Trenton, NJ: September

30 September 2026: September 2026 averaged 68.6°F in Trenton, NJ, the warmest September since 2025, tied 33rd warmest of 133 (with 2008, 1998, 1941 and 2 other years).

September 2026

Mean temperature: 68.6°F; Warmest since 2025; 33rd warmest of 133
Precipitation: 5.59 in; Wettest since 2023; 32nd wettest of 154

A normal September in Trenton, NJ (1991 to 2020): a mean temperature of 67.1°F, between 64.9°F and 70.7°F in eight years of ten and 3.85 in of precipitation, between 1.65 in and 6.99 in in eight years of ten.

The mean temperature of every September in Trenton, NJ since 1893: 68.6°F in 2026; the highest is 73.1°F, in 1895.

Normal range, 64.9 to 70.7°F

Every year, ranked, as a table

Every September in Trenton, NJ from 1865 to 2026, ranked: the mean temperature, the mean high and the mean low from the warmest, the precipitation from the wettest; a year missing more than a tenth of its days is not ranked.

Year	Mean, °F	Rank	High, °F	Rank	Low, °F	Rank	Precipitation, in	Rank	Days missing
2026	68.6	33	76.8	61	60.4	21	5.59	32	0
2025	69.1	25	79.4	22	58.7	50	1.89	121	0
2024	66.8	75	76.4	71	57.3	75	0.43	152	0
2023	67.9	48	76.6	63	59.2	42	6.65	23	0
2022	67.5	57	77.2	53	57.8	67	2.43	100	0
2021	68.2	42	77.5	44	58.9	46	7.79	10	0
2020	66.4	85	76	82	56.7	89	5.42	36	0
2019	69	27	79.7	18	58.3	56	2.17	108	0
2018	71.1	6	78.4	32	63.7	3	6.93	17	0
2017	69.2	24	78.6	31	59.8	30	1.86	122	0
2016	70.6	11	81.2	7	60	24	2.38	103	0
2015	71.5	4	81.9	4	61.1	14	3.68	72	0
2014	67.5	57	77.8	37	57.2	78	1.05	146	0
2013	64.9	112	75.8	89	53.9	126	1.58	133	0
2012	67.2	67	76.5	67	57.9	64	2.42	102	0
2011	70	16	77.8	37	62.2	6	6.89	19	0
2010	70.8	7	81.7	5	60	24	3.05	84	0
2009	65.4	102	74	124	56.8	85	4.55	50	0
2008	68.6	33	77.8	37	59.3	38	6.43	25	0
2007	69	27	80.8	11	57.3	75	0.59	151	0
2006	65.3	105	74.2	119	56.3	95	4.36	55	0
2005	70.7	10	82.1	3	59.3	38	2.94	85	0
2004	67.9	48	77.4	48	58.3	56	7.67	11	0
2003	66.7	79	74.8	111	58.6	51	5.73	31	0
2002	68	47	78.7	28	57.2	78	4.26	58	0
2001	65.1	110	76	82	54.2	121	2.22	107	0
2000	63.6	124	72.9	140	54.2	121	5.87	29	0
1999	66.9	73	75.8	89	58	60	11.22	1	0
1998	68.6	33	79.8	17	57.4	73	1.76	123	0
1997	64.3	118	74.6	113	54	123	1.66	130	0
1996	66.6	81	75.2	102	58	60	4.75	45	0
1995	65.9	93	75.4	98	56.4	94	5.44	34	0
1994	64.8	114	76.3	72	53.2	128	2.62	94	0
1993	65.9	93	76.6	63	55.1	111	7.51	13	0
1992	65.6	97	76.3	72	54.9	114	2.90	87	0
1991	65.4	102	77.9	36	52.9	132	4.02	64	0
1990	64.5	115	74.2	119	54.9	114	2.13	111	0
1989	66.2	87	76.2	79	56.2	98	8.50	6	0
1988	63.5	125	73.9	128	53	129	2.15	110	0
1987	65.6	97	75.6	92	55.6	106	4.42	53	0
1986	64.4	116	74	124	54.7	119	1.67	129	0
1985	66.8	75	79.6	20	54	123	4.87	42	0
1984	61.8	133	74.3	116	49.3	133	2.49	99	0
1983	67.9	48	80.9	10	54.9	114	3.63	73	0
1982	65.5	99	75.5	95	55.4	110	3.98	65	0
1981	66.7	79	74.1	123	59.4	37	3.71	71	0
1980	70.3	15	79.2	23	61.3	11	2.09	113	0
1979	67.4	61	75.2	102	59.6	32	5.43	35	0
1978	65.5	99	74.4	115	56.6	90	2.93	86	0
1977	68.5	39	76	82	60.9	18	4.81	44	0
1976	66.2	87	75.5	95	57	83	2.57	96	0
1975	64.1	122	72.1	143	56.2	98	9.04	4	0
1974	66.2	87	74.9	110	57.4	73	5.80	30	0
1973	68.9	32	78.4	32	59.5	35	3.83	70	0
1972	68.3	40	76.6	63	59.9	27	1.64	131	0
1971	69.8	18	76.3	72	63.4	4	5.59	32	0
1970	70.4	14	79.5	21	61.3	11	0.79	149	0
1969	67.3	62	75.6	92	59.1	44	6.66	22	0
1968	69.3	23	78.7	28	59.9	27	1.19	142	0
1967	65.3	105	74.5	114	56	101	2.16	109	0
1966	65.5	99	73	137	58	60	8.41	7	0
