Princeton Threshold Days by Year (USC00236866)

19 fixed thresholds counted per year at Princeton (USC00236866): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Princeton Thresholds

Princeton: days with 10 mm (0.39 in) or more of precipitation in 71 years, most in 1993 with 50.
Princeton: days with 25 mm (0.98 in) or more of precipitation in 71 years, most in 1902 with 20.
Princeton: days with a maximum temperature at or above 30 C (86 F) in 68 years, most in 1953 with 112.
Princeton: days with a maximum temperature at or above 90 F (32.2 C) in 68 years, most in 1953 with 82.
19 fixed thresholds have at least one qualifying day at Princeton.

Days at or above 30 C (86 F)

68 years with a qualifying day

Days per year at Princeton with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 112 in 1953.

Days at or above 30 C (86 F) per year at Princeton
Year	Days	Decade average
1893	69	79.1
1894	100	79.1
1895	82	79.1
1896	65	79.1
1897	86	79.1
1898	75	79.1
1899	77	79.1
1900	89	66.8
1902	54	66.8
1903	44	66.8
1904	60	66.8
1905	69	66.8
1906	85	66.8
1953	112	85.3
1954	98	85.3
1955	83	85.3
1956	109	85.3
1957	59	85.3
1958	55	85.3
1959	81	85.3
1960	61	65.2
1961	61	65.2
1962	82	65.2
1963	87	65.2
1964	77	65.2
1965	51	65.2
1966	58	65.2
1967	42	65.2
1968	63	65.2
1969	70	65.2
1970	60	56.3
1972	67	56.3
1974	42	56.3
1975	64	56.3
1976	63	56.3
1977	53	56.3
1978	54	56.3
1979	47	56.3
1980	76	65.3
1983	84	65.3
1984	65	65.3
1985	50	65.3
1986	47	65.3
1987	56	65.3
1988	90	65.3
1989	54	65.3
1990	47	32.3
1991	57	32.3
1992	14	32.3
1993	21	32.3
1994	30	32.3
1995	31	32.3
1996	14	32.3
1997	35	32.3
1998	34	32.3
1999	40	32.3
2000	44	56.5
2002	69	56.5
2013	49	55
2016	49	55
2017	55	55
2018	74	55
2019	48	55
2020	43	51.6
2021	51	51.6
2022	50	51.6
2023	49	51.6
2026	65	51.6

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

First to last qualifying date each year at Princeton
Year	First date	Last date
1893	1893-05-20	1893-10-01
1894	1894-04-28	1894-10-23
1895	1895-03-27	1895-09-25
1896	1896-04-15	1896-08-30
1897	1897-05-18	1897-10-15
1898	1898-05-18	1898-10-02
1899	1899-05-15	1899-10-22
1900	1900-05-11	1900-10-15
1902	1902-04-20	1902-09-07
1903	1903-05-22	1903-09-07
1904	1904-05-21	1904-10-09
1905	1905-04-09	1905-09-27
1906	1906-04-24	1906-09-25
1953	1953-04-22	1953-10-18
1954	1954-04-06	1954-10-03
1955	1955-05-02	1955-09-18
1956	1956-04-27	1956-10-13
1957	1957-06-05	1957-09-01
1958	1958-05-11	1958-09-25
1959	1959-05-01	1959-09-20
1960	1960-04-22	1960-10-12
1961	1961-05-31	1961-09-10
1962	1962-05-05	1962-10-14
1963	1963-05-08	1963-10-19
1964	1964-04-16	1964-09-09
1965	1965-04-23	1965-09-10
1966	1966-04-19	1966-09-10
1967	1967-04-16	1967-10-04
1968	1968-05-01	1968-10-14
1969	1969-05-27	1969-10-04
1970	1970-04-28	1970-09-21
1972	1972-05-20	1972-09-20
1974	1974-06-14	1974-08-26
1975	1975-05-18	1975-10-13
1976	1976-06-08	1976-10-02
1977	1977-05-26	1977-08-27
1978	1978-05-26	1978-10-21
1979	1979-06-03	1979-10-08
1980	1980-04-21	1980-09-21
1983	1983-06-09	1983-10-03
1984	1984-05-18	1984-09-24
1985	1985-04-18	1985-09-19
1986	1986-03-29	1986-09-28
1987	1987-04-19	1987-09-26
1988	1988-05-12	1988-09-23
1989	1989-04-22	1989-10-13
1990	1990-06-12	1990-10-05
1991	1991-05-14	1991-09-14
1992	1992-06-16	1992-08-25
1993	1993-06-16	1993-09-12
1994	1994-05-24	1994-09-30
1995	1995-06-20	1995-08-31
1996	1996-05-17	1996-08-06
1997	1997-06-19	1997-10-03
1998	1998-05-19	1998-09-25
1999	1999-06-04	1999-09-07
2000	2000-05-11	2000-09-18
2002	2002-04-16	2002-10-02
2013	2013-05-15	2013-09-28
2016	2016-05-31	2016-10-18
2017	2017-05-16	2017-10-03
2018	2018-05-15	2018-10-04
2019	2019-05-17	2019-10-02
2020	2020-06-03	2020-09-27
2021	2021-06-06	2021-10-01
2022	2022-05-10	2022-09-21
2023	2023-04-05	2023-10-03
2026	2026-03-26	2026-10-13

Every Fixed Threshold

Fixed thresholds at Princeton
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	68	112	1953	65
35 C (95 F): Days	64	46	1894	12
40 C (104 F): Days	10	9	1954	5
90 F (32.2 C): Days	68	82	1953	35
100 F (37.8 C): Days	30	22	1988	3
110 F (43.3 C): Days	1	1	1984	1
0 C (32 F): Ice days (max	68	66	1978	17
0 C (32 F): Frost days (min	68	146	1978	54
-10 C (14 F): Days with min	68	67	1985	22
-20 C (-4 F): Days with min	66	25	1963	5
-30 C (-22 F): Days with min	11	3	1899	1
20 C (68 F): Tropical nights (min	68	53	1900	42
25 C (77 F): Days with min	25	6	1897	1
10 mm (0.39 in): Days with 10 mm or more rain	71	50	1993	30
25 mm (0.98 in): Days with 25 mm or more rain	71	20	1902	12
50 mm (1.97 in): Days with 50 mm or more rain	57	6	1898	4
100 mm (3.94 in): Days with 100 mm or more rain	10	1	1902	2
10 cm (3.9 in): Days with 10 cm or more snowfall	36	5	1960	1
25 cm (9.8 in): Days with 25 cm or more snowfall	1	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.

Download the Data

Data for 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).

Princeton Threshold Days by Year (USC00236866)

Key Facts for Princeton Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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