W Chester 2 NW Threshold Days by Year (USC00369464)

19 fixed thresholds counted per year at W Chester 2 NW (USC00369464): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for W Chester 2 NW Thresholds

W Chester 2 NW: days with a maximum temperature at or above 30 C (86 F) in 104 years, most in 2005 with 80.
W Chester 2 NW: days with a maximum temperature at or above 90 F (32.2 C) in 104 years, most in 2002 with 53.
W Chester 2 NW: days with a maximum temperature at or below 0 C (32 F) in 104 years, most in 1904 with 49.
W Chester 2 NW: nights with a minimum temperature at or below 0 C (32 F) in 103 years, most in 2002 with 145.
19 fixed thresholds have at least one qualifying day at W Chester 2 NW.

Days at or above 30 C (86 F)

104 years with a qualifying day

Days per year at W Chester 2 NW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 80 in 2005.

Days at or above 30 C (86 F) per year at W Chester 2 NW
Year	Days	Decade average
1893	35	37
1894	37	37
1895	47	37
1896	41	37
1897	26	37
1898	43	37
1899	30	37
1900	48	36.2
1901	40	36.2
1902	27	36.2
1903	23	36.2
1904	21	36.2
1905	36	36.2
1906	50	36.2
1907	33	36.2
1908	44	36.2
1909	40	36.2
1910	27	38.1
1911	46	38.1
1912	34	38.1
1913	43	38.1
1915	42	38.1
1916	41	38.1
1917	39	38.1
1918	39	38.1
1919	32	38.1
1921	47	31.8
1922	25	31.8
1923	34	31.8
1924	16	31.8
1925	30	31.8
1926	35	31.8
1928	32	31.8
1929	35	31.8
1930	55	44.6
1931	38	44.6
1932	30	44.6
1933	31	44.6
1935	27	44.6
1936	54	44.6
1937	52	44.6
1938	50	44.6
1939	64	44.6
1940	40	48.8
1941	65	48.8
1942	39	48.8
1943	62	48.8
1944	57	48.8
1945	44	48.8
1946	28	48.8
1947	53	48.8
1948	38	48.8
1949	62	48.8
1950	32	53.1
1951	50	53.1
1952	51	53.1
1953	57	53.1
1954	49	53.1
1955	63	53.1
1956	57	53.1
1958	42	53.1
1959	77	53.1
1960	44	59.4
1961	56	59.4
1963	61	59.4
1964	64	59.4
1965	62	59.4
1966	66	59.4
1969	63	59.4
1972	24	28.4
1973	43	28.4
1974	23	28.4
1975	26	28.4
1976	27	28.4
1977	37	28.4
1978	26	28.4
1979	21	28.4
1980	61	49.3
1981	28	49.3
1982	35	49.3
1983	63	49.3
1984	29	49.3
1985	38	49.3
1986	57	49.3
1987	69	49.3
1988	67	49.3
1989	46	49.3
2000	46	57.9
2001	69	57.9
2002	79	57.9
2003	52	57.9
2004	53	57.9
2005	80	57.9
2006	57	57.9
2007	63	57.9
2008	49	57.9
2009	31	57.9
2010	72	59.9
2011	62	59.9
2012	61	59.9
2013	49	59.9
2014	41	59.9
2015	65	59.9
2016	69	59.9

For each year, a bar from the first to the last day at W Chester 2 NW meeting 30 C (86 F).