1965	68.1	45	76.9	59	59.3	38	2.65	93	0
1964	67.1	70	77.3	50	56.9	84	4.58	48	0
1963	62.6	130	71.9	148	53.3	127	4.42	53	0
1962	63.5	125	72	145	55	113	5.04	41	0
1961	72.9	2	81.6	6	64.1	1	1.72	127	0
1960	66.6	81	74.8	111	58.5	55	6.70	21	0
1959	70.6	11	80.2	13	61	16	1.28	141	0
1958	66.1	90	75.7	91	56.5	93	3.06	83	0
1957	69	27	77.4	48	60.6	20	2.11	112	0
1956	64.3	118	72.8	142	55.7	103	2.24	105	0
1955	66.4	85	75	107	57.8	67	1.75	124	0
1954	67	71	75.4	98	58.6	51	5.11	39	0
1953	68.1	45	78.1	35	58	60	1.74	126	0
1952	67.9	48	77.5	44	58.2	58	3.36	80	0
1951	66.9	73	77.1	57	56.6	90	1.11	143	0
1950	63.1	128	69.9	154	56.3	95	2.71	91	0
1949	64.2	121	72.9	140	55.6	106	4.19	59	0
1948	67.5	57	77.5	44	57.5	71	1.59	132	0
1947	67.3	62	76	82	58.6	51	1.90	119	0
1946	69.1	25	79	24	59.2	42	1.95	117	0
1945	69.4	21	77.3	50	61.4	10	5.21	38	0
1944	67.9	48	76	82	59.7	31	7.60	12	0
1943	65.7	96	75.5	95	55.8	102	1.56	135	0
1942	67.3	62	76.5	67	58.2	58	2.09	113	0
1941	68.6	33	80	15	57.2	78	0.19	154	0
1940	64.9	112	74.3	116	55.5	108	6.17	26	0
1939	67.3	62	77.2	53	57.3	75	1.48	138	0
1938	64.4	116	73.4	134	55.5	108	9.04	4	0
1937	64.3	118	73.8	131	54.8	118	1.90	119	0
1936	67.6	54	76.3	72	58.9	46	4.30	57	0
1935	64	123	73.2	136	54.9	114	5.42	36	0
1934	68.2	42	76.3	72	60	24	10.49	2	0
1933	69	27	77.3	50	60.7	19	4.86	43	0
1932	67.6	54	77.6	42	57.6	69	2.70	92	0
1931	71.3	5	80.8	11	61.9	7	1.06	144	0
1930	70.8	7	80.2	13	61.3	11	1.55	136	0
1929	67.7	53	77.6	42	57.9	64	7.14	16	0
1928	63.3	127	70.9	153	55.7	103	3.42	78	0
1927	66.8	75	76.9	59	56.6	90	2.03	115	0
1926	65.1	110	73	137	57.2	78	4.57	49	0
1925	68.6	33	77.5	44	59.6	32	3.91	66	0
1924	63.1	128	71.8	149	54.4	120	5.94	27	0
1923	67.6	54	76.1	81	59.1	44	4.19	59	0
1922	67.2	67	77.2	53	57.1	82	1.75	124	0
1921	70.6	11	79.7	18	61.6	9	1.69	128	0
1920	67.2	67	76.5	67	57.9	64	2.23	106	0
1919	66	92	75.2	102	56.8	85	2.74	90	0
1918	62.5	131	72.1	143	53	129	3.20	81	0
1917	62	132	71	152	53	129	3.89	67	0
1916	66.1	90	76.5	67	55.7	103	2.51	97	0
1915	69.4	21	78.9	26	59.9	27	0.62	150	0
1914	65.2	108	76.3	72	54	123	0.41	153	0
1913	65.2	108	74.2	119	56.3	95	4.66	46	0
1912	68.3	40	79	24	57.5	71	2.90	87	0
1910	69.9	17	81	9	58.8	48	2.50	98	0
1909	65.4	102	74	124	56.8	85	3.54	74	0
1908	65.9	93	75.6	92	56.2	98	2.60	95	0
1907	67.5	57	75.4	98	59.5	35	6.81	20	0
1906	69.5	20	78.8	27	60.2	22	0.89	147	0
1905	67.3	62	76	82	58.8	48	4.65	47	2
1904	66.6	81	75.2	102	57.6	69	5.10	40	1
1903	66.5	84	74.3	116	58.6	51	4.50	52	0
1902	66.8	75	74	124	59.3	38	5.88	28	1
1901	68.6	33	75.9	88	61.1	14	4.13	61	2
1900	70.8	7	77.7	41	63.9	2	3.86	68	0
1899	67	71	76.6	63	56.8	85	4.06	63	2
1898	72	3	81.1	8	62.7	5	1.35	139	2
1897	69	27	78.4	32	60.2	22	1.06	144	2
1896	68.2	42	76.8	61	59.6	32	4.12	62	1
1895	73.1	1	84	1	61.8	8	0.86	148	2
1894	69.8	18	78.7	28	61	16	6.93	17	0
1893	65.3	105	75.3	101	55.1	111	3.17	82	2
1892			76.3	72			1.92	118	30
1891			79.9	16			2.82	89	30
1890			75	107			4.31	56	30
1889			73.9	128			10.21	3	30
1888			73	137			7.80	9	30
1887			72	145			3.84	69	30
1880			77.8	37			4.52	51	30
1879			73.4	134			1.50	137	30
1878			77	58			3.40	79	30
1877			75.2	102			3.45	76	30
1876			71.5	151			7.23	15	30
1875			73.8	131			2.37	104	30
1874			76.2	79			6.44	24	30
1873			74.2	119			3.44	77	30
1872			75	107			2.43	100	30
1871			68.9	155			1.57	134	30
1870			77.2	53			1.34	140	30
1869			73.8	131			1.98	116	30
1868			71.7	150			7.25	14	30
1867			72	145			3.47	75	30
1866			73.9	128			7.88	8	30
1865			82.3	2					30

