Rockford, IL: September

30 September 2026: September 2026 averaged 68°F in Rockford, IL, the warmest September since 2021, tied 18th warmest of 126 (with 1948).

September 2026

Mean temperature: 68°F; Warmest since 2021; 18th warmest of 126
Precipitation: 7.40 in; Wettest since 2019; 15th wettest of 126

A normal September in Rockford, IL (1991 to 2020): a mean temperature of 63.7°F, between 61.1°F and 68.4°F in eight years of ten and 2.80 in of precipitation, between 1.62 in and 6.74 in in eight years of ten.

The mean temperature of every September in Rockford, IL since 1893: 68°F in 2026; the highest is 71.2°F, in 1895.

Normal range, 61.1 to 68.4°F

Every year, ranked, as a table

Every September in Rockford, IL from 1893 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	18	77.6	33	58.4	6	7.40	15	0
2025	66.5	29	79.6	20	53.4	56	1.05	113	0
2024	67	24	80.7	12	53.3	59	2.05	85	0
2023	67	24	77.4	36	56.6	14	2.19	82	0
2022	64.5	51	75.2	63	53.8	48	5.84	28	0
2021	68.9	9	82.7	3	55.2	27	0.53	120	0
2020	63.3	75	73.7	88	52.8	62	6.61	18	0
2019	68.5	11	76.8	45	60.2	2	9.10	6	0
2018	66.5	29	77.1	37	55.9	18	5.57	30	0
2017	66.5	29	79.1	25	53.8	48	0.51	121	0
2016	69.3	4	79.1	25	59.5	3	2.97	64	0
2015	69	6	79.4	22	58.7	4	3.28	59	0
2014	62.6	90	74.1	82	51.1	92	2.00	90	0
2013	66.5	29	78.4	27	54.5	35	1.61	103	0
2012	62.9	86	76.4	49	49.5	111	1.74	97	0
2011	61.4	104	70.9	121	52	74	5.33	34	0
2010	64.7	49	75.5	60	53.9	45	1.89	91	0
2009	63.9	61	75	67	52.8	62	1.69	100	0
2008	65.7	39	75.8	57	55.5	23	6.36	21	0
2007	66.9	27	80	17	53.9	45	2.04	87	0
2006	60.8	114	70.8	122	50.8	94	2.91	66	0
2005	68.4	14	80.1	16	56.6	14	1.86	93	0
2004	65.3	42	78.3	29	52.3	70	0.25	125	0
2003	62.9	86	75.1	66	50.7	96	2.02	88	0
2002	66	36	78.4	27	53.6	52	2.68	71	0
2001	61.1	110	71.7	113	50.4	101	9.19	5	0
2000	63.5	70	74.8	74	52.2	72	7.92	11	0
1999	61.3	105	74.9	70	47.7	121	5.29	35	0
1998	66.6	28	78.3	29	54.8	33	2.61	75	0
1997	63.1	81	74.5	79	51.7	81	1.79	96	0
1996	62.4	95	73.2	98	51.6	82	1.62	102	0
1995	60.4	118	72	110	48.8	114	2.01	89	0
1994	64.6	50	74.9	70	54.2	41	4.06	45	0
1993	58.3	124	67.8	127	48.9	113	3.72	51	0
1992	61.2	107	71.8	112	50.7	96	5.44	32	0
1991	63.2	78	75	67	51.3	88	4.59	41	0
1990	65.3	42	76.5	48	54.2	41	0.85	117	0
1989	60.5	116	72.2	108	48.8	114	1.86	93	0
1988	65.3	42	78.3	29	52.3	70	2.29	80	0
1987	62.7	88	74.1	82	51.4	87	2.38	78	0
1986	64.8	48	74.5	79	55.2	27	9.89	4	0
1985	64	59	74	85	54	43	2.81	67	0
1984	61.6	102	73.5	90	49.7	107	1.54	106	0
1983	63.3	75	75	67	51.6	82	3.80	50	0
1982	61.7	101	72.9	101	50.6	98	1.70	99	0
1981	62.5	92	73.4	93	51.6	82	3.51	54	0
1980	64.2	56	75.2	63	53.2	60	6.13	24	0
1979	63	84	76.3	55	49.7	107	0.05	126	0
1978	68.1	15	80.5	14	55.7	20	4.33	44	0
1977	63.4	72	72.9	101	53.9	45	3.91	48	0
1976	60	121	74.1	82	45.8	126	1.39	109	0
1975	58	125	69.9	125	46.1	125	0.91	116	0
1974	60.1	120	72	110	48.1	120	0.35	124	0
1973	64.2	56	72.9	101	55.6	22	8.52	8	0
1972	63.3	75	72.2	108	54.4	39	6.51	20	0
1971	68.1	15	79.3	23	56.9	12	2.36	79	0
1970	63.6	68	73.3	97	53.8	48	10.63	2	0
1969	63.1	81	73.4	93	52.7	65	1.87	92	0
1968	63.2	78	73.4	93	53	61	6.76	17	0
1967	62.4	95	73.7	88	51	93	3.11	61	0
1966	62.5	92	74.5	79	50.5	100	1.18	110	0
1965	62.2	97	70.7	123	53.6	52	8.23	10	0
1964	62.7	88	74	85	51.3	88	3.32	58	0
1963	64	59	75.5	60	52.5	69	3.95	46	0
1962	60.5	116	71.3	117	49.7	107	1.73	98	0
1961	65.1	46	75.7	58	54.5	35	10.68	1	0
1960	66.4	33	76.3	55	56.5	16	4.56	42	0
1959	65.8	38	76.9	44	54.7	34	4.73	38	0
1958	63.4	72	74.8	74	52	74	2.40	77	0
1957	61.2	107	72.8	104	49.6	110	0.63	119	0
1956	62.1	98	75.6	59	48.6	116	0.50	122	0
1955	65	47	78	32	52	74	2.62	73	0
1954	65.7	39	77.5	34	54	43	2.92	65	0
1953	63.7	65	77.5	34	49.8	105	2.68	71	0
1952	63.5	70	77	40	50	104	0.94	114	0
1951	60.4	118	71	119	49.8	105	2.99	63	0
1950	62.5	92	73	100	52	74	5.85	27	0
1949	59.4	122	71.6	114	47.1	122	2.25	81	0
1948	68	18	81.2	8	54.9	32	1.83	95	0
1947	67.5	22	79.8	19	55.2	27	2.78	68	0
1945	63.7	65	74.8	74	52.7	65	8.58	7	0
1944	65.9	37	76.6	47	55.3	25	2.62	73	0
1943	60.6	115	72.7	106	48.6	116	1.61	103	0
1942	61.9	100	72.4	107	51.3	88	6.04	25	0
1941	67	24	79.6	20	54.5	35	10.26	3	0
1940	63.7	65	77	40	50.4	101	0.37	123	0
1939	69.2	5	83.1	1	55.2	27	1.65	101	0
1938	64.3	55	75.2	63	53.4	56	7.56	14	0
1937	63.6	68	76.4	49	50.8	94	2.51	76	0
1936	66.3	34	76.8	45	55.7	20	7.86	12	0
1935	64.5	51	77	40	52	74	2.69	70	0
1934	63.1	81	73.5	90	52.7	65	3.84	49	0
1933	69	6	81.2	8	56.8	13	3.06	62	1
1932	62.6	90	77	40	48.2	119	2.05	85	0
1931	69.9	3	81.4	7	58.3	8	4.54	43	0
1930	66.3	34	80.5	14	52.1	73	4.61	40	0
1929	63	84	75.3	62	50.6	98	4.97	36	0
1928	60.9	111	74.9	70	46.9	123	1.53	107	0
1927	67.9	20	80	17	55.9	18	7.59	13	0
1926	63.2	78	72.8	104	53.6	52	5.61	29	0
1925	69	6	80.9	10	57	11	5.91	26	0
1924	58.7	123	71	119	46.4	124	2.08	84	0
1923	64.2	56	76.4	49	52	74	3.44	55	0
1922	67.2	23	81.6	6	52.8	62	1.50	108	0
1921	68.5	11	80.8	11	56.3	17	6.27	22	0
1920	68.5	11	81.9	5	55.1	31	0.77	118	0
1919	65.2	45	77.1	37	53.4	56	6.14	23	0
1918	57.4	126	69.5	126	45.2	127	1.60	105	0
1917	62.1	98	74.8	74	49.4	112	3.24	60	0
1916	61.6	102	74.9	70	48.5	118	7.00	16	1
1915	65.5	41	76.4	49	54.5	35	5.57	30	0
1914	64.5	51	76.4	49	52.6	68	3.92	47	0
1913	63.9	61	76.4	49	51.5	86	3.67	52	0
1912	64.4	54	73.5	90	55.3	25	3.53	53	0
1911	63.8	63	73.8	87	53.7	51	6.56	19	0
1910	61.2	107	71.1	118	51.6	82	2.12	83	1
1909	60.9	111	71.4	116	50.4	101	3.41	56	0
1908	68.1	15	80.7	12	55.4	24	0.92	115	0
1907	61.3	105	70.6	124	52	74	4.84	37	0
1906	68.8	10	79.2	24	58.4	6	4.69	39	0
1905	67.6	21	77.1	37	58.2	9	1.16	112	0
1904			74.7	78	57.1	10	3.39	57	4
1903	63.4	72	73.2	98	53.6	52	5.39	33	1
1897	70.7	2	82.8	2	58.5	5	1.18	110	0
1896	60.9	111	71.6	114	51.2	91	8.33	9	2
1895	71.2	1	82	4	60.4	1	2.77	69	0
1893	63.8	63	73.4	93	54.3	40			1