First to last qualifying date each year at W Chester 2 NW
Year	First date	Last date
1893	1893-05-21	1893-09-19
1894	1894-05-02	1894-09-10
1895	1895-05-10	1895-09-26
1896	1896-04-16	1896-09-19
1897	1897-06-15	1897-10-16
1898	1898-05-20	1898-09-18
1899	1899-05-28	1899-09-06
1900	1900-05-13	1900-10-06
1901	1901-06-06	1901-09-15
1902	1902-04-22	1902-09-08
1903	1903-04-30	1903-09-14
1904	1904-05-25	1904-09-12
1905	1905-06-06	1905-10-01
1906	1906-05-17	1906-09-21
1907	1907-06-17	1907-09-24
1908	1908-05-13	1908-09-11
1909	1909-05-06	1909-08-29
1910	1910-05-24	1910-09-06
1911	1911-05-11	1911-09-25
1912	1912-05-21	1912-09-11
1913	1913-05-02	1913-09-07
1915	1915-04-25	1915-09-17
1916	1916-05-28	1916-09-27
1917	1917-06-14	1917-08-29
1918	1918-05-06	1918-08-31
1919	1919-05-05	1919-10-03
1921	1921-05-22	1921-09-29
1922	1922-06-09	1922-10-05
1923	1923-06-02	1923-08-15
1924	1924-06-21	1924-09-02
1925	1925-05-23	1925-09-13
1926	1926-05-02	1926-09-25
1928	1928-05-04	1928-09-13
1929	1929-04-07	1929-09-10
1930	1930-05-04	1930-09-16
1931	1931-05-29	1931-09-22
1932	1932-06-04	1932-09-05
1933	1933-05-20	1933-09-25
1935	1935-06-14	1935-08-15
1936	1936-05-08	1936-09-22
1937	1937-05-22	1937-09-04
1938	1938-04-28	1938-10-17
1939	1939-04-25	1939-10-10
1940	1940-05-14	1940-09-21
1941	1941-04-14	1941-10-07
1942	1942-04-30	1942-09-17
1943	1943-05-07	1943-09-16
1944	1944-05-13	1944-10-07
1945	1945-03-29	1945-09-29
1946	1946-06-01	1946-09-19
1947	1947-05-13	1947-10-21
1948	1948-05-11	1948-09-18
1949	1949-05-04	1949-10-11
1950	1950-06-06	1950-09-01
1951	1951-05-16	1951-10-05
1952	1952-06-04	1952-09-13
1953	1953-05-11	1953-09-30
1954	1954-06-01	1954-10-13
1955	1955-05-05	1955-09-20
1956	1956-04-28	1956-09-24
1958	1958-06-01	1958-09-27
1959	1959-05-08	1959-10-07
1960	1960-04-15	1960-09-10
1961	1961-05-10	1961-09-25
1963	1963-04-04	1963-09-20
1964	1964-05-09	1964-09-24
1965	1965-05-04	1965-09-24
1966	1966-05-07	1966-09-04
1969	1969-04-28	1969-09-18
1972	1972-07-03	1972-09-18
1973	1973-06-05	1973-09-06
1974	1974-04-30	1974-09-14
1975	1975-05-23	1975-08-27
1976	1976-04-18	1976-09-15
1977	1977-04-13	1977-09-07
1978	1978-05-21	1978-09-08
1979	1979-05-10	1979-08-31
1980	1980-05-06	1980-09-23
1981	1981-05-23	1981-09-15
1982	1982-06-17	1982-09-13
1983	1983-06-12	1983-09-21
1984	1984-06-07	1984-09-25
1985	1985-04-20	1985-09-11
1986	1986-05-07	1986-10-03
1987	1987-05-11	1987-09-11
1988	1988-05-24	1988-09-24
1989	1989-05-19	1989-09-21
2000	2000-05-06	2000-09-21
2001	2001-04-10	2001-09-14
2002	2002-04-17	2002-10-03
2003	2003-04-17	2003-08-31
2004	2004-04-19	2004-09-24
2005	2005-04-21	2005-09-24
2006	2006-05-29	2006-08-26
2007	2007-05-26	2007-10-10
2008	2008-06-08	2008-09-15
2009	2009-04-26	2009-08-27
2010	2010-04-07	2010-09-26
2011	2011-04-26	2011-09-15
2012	2012-04-17	2012-09-09
2013	2013-04-11	2013-10-06
2014	2014-05-27	2014-09-07
2015	2015-05-13	2015-09-19
2016	2016-04-27	2016-09-24

Every Fixed Threshold

Fixed thresholds at W Chester 2 NW
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	104	80	2005	69
35 C (95 F): Days	80	24	2002	3
40 C (104 F): Days	4	1	1918	1
90 F (32.2 C): Days	104	53	2002	36
100 F (37.8 C): Days	19	5	1955	1
0 C (32 F): Ice days (max	104	49	1904	14
0 C (32 F): Frost days (min	103	145	2002	130
-10 C (14 F): Days with min	103	43	1977	20
-20 C (-4 F): Days with min	21	4	1977	1
20 C (68 F): Tropical nights (min	103	51	1987	28
25 C (77 F): Days with min	14	2	1900	1
10 mm (0.39 in): Days with 10 mm or more rain	101	52	1919	41
25 mm (0.98 in): Days with 25 mm or more rain	101	26	2003	11
50 mm (1.97 in): Days with 50 mm or more rain	88	8	2003	2
100 mm (3.94 in): Days with 100 mm or more rain	20	2	1950	1
200 mm (7.87 in): Days with 200 mm or more rain	1	1	2004	1
10 cm (3.9 in): Days with 10 cm or more snowfall	54	7	1966	2
25 cm (9.8 in): Days with 25 cm or more snowfall	20	2	1958	1
50 cm (19.7 in): Days with 50 cm or more snowfall	4	1	1958	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.

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Data for W Chester 2 NW 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).

W Chester 2 NW Threshold Days by Year (USC00369464)

Key Facts for W Chester 2 NW Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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