Peoria, IL: September

30 September 2026: September 2026 averaged 71.8°F in Peoria, IL, the warmest September since 2019, tied 6th warmest of 144 (with 1939 and 1897).

September 2026

Mean temperature: 71.8°F; Warmest since 2019; 6th warmest of 144
Precipitation: 3.09 in; Wettest since 2020; 70th wettest of 144

A normal September in Peoria, IL (1991 to 2020): a mean temperature of 66.4°F, between 63.5°F and 71.2°F in eight years of ten and 3.19 in of precipitation, between 1.24 in and 6.01 in in eight years of ten.

The mean temperature of every September in Peoria, IL since 1883: 71.8°F in 2026; the highest is 73.5°F, in 2015.

Normal range, 63.5 to 71.2°F

Every year, ranked, as a table

Every September in Peoria, IL from 1883 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	71.8	6	80.5	31	63.2	2	3.09	70	0
2025	70	23	83.1	10	57	52	0.09	143	0
2024	70	23	81.7	19	58.3	26	0.72	140	0
2023	70.1	21	80.1	34	60	14	2.05	101	0
2022	68.1	49	79.1	51	57.2	48	0.79	138	0
2021	71.3	11	82.7	13	59.9	18	1.09	129	0
2020	65.2	102	75.2	108	55.2	81	5.84	19	0
2019	72.3	5	81.4	22	63.1	3	7.68	8	0
2018	70.6	16	81.2	23	60	14	2.76	80	0
2017	69.7	29	81.9	17	57.5	41	0.54	141	0
2016	71.2	12	81	25	61.4	7	4.07	47	0
2015	73.5	1	84.7	4	62.2	4	3.25	64	0
2014	66.3	72	76.8	79	55.8	70	4.98	32	0
2013	70.2	20	82.3	14	58.2	29	1.85	103	0
2012	64.4	111	75.5	101	53.2	114	3.32	62	0
2011	62.9	131	73	135	52.9	120	3.62	53	0
2010	66.9	62	77.2	77	56.5	61	5.04	30	0
2009	66.3	72	75.1	111	57.4	45	3.53	56	0
2008	67.5	59	76.6	86	58.5	24	12.34	2	0
2007	70.9	15	83.5	6	58.3	26	1.53	117	0
2006	64.3	114	74.5	122	54	100	1.67	111	0
2005	71.6	10	83.2	8	60	14	3.91	48	0
2004	67.9	52	79.7	43	56.1	67	0.99	132	0
2003	63.6	127	74.3	127	52.8	121	1.53	117	0
2002	68.7	40	80.6	28	56.7	57	0.78	139	0
2001	64	119	74.4	125	53.5	111	4.15	45	0
2000	66.5	69	78.9	53	54.1	97	2.64	84	0
1999	64.1	118	76.5	88	51.7	133	1.54	116	0
1998	70.4	19	80.6	28	60.1	12	2.30	97	0
1997	66.1	81	76.2	90	56	69	3.13	68	0
1996	64.4	111	75.3	104	53.5	111	1.62	113	0
1995	62.7	133	74.7	118	50.7	136	1.47	119	0
1994	66.6	66	78.4	60	54.9	85	1.27	124	0
1993	61.4	138	70.7	143	52	128	7.56	10	0
1992	64.2	117	75	114	53.3	113	5.81	21	0
1991	65.3	100	76.8	79	53.9	105	3.59	54	0
1990	66.1	81	76.4	89	55.8	70	1.03	131	0
1989	62.2	136	72.4	139	52	128	2.87	77	0
1988	68.2	46	80.8	27	55.6	75	2.82	78	0
1987	65.7	88	77.3	74	54	100	1.62	113	0
1986	68.9	37	79	52	58.8	22	6.39	15	0
1985	66.6	66	76.6	86	56.5	61	3.43	60	0
1984	63.9	121	74.7	118	53.2	114	2.38	93	0
1983	67.9	52	80	37	55.8	70	5.08	29	0
1982	64.9	105	75.1	111	54.6	89	1.24	125	0
