Chugwater Threshold Days by Year (USC00481730)

19 fixed thresholds counted per year at Chugwater (USC00481730): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Chugwater Thresholds

Chugwater: days with a maximum temperature at or above 30 C (86 F) in 111 years, most in 1934 with 77.
Chugwater: days with a maximum temperature at or above 90 F (32.2 C) in 111 years, most in 2012 with 58.
Chugwater: days with a maximum temperature at or below 0 C (32 F) in 111 years, most in 1997 with 51.
Chugwater: nights with a minimum temperature at or below 0 C (32 F) in 111 years, most in 1903 with 211.
19 fixed thresholds have at least one qualifying day at Chugwater.

Days at or above 30 C (86 F)

111 years with a qualifying day

Days per year at Chugwater with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 77 in 1934.

Days at or above 30 C (86 F) per year at Chugwater
Year	Days	Decade average
1903	27	26.2
1905	16	26.2
1906	25	26.2
1907	24	26.2
1908	29	26.2
1909	36	26.2
1910	49	38.3
1911	38	38.3
1912	16	38.3
1914	43	38.3
1915	13	38.3
1917	42	38.3
1918	48	38.3
1919	57	38.3
1920	37	45.9
1921	54	45.9
1922	58	45.9
1923	29	45.9
1924	58	45.9
1925	54	45.9
1926	46	45.9
1928	29	45.9
1929	48	45.9
1930	34	60.2
1931	66	60.2
1932	73	60.2
1933	54	60.2
1934	77	60.2
1935	46	60.2
1936	75	60.2
1937	63	60.2
1938	42	60.2
1939	72	60.2
1940	69	53.3
1941	38	53.3
1942	47	53.3
1943	70	53.3
1944	55	53.3
1945	42	53.3
1946	54	53.3
1947	52	53.3
1948	58	53.3
1949	48	53.3
1950	34	54.4
1951	33	54.4
1952	69	54.4
1953	53	54.4
1954	60	54.4
1955	63	54.4
1956	65	54.4
1957	40	54.4
1958	54	54.4
1959	73	54.4
1960	68	52.9
1961	46	52.9
1962	40	52.9
1963	62	52.9
1964	58	52.9
1965	25	52.9
1966	65	52.9
1967	45	52.9
1968	49	52.9
1969	71	52.9
1970	56	55
1971	52	55
1972	42	55
1973	44	55
1974	60	55
1975	52	55
1976	65	55
1977	55	55
1978	67	55
1979	57	55
1980	64	52.5
1981	58	52.5
1982	45	52.5
1983	55	52.5
1984	53	52.5
1985	59	52.5
1986	47	52.5
1987	49	52.5
1988	60	52.5
1989	35	52.5
1990	30	31.3
1991	31	31.3
1992	14	31.3
1993	18	31.3
1994	37	31.3
1995	41	31.3
1996	40	31.3
1997	32	31.3
1998	46	31.3
1999	24	31.3
2000	67	56.1
2001	58	56.1
2002	69	56.1
2003	57	56.1
2004	39	56.1
2005	51	56.1
2006	60	56.1
2007	64	56.1
2008	40	56.1
2010	54	55
2011	61	55
2012	74	55
2013	62	55
2014	41	55
2015	53	55
2016	60	55
2017	55	55
2018	35	55

