Mt Wx Threshold Days by Year (USC00445851)

17 fixed thresholds counted per year at Mt Wx (USC00445851): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Mt Wx Thresholds

Mt Wx: days with a maximum temperature at or below 0 C (32 F) in 96 years, most in 1978 with 59.
Mt Wx: days with a maximum temperature at or above 30 C (86 F) in 95 years, most in 2010 with 48.
Mt Wx: nights with a minimum temperature at or below 0 C (32 F) in 94 years, most in 1944 with 149.
Mt Wx: nights with a minimum temperature at or below -10 C (14 F) in 94 years, most in 1977 with 42.
17 fixed thresholds have at least one qualifying day at Mt Wx.

Days at or above 30 C (86 F)

95 years with a qualifying day

Days per year at Mt Wx with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 48 in 2010.

Days at or above 30 C (86 F) per year at Mt Wx
Year	Days	Decade average
1915	8	7.8
1916	7	7.8
1917	6	7.8
1918	11	7.8
1919	7	7.8
1920	2	10.2
1921	8	10.2
1922	3	10.2
1923	10	10.2
1924	7	10.2
1925	30	10.2
1926	12	10.2
1927	12	10.2
1928	5	10.2
1929	13	10.2
1930	41	27.8
1931	41	27.8
1932	21	27.8
1933	14	27.8
1934	28	27.8
1935	23	27.8
1936	32	27.8
1937	20	27.8
1939	30	27.8
1940	12	20.1
1941	20	20.1
1942	12	20.1
1943	30	20.1
1944	37	20.1
1945	15	20.1
1946	13	20.1
1947	14	20.1
1949	28	20.1
1951	32	31.4
1952	37	31.4
1953	47	31.4
1954	26	31.4
1955	28	31.4
1957	30	31.4
1958	20	31.4
1959	31	31.4
1960	15	17.4
1961	10	17.4
1962	10	17.4
1963	15	17.4
1964	25	17.4
1965	25	17.4
1966	40	17.4
1967	4	17.4
1968	21	17.4
1969	9	17.4
1970	13	8.9
1971	3	8.9
1972	6	8.9
1973	14	8.9
1974	8	8.9
1975	10	8.9
1976	4	8.9
1977	20	8.9
1978	7	8.9
1979	4	8.9
1980	23	19.7
1981	9	19.7
1982	5	19.7
1983	35	19.7
1984	10	19.7
1985	12	19.7
1986	23	19.7
1987	32	19.7
1988	36	19.7
1989	12	19.7
1990	10	17
1991	38	17
1992	5	17
1993	32	17
1994	11	17
1995	15	17
1996	4	17
1997	15	17
1998	16	17
1999	24	17
2000	4	18.4
2001	10	18.4
2002	20	18.4
2006	26	18.4
2007	36	18.4
2008	19	18.4
2009	14	18.4
2010	48	24.1
2011	33	24.1
2012	21	24.1
2013	14	24.1
2014	7	24.1
2015	11	24.1
2016	35	24.1

