1 WSW Princeton Threshold Days by Year (USC00127125)

20 fixed thresholds counted per year at 1 WSW Princeton (USC00127125): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for 1 WSW Princeton Thresholds

1 WSW Princeton: days with 10 mm (0.39 in) or more of precipitation in 129 years, most in 2011 with 56.
1 WSW Princeton: days with 25 mm (0.98 in) or more of precipitation in 129 years, most in 2006 with 26.
1 WSW Princeton: days with a maximum temperature at or above 30 C (86 F) in 124 years, most in 1936 with 119.
1 WSW Princeton: days with a maximum temperature at or above 90 F (32.2 C) in 124 years, most in 1936 with 102.
20 fixed thresholds have at least one qualifying day at 1 WSW Princeton.

Days at or above 30 C (86 F)

124 years with a qualifying day

Days per year at 1 WSW Princeton with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 119 in 1936.

Days at or above 30 C (86 F) per year at 1 WSW Princeton
Year	Days	Decade average
1899	97	97
1900	96	82.2
1901	99	82.2
1902	75	82.2
1903	73	82.2
1904	65	82.2
1905	78	82.2
1906	93	82.2
1907	67	82.2
1908	100	82.2
1909	76	82.2
1910	84	83
1911	101	83
1912	71	83
1913	107	83
1914	102	83
1915	68	83
1916	90	83
1917	60	83
1918	62	83
1919	85	83
1920	61	80.6
1921	102	80.6
1922	60	80.6
1923	78	80.6
1924	77	80.6
1925	101	80.6
1926	102	80.6
1927	63	80.6
1928	82	80.6
1929	80	80.6
1930	89	98.1
1931	106	98.1
1932	97	98.1
1933	105	98.1
1934	105	98.1
1935	85	98.1
1936	119	98.1
1937	97	98.1
1938	96	98.1
1939	82	98.1
1940	85	76.6
1941	117	76.6
1942	85	76.6
1943	83	76.6
1944	93	76.6
1945	55	76.6
1946	53	76.6
1947	70	76.6
1948	62	76.6
1949	63	76.6
1950	29	76.2
1951	76	76.2
1952	101	76.2
1953	115	76.2
1955	92	76.2
1956	84	76.2
1957	68	76.2
1958	54	76.2
1959	67	76.2
1960	61	69.5
1961	68	69.5
1962	65	69.5
1963	76	69.5
1964	87	69.5
1965	75	69.5
1966	75	69.5
1967	46	69.5
1968	68	69.5
1969	74	69.5
1970	90	70.4
1971	73	70.4
1972	77	70.4
1973	78	70.4
1974	49	70.4
1975	71	70.4
1976	56	70.4
1977	82	70.4
1978	79	70.4
1979	49	70.4
1980	86	70.8
1981	56	70.8
1982	50	70.8
1983	86	70.8
1984	73	70.8
1985	55	70.8
1986	74	70.8
1987	98	70.8
1988	81	70.8
1989	49	70.8
1990	55	65.2
1991	91	65.2
1992	45	65.2
1993	71	65.2
1994	69	65.2
1995	86	65.2
1996	51	65.2
1997	51	65.2
1998	65	65.2
1999	68	65.2
2000	47	71.2
2001	71	71.2
2002	99	71.2
2003	55	71.2
2004	57	71.2
2005	89	71.2
2006	72	71.2
2007	106	71.2
2009	45	71.2
2010	106	74.8
2011	73	74.8
2012	90	74.8
2013	53	74.8
2014	50	74.8
2015	66	74.8
2016	76	74.8
2017	66	74.8
2018	94	74.8
2019	74	74.8
2020	66	71.8
2021	69	71.8
2024	73	71.8
2025	77	71.8
2026	74	71.8

For each year, a bar from the first to the last day at 1 WSW Princeton meeting 30 C (86 F).