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1895	73.1
1961	72.9
1898	72
2015	71.5
1931	71.3
2018	71.1
2010	70.8
1930	70.8
1900	70.8
2005	70.7

Coldest
Year	Mean, °F
1984	61.8
1917	62
1918	62.5
1963	62.6
1950	63.1
1924	63.1
1928	63.3
1988	63.5
1962	63.5
2000	63.6

Wettest
Year	Precipitation, in
1999	11.22
1934	10.49
1889	10.21
1975	9.04
1938	9.04
1989	8.50
1966	8.41
1866	7.88
1888	7.80
2021	7.79

Driest
Year	Precipitation, in
1941	0.19
1914	0.41
2024	0.43
2007	0.59
1915	0.62
1970	0.79
1895	0.86
1906	0.89
2014	1.05
1931	1.06
More years share the last value

The hottest, coldest and wettest days

Hottest day: 88°F; 3 September 2026, 1 September 2026
Coldest night: 50°F; 24 September 2026
Wettest day: 1.40 in; 27 September 2026

Every month, season and year

Months

Seasons

Years

Trenton, NJ the day's answers

All-time records

Every answer in words

September 2026 brought 5.59 in of precipitation in Trenton, NJ, the wettest September since 2023, tied 32nd wettest of 154 (with 1971).
The hottest day of September 2026 in Trenton, NJ: 88°F on Thursday 3 September 2026 and Tuesday 1 September 2026.
The coldest night of September 2026 in Trenton, NJ: a low of 50°F on Thursday 24 September 2026.
The wettest day of September 2026 in Trenton, NJ: 1.40 in on Sunday 27 September 2026.