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1895	71.2
1897	70.7
1931	69.9
2016	69.3
1939	69.2
2015	69
1933	69
1925	69
2021	68.9
1906	68.8

Coldest
Year	Mean, °F
1918	57.4
1975	58
1993	58.3
1924	58.7
1949	59.4
1976	60
1974	60.1
1995	60.4
1951	60.4
1989	60.5
More years share the last value

Wettest
Year	Precipitation, in
1961	10.68
1970	10.63
1941	10.26
1986	9.89
2001	9.19
2019	9.10
1945	8.58
1973	8.52
1896	8.33
1965	8.23

Driest
Year	Precipitation, in
1979	0.05
2004	0.25
1974	0.35
1940	0.37
1956	0.50
2017	0.51
2021	0.53
1957	0.63
1920	0.77
1990	0.85

The hottest, coldest and wettest days

Hottest day: 96°F; 2 September 2026
Coldest night: 44°F; 14 September 2026
Wettest day: 2.63 in; 19 September 2026

Every month, season and year

Months

Seasons

Years

Rockford, IL the day's answers

All-time records

Every answer in words

September 2026 brought 7.40 in of precipitation in Rockford, IL, the wettest September since 2019, 15th wettest of 126.
The hottest day of September 2026 in Rockford, IL: 96°F on Wednesday 2 September 2026.
The coldest night of September 2026 in Rockford, IL: a low of 44°F on Monday 14 September 2026.
The wettest day of September 2026 in Rockford, IL: 2.63 in on Saturday 19 September 2026.