First to last qualifying date each year at 1 WSW Princeton
Year	First date	Last date
1899	1899-04-27	1899-10-16
1900	1900-05-13	1900-10-05
1901	1901-04-28	1901-09-26
1902	1902-05-03	1902-09-08
1903	1903-05-16	1903-10-03
1904	1904-05-24	1904-09-29
1905	1905-05-10	1905-10-08
1906	1906-05-14	1906-09-21
1907	1907-05-23	1907-09-20
1908	1908-05-16	1908-10-18
1909	1909-05-29	1909-10-03
1910	1910-03-23	1910-10-19
1911	1911-05-09	1911-10-06
1912	1912-05-23	1912-10-11
1913	1913-04-18	1913-10-10
1914	1914-05-11	1914-10-07
1915	1915-04-19	1915-09-26
1916	1916-05-06	1916-10-08
1917	1917-04-20	1917-10-17
1918	1918-05-10	1918-09-10
1919	1919-04-23	1919-10-04
1920	1920-05-23	1920-10-22
1921	1921-05-19	1921-09-29
1922	1922-05-09	1922-09-10
1923	1923-05-30	1923-09-29
1924	1924-04-25	1924-10-19
1925	1925-04-24	1925-09-28
1926	1926-05-01	1926-10-03
1927	1927-05-21	1927-10-28
1928	1928-05-03	1928-10-13
1929	1929-03-24	1929-09-29
1930	1930-04-12	1930-10-14
1931	1931-04-16	1931-10-07
1932	1932-05-04	1932-09-16
1933	1933-05-01	1933-10-30
1934	1934-04-04	1934-10-24
1935	1935-04-25	1935-10-14
1936	1936-04-15	1936-09-22
1937	1937-04-17	1937-10-05
1938	1938-04-26	1938-10-18
1939	1939-05-23	1939-10-23
1940	1940-05-07	1940-10-27
1941	1941-04-12	1941-10-07
1942	1942-04-28	1942-10-08
1943	1943-05-05	1943-10-01
1944	1944-05-12	1944-10-06
1945	1945-05-27	1945-09-24
1946	1946-06-07	1946-09-27
1947	1947-05-15	1947-10-22
1948	1948-06-02	1948-09-20
1949	1949-05-04	1949-08-26
1950	1950-05-23	1950-09-19
1951	1951-04-30	1951-10-05
1952	1952-05-02	1952-10-14
1953	1953-05-21	1953-10-22
1955	1955-05-04	1955-09-30
1956	1956-05-12	1956-09-23
1957	1957-06-11	1957-09-12
1958	1958-05-22	1958-09-26
1959	1959-05-02	1959-10-04
1960	1960-04-24	1960-09-24
1961	1961-06-01	1961-09-24
1962	1962-05-14	1962-10-13
1963	1963-05-08	1963-10-23
1964	1964-05-18	1964-09-21
1965	1965-04-22	1965-09-20
1966	1966-05-08	1966-09-04
1967	1967-05-25	1967-10-04
1968	1968-05-02	1968-10-15
1969	1969-05-28	1969-10-04
1970	1970-04-30	1970-09-26
1971	1971-04-20	1971-10-03
1972	1972-05-21	1972-09-21
1973	1973-06-03	1973-09-26
1974	1974-05-20	1974-09-19
1975	1975-05-19	1975-10-13
1976	1976-04-20	1976-09-19
1977	1977-04-16	1977-09-18
1978	1978-05-24	1978-09-20
1979	1979-05-08	1979-09-12
1980	1980-04-22	1980-10-08
1981	1981-04-27	1981-10-05
1982	1982-05-05	1982-10-06
1983	1983-06-10	1983-10-03
1984	1984-05-19	1984-09-21
1985	1985-05-12	1985-09-22
1986	1986-04-25	1986-10-04
1987	1987-04-21	1987-09-28
1988	1988-05-13	1988-09-22
1989	1989-04-26	1989-10-13
1990	1990-04-24	1990-09-14
1991	1991-05-14	1991-10-04
1992	1992-05-11	1992-10-14
1993	1993-05-08	1993-10-01
1994	1994-05-23	1994-10-01
1995	1995-05-23	1995-09-14
1996	1996-05-17	1996-09-08
1997	1997-05-18	1997-10-04
1998	1998-05-14	1998-10-05
1999	1999-05-17	1999-09-27
2000	2000-05-11	2000-10-03
2001	2001-04-09	2001-09-13
2002	2002-05-27	2002-10-03
2003	2003-06-18	2003-09-13
2004	2004-05-07	2004-09-22
2005	2005-05-10	2005-10-19
2006	2006-04-14	2006-10-04
2007	2007-04-30	2007-10-08
2009	2009-05-15	2009-08-28
2010	2010-04-14	2010-10-11
2011	2011-05-12	2011-09-13
2012	2012-05-02	2012-09-07
2013	2013-05-15	2013-10-04
2014	2014-05-21	2014-10-02
2015	2015-05-06	2015-09-18
2016	2016-05-08	2016-10-06
2017	2017-05-10	2017-10-06
2018	2018-05-10	2018-10-10
2019	2019-05-18	2019-10-03
2020	2020-05-25	2020-10-09
2021	2021-04-10	2021-10-10
2024	2024-04-16	2024-09-22
2025	2025-06-04	2025-10-04
2026	2026-03-23	2026-10-14

Every Fixed Threshold

Fixed thresholds at 1 WSW Princeton
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	124	119	1936	74
35 C (95 F): Days	114	66	1936	12
40 C (104 F): Days	13	19	1936	8
45 C (113 F): Days	1	1	1936	1
90 F (32.2 C): Days	124	102	1936	44
100 F (37.8 C): Days	47	40	1936	3
110 F (43.3 C): Days	3	5	1936	5
0 C (32 F): Ice days (max	124	51	1978	15
0 C (32 F): Frost days (min	123	136	2013	49
-10 C (14 F): Days with min	122	41	1977	14
-20 C (-4 F): Days with min	59	8	1936	3
20 C (68 F): Tropical nights (min	123	81	1921	62
25 C (77 F): Days with min	49	6	1936	1
10 mm (0.39 in): Days with 10 mm or more rain	129	56	2011	26
25 mm (0.98 in): Days with 25 mm or more rain	129	26	2006	12
50 mm (1.97 in): Days with 50 mm or more rain	113	10	2018	4
100 mm (3.94 in): Days with 100 mm or more rain	21	2	2002	1
200 mm (7.87 in): Days with 200 mm or more rain	2	1	1905	1
10 cm (3.9 in): Days with 10 cm or more snowfall	49	8	1912	1
25 cm (9.8 in): Days with 25 cm or more snowfall	10	1	1904	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1899.

Download the Data

Data for 1 WSW Princeton 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 2026-10-17. Last revised 17 October 2026 (2026-10-17).

1 WSW Princeton Threshold Days by Year (USC00127125)

Key Facts for 1 WSW Princeton Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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