Sundance Threshold Days by Year

19 fixed thresholds counted per year at Sundance (USC00488705): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Sundance Thresholds

Sundance: days with 10 mm (0.39 in) or more of precipitation in 94 years, most in 1929 with 25.
Sundance: nights with a minimum temperature at or below 0 C (32 F) in 92 years, most in 1916 with 224.
Sundance: nights with a minimum temperature at or below -10 C (14 F) in 92 years, most in 1955 with 94.
Sundance: nights with a minimum temperature at or below -20 C (-4 F) in 92 years, most in 1937 with 39.
19 fixed thresholds have at least one qualifying day at Sundance.

Days at or above 30 C (86 F)

88 years with a qualifying day

Days per year at Sundance with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 67 in 1936.

Days at or above 30 C (86 F) per year at Sundance
Year	Days	Decade average
1893	33	23.5
1895	20	23.5
1896	19	23.5
1897	22	23.5
1916	35	34.7
1917	26	34.7
1919	43	34.7
1920	16	21.9
1921	32	21.9
1922	15	21.9
1923	8	21.9
1924	21	21.9
1925	23	21.9
1929	38	21.9
1930	27	46.8
1931	50	46.8
1932	48	46.8
1933	58	46.8
1934	49	46.8
1935	38	46.8
1936	67	46.8
1937	44	46.8
1938	40	46.8
1941	18	26.3
1942	15	26.3
1943	39	26.3
1944	19	26.3
1947	33	26.3
1948	34	26.3
1950	21	36.3
1951	19	36.3
1952	43	36.3
1953	34	36.3
1954	43	36.3
1955	39	36.3
1956	37	36.3
1957	35	36.3
1958	36	36.3
1959	56	36.3
1961	34	23.7
1962	15	23.7
1963	24	23.7
1964	28	23.7
1965	10	23.7
1966	31	23.7
1967	15	23.7
1968	20	23.7
1969	36	23.7
1970	35	22.7
1971	29	22.7
1972	11	22.7
1973	22	22.7
1974	25	22.7
1975	21	22.7
1976	23	22.7
1977	13	22.7
1978	26	22.7
1979	22	22.7
1980	28	32.8
1981	25	32.8
1982	23	32.8
1983	49	32.8
1984	30	32.8
1985	34	32.8
1986	19	32.8
1987	27	32.8
1988	54	32.8
1989	39	32.8
1990	37	29.9
1991	36	29.9
1992	12	29.9
1993	10	29.9
1994	35	29.9
1995	41	29.9
1996	37	29.9
1997	31	29.9
2007	63	43.5
2009	24	43.5
2010	33	31.3
2011	40	31.3
2012	65	31.3
2013	28	31.3
2014	21	31.3
2015	33	31.3
2016	37	31.3
2018	16	31.3
2019	9	31.3
2020	35	35

