Stanley Wwtp Threshold Days by Year (USC00478110)

21 fixed thresholds counted per year at Stanley Wwtp (USC00478110): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Stanley Wwtp Thresholds

Stanley Wwtp: days with a maximum temperature at or above 30 C (86 F) in 98 years, most in 1937 with 55.
Stanley Wwtp: days with a maximum temperature at or below 0 C (32 F) in 98 years, most in 1978 with 101.
Stanley Wwtp: days with 10 mm (0.39 in) or more of precipitation in 97 years, most in 1938 with 46.
Stanley Wwtp: nights with a minimum temperature at or below 0 C (32 F) in 96 years, most in 1907 with 202.
21 fixed thresholds have at least one qualifying day at Stanley Wwtp.

Days at or above 30 C (86 F)

98 years with a qualifying day

Days per year at Stanley Wwtp with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 55 in 1937.

Days at or above 30 C (86 F) per year at Stanley Wwtp
Year	Days	Decade average
1904	3	10.8
1905	6	10.8
1906	14	10.8
1907	5	10.8
1908	22	10.8
1909	15	10.8
1910	33	17
1911	21	17
1912	14	17
1913	20	17
1914	18	17
1915	4	17
1916	25	17
1917	10	17
1918	10	17
1919	15	17
1920	14	13.4
1921	38	13.4
1922	14	13.4
1923	17	13.4
1924	2	13.4
1925	14	13.4
1926	8	13.4
1927	5	13.4
1928	8	13.4
1929	14	13.4
1930	25	33.9
1931	29	33.9
1934	44	33.9
1935	29	33.9
1936	54	33.9
1937	55	33.9
1938	8	33.9
1939	27	33.9
1940	17	15.6
1941	27	15.6
1942	8	15.6
1943	19	15.6
1944	16	15.6
1945	10	15.6
1946	12	15.6
1953	25	20.6
1954	17	20.6
1955	37	20.6
1956	9	20.6
1957	17	20.6
1958	13	20.6
1959	26	20.6
1960	20	18
1961	21	18
1962	7	18
1963	28	18
1964	33	18
1965	9	18
1966	28	18
1967	2	18
1968	16	18
1969	16	18
1970	25	20.6
1971	11	20.6
1972	15	20.6
1973	21	20.6
1975	25	20.6
1976	44	20.6
1977	21	20.6
1978	18	20.6
1979	5	20.6
1980	16	19.7
1981	7	19.7
1982	11	19.7
1983	36	19.7
1984	8	19.7
1985	12	19.7
1986	15	19.7
1987	26	19.7
1988	43	19.7
1989	23	19.7
1990	5	9.1
1991	14	9.1
1992	7	9.1
1993	3	9.1
1994	6	9.1
1995	18	9.1
1997	7	9.1
1998	5	9.1
1999	17	9.1
2000	2	11.9
2001	14	11.9
2002	18	11.9
2003	11	11.9
2004	2	11.9
2005	17	11.9
2006	19	11.9
2007	22	11.9
2008	6	11.9
2009	8	11.9
2010	12	13.5
2013	15	13.5

