshold Days by Year (USC00321370)

Key Facts for Carson Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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