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

First to last qualifying date each year at Chugwater
Year	First date	Last date
1903	1903-06-28	1903-09-02
1905	1905-07-14	1905-09-23
1906	1906-06-16	1906-09-09
1907	1907-07-03	1907-09-17
1908	1908-06-21	1908-09-24
1909	1909-06-27	1909-09-10
1910	1910-06-14	1910-10-10
1911	1911-06-04	1911-09-13
1912	1912-06-23	1912-08-29
1914	1914-06-18	1914-09-27
1915	1915-04-29	1915-09-22
1917	1917-06-08	1917-09-30
1918	1918-06-09	1918-09-21
1919	1919-06-11	1919-09-12
1920	1920-06-07	1920-09-20
1921	1921-06-13	1921-09-25
1922	1922-06-09	1922-10-03
1923	1923-06-13	1923-09-10
1924	1924-06-11	1924-09-24
1925	1925-05-20	1925-09-04
1926	1926-05-23	1926-09-20
1928	1928-07-01	1928-09-07
1929	1929-06-25	1929-09-02
1930	1930-06-11	1930-08-25
1931	1931-05-25	1931-09-29
1932	1932-05-19	1932-09-14
1933	1933-06-10	1933-09-20
1934	1934-05-07	1934-10-07
1935	1935-06-14	1935-09-23
1936	1936-05-04	1936-09-22
1937	1937-05-28	1937-09-20
1938	1938-05-28	1938-09-29
1939	1939-05-22	1939-09-22
1940	1940-05-31	1940-09-09
1941	1941-05-12	1941-09-19
1942	1942-05-26	1942-09-29
1943	1943-05-28	1943-09-17
1944	1944-06-20	1944-09-17
1945	1945-06-22	1945-09-09
1946	1946-06-04	1946-09-14
1947	1947-06-16	1947-10-05
1948	1948-05-17	1948-09-22
1949	1949-06-22	1949-09-25
1950	1950-06-06	1950-09-07
1951	1951-07-04	1951-09-25
1952	1952-06-06	1952-09-28
1953	1953-06-10	1953-10-01
1954	1954-05-20	1954-09-22
1955	1955-06-20	1955-09-16
1956	1956-06-01	1956-09-26
1957	1957-06-04	1957-10-01
1958	1958-05-29	1958-10-18
1959	1959-05-01	1959-09-14
1960	1960-05-12	1960-09-10
1961	1961-06-09	1961-09-16
1962	1962-05-09	1962-09-15
1963	1963-06-13	1963-10-04
1964	1964-05-16	1964-09-25
1965	1965-07-04	1965-09-08
1966	1966-05-05	1966-09-23
1967	1967-05-23	1967-10-03
1968	1968-06-03	1968-09-14
1969	1969-05-25	1969-09-29
1970	1970-05-18	1970-09-05
1971	1971-06-16	1971-09-14
1972	1972-06-01	1972-09-18
1973	1973-06-07	1973-09-07
1974	1974-06-13	1974-09-11
1975	1975-05-16	1975-09-09
1976	1976-05-14	1976-09-11
1977	1977-06-01	1977-09-10
1978	1978-05-14	1978-09-10
1979	1979-06-05	1979-09-23
1980	1980-06-11	1980-08-30
1981	1981-06-06	1981-09-29
1982	1982-06-28	1982-09-09
1983	1983-06-18	1983-09-26
1984	1984-05-23	1984-09-20
1985	1985-06-07	1985-09-01
1986	1986-06-04	1986-08-29
1987	1987-05-10	1987-09-25
1988	1988-05-13	1988-09-17
1989	1989-05-23	1989-09-05
1990	1990-06-04	1990-09-13
1991	1991-06-25	1991-09-02
1992	1992-05-19	1992-09-24
1993	1993-06-16	1993-09-12
1994	1994-05-31	1994-09-29
1995	1995-06-14	1995-09-06
1996	1996-05-17	1996-09-06
1997	1997-06-20	1997-09-16
1998	1998-06-26	1998-09-26
1999	1999-06-09	1999-09-02
2000	2000-05-05	2000-09-18
2001	2001-05-14	2001-09-28
2002	2002-05-31	2002-09-08
2003	2003-05-30	2003-09-06
2004	2004-05-06	2004-09-18
2005	2005-05-21	2005-10-02
2006	2006-05-26	2006-09-14
2007	2007-06-12	2007-09-23
2008	2008-06-18	2008-09-26
2010	2010-05-29	2010-09-29
2011	2011-06-03	2011-10-02
2012	2012-04-25	2012-09-16
2013	2013-05-15	2013-09-09
2014	2014-05-29	2014-09-27
2015	2015-06-10	2015-09-28
2016	2016-06-08	2016-09-21
2017	2017-05-07	2017-09-22
2018	2018-05-27	2018-09-23

Every Fixed Threshold

Fixed thresholds at Chugwater
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	111	77	1934	35
35 C (95 F): Days	100	31	1936	6
40 C (104 F): Days	3	1	1934	1
90 F (32.2 C): Days	111	58	2012	16
100 F (37.8 C): Days	24	5	1939	2
110 F (43.3 C): Days	1	1	1937	1
0 C (32 F): Ice days (max	111	51	1997	29
0 C (32 F): Frost days (min	111	211	1903	172
-10 C (14 F): Days with min	111	83	1908	51
-20 C (-4 F): Days with min	110	27	1924	9
-30 C (-22 F): Days with min	57	5	1983	1
-40 C (-40 F): Days with min	1	1	1923	1
20 C (68 F): Tropical nights (min	9	5	1931	1
10 mm (0.39 in): Days with 10 mm or more rain	108	21	1947	16
25 mm (0.98 in): Days with 25 mm or more rain	94	9	1915	2
50 mm (1.97 in): Days with 50 mm or more rain	22	2	1941	1
10 cm (3.9 in): Days with 10 cm or more snowfall	100	9	1919	5
25 cm (9.8 in): Days with 25 cm or more snowfall	34	2	1919	1
50 cm (19.7 in): Days with 50 cm or more snowfall	7	1	1920	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1903.

Download the Data

Data for Chugwater 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).

Chugwater Threshold Days by Year (USC00481730)

Key Facts for Chugwater Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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