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

First to last qualifying date each year at Stanley Wwtp
Year	First date	Last date
1904	1904-07-16	1904-09-30
1905	1905-07-16	1905-08-11
1906	1906-06-28	1906-09-11
1907	1907-06-16	1907-08-31
1908	1908-06-06	1908-09-22
1909	1909-06-28	1909-08-27
1910	1910-06-13	1910-08-22
1911	1911-05-17	1911-08-15
1912	1912-06-25	1912-09-09
1913	1913-06-15	1913-09-07
1914	1914-05-26	1914-08-17
1915	1915-07-13	1915-09-08
1916	1916-07-06	1916-08-22
1917	1917-07-20	1917-08-19
1918	1918-05-03	1918-08-25
1919	1919-06-13	1919-09-08
1920	1920-06-10	1920-09-25
1921	1921-05-22	1921-09-09
1922	1922-06-23	1922-09-07
1923	1923-06-01	1923-08-10
1924	1924-08-26	1924-08-30
1925	1925-05-22	1925-09-04
1926	1926-05-01	1926-08-03
1927	1927-06-28	1927-09-14
1928	1928-07-01	1928-08-15
1929	1929-06-06	1929-09-03
1930	1930-07-07	1930-09-23
1931	1931-06-19	1931-09-16
1934	1934-05-06	1934-08-18
1935	1935-06-29	1935-08-19
1936	1936-06-16	1936-09-22
1937	1937-05-29	1937-09-23
1938	1938-06-22	1938-08-19
1939	1939-05-19	1939-09-15
1940	1940-06-02	1940-09-19
1941	1941-05-26	1941-09-21
1942	1942-07-12	1942-08-31
1943	1943-06-19	1943-08-23
1944	1944-05-30	1944-08-16
1945	1945-07-21	1945-09-08
1946	1946-05-27	1946-08-17
1953	1953-05-29	1953-10-02
1954	1954-06-11	1954-08-24
1955	1955-05-02	1955-09-18
1956	1956-06-09	1956-08-28
1957	1957-06-17	1957-09-01
1958	1958-06-30	1958-08-20
1959	1959-05-02	1959-09-09
1960	1960-07-11	1960-09-07
1961	1961-06-12	1961-09-09
1962	1962-05-16	1962-08-22
1963	1963-06-03	1963-08-08
1964	1964-05-22	1964-08-27
1965	1965-06-27	1965-08-14
1966	1966-06-04	1966-09-01
1967	1967-05-26	1967-07-21
1968	1968-06-04	1968-08-24
1969	1969-05-27	1969-08-31
1970	1970-04-29	1970-09-07
1971	1971-06-04	1971-09-03
1972	1972-05-17	1972-08-29
1973	1973-06-10	1973-09-01
1975	1975-05-20	1975-08-12
1976	1976-06-07	1976-10-01
1977	1977-05-13	1977-08-27
1978	1978-05-26	1978-09-11
1979	1979-07-10	1979-08-31
1980	1980-04-21	1980-09-08
1981	1981-07-05	1981-08-13
1982	1982-07-04	1982-08-19
1983	1983-06-14	1983-09-10
1984	1984-07-13	1984-08-29
1985	1985-06-09	1985-09-20
1986	1986-06-01	1986-08-17
1987	1987-05-11	1987-09-06
1988	1988-05-30	1988-08-18
1989	1989-06-19	1989-08-12
1990	1990-06-26	1990-09-05
1991	1991-05-15	1991-08-31
1992	1992-05-02	1992-08-25
1993	1993-08-12	1993-08-26
1994	1994-06-15	1994-08-26
1995	1995-06-18	1995-08-31
1997	1997-06-24	1997-08-03
1998	1998-05-15	1998-07-21
1999	1999-06-06	1999-09-04
2000	2000-06-09	2000-09-01
2001	2001-05-16	2001-08-09
2002	2002-04-16	2002-09-10
2003	2003-07-04	2003-09-09
2004	2004-06-08	2004-07-21
2005	2005-06-24	2005-09-12
2006	2006-05-29	2006-08-01
2007	2007-05-15	2007-10-08
2008	2008-06-26	2008-09-03
2009	2009-04-25	2009-08-15
2010	2010-06-23	2010-08-31
2013	2013-07-07	2013-09-10

Every Fixed Threshold

Fixed thresholds at Stanley Wwtp
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	98	55	1937	15
35 C (95 F): Days	23	21	1936	2
40 C (104 F): Days	3	4	1936	1
45 C (113 F): Days	1	2	1936	2
90 F (32.2 C): Days	82	40	1937	6
100 F (37.8 C): Days	5	9	1936	2
110 F (43.3 C): Days	1	3	1936	3
0 C (32 F): Ice days (max	98	101	1978	96
0 C (32 F): Frost days (min	96	202	1907	187
-10 C (14 F): Days with min	96	104	1955	96
-20 C (-4 F): Days with min	96	52	1917	40
-30 C (-22 F): Days with min	80	20	1936	2
-40 C (-40 F): Days with min	5	2	1935	1
20 C (68 F): Tropical nights (min	88	15	1937	8
25 C (77 F): Days with min	2	1	1925	1
10 mm (0.39 in): Days with 10 mm or more rain	97	46	1938	28
25 mm (0.98 in): Days with 25 mm or more rain	96	16	1938	4
50 mm (1.97 in): Days with 50 mm or more rain	59	5	1925	1
100 mm (3.94 in): Days with 100 mm or more rain	7	1	1911	1
10 cm (3.9 in): Days with 10 cm or more snowfall	62	9	1985	7
25 cm (9.8 in): Days with 25 cm or more snowfall	6	1	1918	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1904.

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Data for Stanley Wwtp 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).

Stanley Wwtp Threshold Days by Year (USC00478110)

Key Facts for Stanley Wwtp Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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