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

First to last qualifying date each year at Mt Wx
Year	First date	Last date
1915	1915-04-25	1915-10-22
1916	1916-07-30	1916-09-08
1917	1917-06-27	1917-08-20
1918	1918-05-26	1918-08-14
1919	1919-07-02	1919-09-07
1920	1920-07-23	1920-07-24
1921	1921-06-12	1921-09-04
1922	1922-07-01	1922-07-23
1923	1923-06-19	1923-07-21
1924	1924-06-20	1924-08-10
1925	1925-04-24	1925-09-20
1926	1926-06-14	1926-08-13
1927	1927-05-24	1927-10-01
1928	1928-05-05	1928-07-20
1929	1929-07-09	1929-09-04
1930	1930-06-04	1930-09-26
1931	1931-06-02	1931-09-23
1932	1932-06-05	1932-09-13
1933	1933-05-24	1933-09-27
1934	1934-05-10	1934-07-27
1935	1935-05-27	1935-08-18
1936	1936-05-08	1936-09-23
1937	1937-05-28	1937-09-04
1939	1939-05-29	1939-10-11
1940	1940-06-08	1940-08-07
1941	1941-05-22	1941-10-09
1942	1942-04-07	1942-09-16
1943	1943-05-06	1943-09-17
1944	1944-05-15	1944-09-06
1945	1945-06-15	1945-09-11
1946	1946-06-09	1946-09-10
1947	1947-06-12	1947-09-16
1949	1949-05-06	1949-08-28
1951	1951-06-04	1951-10-05
1952	1952-06-07	1952-09-13
1953	1953-06-06	1953-09-30
1954	1954-06-01	1954-10-13
1955	1955-06-19	1955-07-31
1957	1957-06-13	1957-09-13
1958	1958-06-10	1958-09-26
1959	1959-06-09	1959-10-05
1960	1960-04-23	1960-09-09
1961	1961-06-02	1961-09-22
1962	1962-05-15	1962-08-31
1963	1963-05-09	1963-08-21
1964	1964-05-18	1964-09-12
1965	1965-05-03	1965-09-11
1966	1966-06-22	1966-09-03
1967	1967-06-13	1967-06-21
1968	1968-06-24	1968-08-26
1969	1969-05-30	1969-07-19
1970	1970-06-12	1970-09-26
1971	1971-06-08	1971-07-09
1972	1972-07-20	1972-08-26
1973	1973-06-05	1973-09-03
1974	1974-04-30	1974-07-19
1975	1975-06-20	1975-08-27
1976	1976-04-19	1976-08-27
1977	1977-07-05	1977-09-03
1978	1978-06-19	1978-08-20
1979	1979-08-02	1979-08-11
1980	1980-06-04	1980-09-03
1981	1981-06-16	1981-07-22
1982	1982-07-09	1982-07-28
1983	1983-06-28	1983-09-13
1984	1984-06-07	1984-08-11
1985	1985-04-23	1985-09-10
1986	1986-06-13	1986-09-27
1987	1987-05-30	1987-08-28
1988	1988-06-14	1988-08-18
1989	1989-05-20	1989-09-11
1990	1990-04-27	1990-08-29
1991	1991-05-26	1991-09-18
1992	1992-07-11	1992-08-12
1993	1993-06-10	1993-09-16
1994	1994-06-08	1994-07-09
1995	1995-06-21	1995-08-22
1996	1996-05-20	1996-07-18
1997	1997-05-20	1997-08-18
1998	1998-06-26	1998-09-28
1999	1999-06-08	1999-08-19
2000	2000-06-03	2000-08-08
2001	2001-05-12	2001-08-10
2002	2002-04-18	2002-08-23
2006	2006-05-31	2006-08-30
2007	2007-06-09	2007-10-10
2008	2008-06-08	2008-09-15
2009	2009-04-26	2009-08-28
2010	2010-04-07	2010-09-26
2011	2011-05-27	2011-08-10
2012	2012-06-21	2012-09-01
2013	2013-04-11	2013-09-13
2014	2014-05-14	2014-09-07
2015	2015-06-12	2015-09-10
2016	2016-05-29	2016-09-15

Every Fixed Threshold

Fixed thresholds at Mt Wx
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	95	48	2010	35
35 C (95 F): Days	22	7	1953	1
90 F (32.2 C): Days	74	25	1953	10
100 F (37.8 C): Days	1	1	1936	1
0 C (32 F): Ice days (max	96	59	1978	15
0 C (32 F): Frost days (min	94	149	1944	96
-10 C (14 F): Days with min	94	42	1977	17
-20 C (-4 F): Days with min	19	5	1982	1
20 C (68 F): Tropical nights (min	93	45	2010	35
25 C (77 F): Days with min	13	2	2010	1
10 mm (0.39 in): Days with 10 mm or more rain	82	53	1996	38
25 mm (0.98 in): Days with 25 mm or more rain	82	19	1979	10
50 mm (1.97 in): Days with 50 mm or more rain	64	5	1945	4
100 mm (3.94 in): Days with 100 mm or more rain	16	1	1926	1
10 cm (3.9 in): Days with 10 cm or more snowfall	62	8	1917	6
25 cm (9.8 in): Days with 25 cm or more snowfall	19	2	1967	1
50 cm (19.7 in): Days with 50 cm or more snowfall	3	1	1924	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1915.

Download the Data

Data for Mt Wx 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).

Mt Wx Threshold Days by Year (USC00445851)

Key Facts for Mt Wx Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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