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

First to last qualifying date each year at Sundance
Year	First date	Last date
1893	1893-06-07	1893-09-11
1895	1895-07-04	1895-09-16
1896	1896-06-15	1896-08-29
1897	1897-06-13	1897-09-07
1916	1916-06-28	1916-09-04
1917	1917-06-17	1917-09-21
1919	1919-06-14	1919-09-26
1920	1920-06-08	1920-09-18
1921	1921-06-11	1921-09-02
1922	1922-06-21	1922-09-21
1923	1923-06-24	1923-07-30
1924	1924-06-14	1924-09-05
1925	1925-05-29	1925-09-02
1929	1929-06-15	1929-09-01
1930	1930-06-16	1930-08-25
1931	1931-05-25	1931-09-10
1932	1932-06-21	1932-10-01
1933	1933-05-31	1933-09-20
1934	1934-05-05	1934-09-12
1935	1935-06-29	1935-09-14
1936	1936-05-14	1936-09-22
1937	1937-05-28	1937-09-20
1938	1938-06-17	1938-09-29
1941	1941-06-24	1941-08-10
1942	1942-07-07	1942-09-09
1943	1943-06-22	1943-09-26
1944	1944-06-30	1944-09-08
1947	1947-07-02	1947-09-07
1948	1948-05-17	1948-09-04
1950	1950-06-06	1950-09-06
1951	1951-07-07	1951-08-23
1952	1952-06-06	1952-09-28
1953	1953-06-11	1953-09-22
1954	1954-05-21	1954-09-22
1955	1955-06-29	1955-09-15
1956	1956-06-09	1956-09-20
1957	1957-07-01	1957-10-01
1958	1958-05-29	1958-09-23
1959	1959-06-06	1959-09-14
1961	1961-06-08	1961-08-30
1962	1962-06-27	1962-08-26
1963	1963-06-24	1963-09-07
1964	1964-05-20	1964-08-19
1965	1965-07-15	1965-08-13
1966	1966-06-20	1966-09-08
1967	1967-07-20	1967-09-11
1968	1968-06-03	1968-08-20
1969	1969-05-26	1969-09-04
1970	1970-06-22	1970-08-31
1971	1971-06-23	1971-09-03
1972	1972-07-09	1972-08-16
1973	1973-06-09	1973-08-30
1974	1974-06-18	1974-08-24
1975	1975-06-25	1975-08-31
1976	1976-06-10	1976-09-06
1977	1977-06-02	1977-08-24
1978	1978-06-13	1978-09-27
1979	1979-06-12	1979-09-09
1980	1980-06-11	1980-09-07
1981	1981-06-26	1981-09-13
1982	1982-07-03	1982-09-09
1983	1983-06-21	1983-09-08
1984	1984-06-29	1984-09-19
1985	1985-06-20	1985-08-31
1986	1986-06-17	1986-08-29
1987	1987-05-15	1987-09-03
1988	1988-06-06	1988-08-30
1989	1989-06-16	1989-09-05
1990	1990-06-18	1990-09-13
1991	1991-06-29	1991-09-07
1992	1992-05-18	1992-10-04
1993	1993-07-29	1993-08-25
1994	1994-06-13	1994-09-09
1995	1995-06-14	1995-09-05
1996	1996-06-08	1996-09-08
1997	1997-06-16	1997-09-15
2007	2007-05-13	2007-09-22
2009	2009-05-18	2009-09-15
2010	2010-05-28	2010-08-29
2011	2011-06-05	2011-10-02
2012	2012-04-24	2012-10-02
2013	2013-05-13	2013-09-21
2014	2014-05-28	2014-09-26
2015	2015-06-09	2015-09-26
2016	2016-06-07	2016-08-28
2018	2018-05-26	2018-09-15
2019	2019-07-11	2019-09-16
2020	2020-05-19	2020-09-24

Every Fixed Threshold

Fixed thresholds at Sundance
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	88	67	1936	35
35 C (95 F): Days	64	26	1936	5
40 C (104 F): Days	3	1	1933	1
90 F (32.2 C): Days	87	45	2012	13
100 F (37.8 C): Days	15	6	1933	3
0 C (32 F): Ice days (max	88	88	1978	52
0 C (32 F): Frost days (min	92	224	1916	187
-10 C (14 F): Days with min	92	94	1955	51
-20 C (-4 F): Days with min	92	39	1937	2
-30 C (-22 F): Days with min	54	9	1936	1
-40 C (-40 F): Days with min	2	1	1936	1
20 C (68 F): Tropical nights (min	34	9	2012	2
25 C (77 F): Days with min	1	1	1931	1
10 mm (0.39 in): Days with 10 mm or more rain	94	25	1929	12
25 mm (0.98 in): Days with 25 mm or more rain	81	6	1922	1
50 mm (1.97 in): Days with 50 mm or more rain	17	2	1964	1
10 cm (3.9 in): Days with 10 cm or more snowfall	81	14	1922	11
25 cm (9.8 in): Days with 25 cm or more snowfall	30	4	1929	2
50 cm (19.7 in): Days with 50 cm or more snowfall	3	1	1929	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1893.

Download the Data

Data for Sundance 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 2026-10-15 (15 October 2026). Threshold counts are computed by this site.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Sundance Threshold Days by Year

Key Facts for Sundance Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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