1981	65.9	83	76.7	83	55	84	1.31	121	0
1980	67.8	55	78.7	55	57	52	4.09	46	0
1979	65.6	92	79.2	48	51.9	131	0.03	144	0
1978	70.5	17	83.2	8	57.8	34	2.32	95	0
1977	66.4	71	76.1	94	56.7	57	6.26	16	0
1976	63.3	129	76.2	90	50.3	139	1.78	105	0
1975	60.9	141	71.3	141	50.4	138	2.74	81	0
1974	61.1	140	73.3	134	48.9	142	1.45	120	0
1973	66.9	62	76.2	90	57.7	36	7.58	9	0
1972	66.2	75	75.1	111	57.3	46	5.21	28	0
1971	68.9	37	79.8	42	57.9	33	3.07	71	0
1970	65.7	88	76.1	94	55.4	77	11.49	5	0
1969	64.8	106	74.9	115	54.6	89	3.31	63	0
1968	64.3	114	75.5	101	53.1	117	4.83	40	0
1967	63.2	130	74	128	52.5	125	2.72	82	0
1966	63.8	123	74.5	122	53.1	117	3.06	72	0
1965	64.6	109	73.6	130	55.7	73	8.17	7	0
1964	65.4	96	76.8	79	54	100	3.63	52	0
1963	65.2	102	76.8	79	53.6	109	1.76	109	0
1962	62.5	134	74.4	125	50.7	136	1.29	123	0
1961	66.2	75	76.7	83	55.7	73	13.09	1	0
1960	68.3	43	78.1	66	58.5	24	2.82	78	0
1959	68	50	78.5	57	57.6	37	3.51	57	0
1958	65.8	84	76.1	94	55.4	77	3.15	66	0
1957	64.8	106	75.7	99	53.9	105	1.21	126	0
1956	65.5	95	77.9	68	53	119	0.41	142	0
1955	67.6	57	78.9	53	56.3	64	2.62	86	0
1954	69	35	81	25	57.1	50	0.93	133	0
1953	67.2	60	80.1	34	54.2	95	2.11	100	0
1952	65.7	88	78.7	55	52.7	123	1.77	108	0
1951	62.3	135	72.6	138	52	128	2.50	91	0
1950	65.7	88	75.4	103	56.1	67	3.49	58	0
1949	60.4	143	72	140	48.8	143	1.62	113	0
1948	69.1	33	80.1	34	58	31	1.72	110	0
1947	68.2	46	79.2	48	57.2	48	2.49	92	0
1946	66.2	75	78.2	63	54.2	95	2.32	95	0
1945	65.4	96	74.5	122	56.4	63	7.36	11	0
1944	66.2	75	76.2	90	56.2	65	4.49	43	0
1943	62	137	72.8	137	51.1	135	0.88	135	0
1942	64.3	114	74	128	54.6	89	2.55	89	0
1941	69.7	29	81.1	24	58.3	26	4.87	37	0
1940	66.6	66	79.5	44	53.7	108	1.16	127	0
1939	71.8	6	85.4	2	58.1	30	0.85	136	0
1938	68.2	46	79.3	47	57	52	2.12	98	0
1937	65.8	84	78.5	57	53.2	114	1.14	128	0
1936	70.5	17	80.4	32	60.6	9	10.58	6	0
1935	65.8	84	77.3	74	54.3	94	3.33	61	0
1934	63.8	123	73.4	133	54.1	97	6.57	14	0
1933	72.6	4	85.1	3	60.2	11	5.92	18	0
1932	64.8	106	77.4	73	52.2	127	1.78	105	0
1931	73	3	83.9	5	62.2	4	4.92	33	0
1930	69.8	28	82	16	57.5	41	1.31	121	0
1929	65.3	100	75.9	98	54.6	89	1.04	130	0
1928	61.3	139	72.9	136	49.6	141	3.18	65	0
1927	70	23	79.9	38	60.1	12	5.82	20	0
1926	65.6	92	73.6	130	57.5	41	11.55	4	0
1925	71.7	9	81.7	19	61.6	6	4.99	31	0
1924	60.5	142	70.8	142	50.1	140	3.74	49	0
1923	65.4	96	75.3	104	55.4	77	5.28	25	0
1922	69.6	32	82.2	15	57	52	2.71	83	0
1921	70.1	21	80.6	28	59.5	20	4.86	38	0
1920	68.5	42	80.3	33	56.7	57	1.84	104	0
1919	68.3	43	79.9	38	56.6	60	3.48	59	0
1918	58.2	144	69.4	144	47.1	144	1.67	111	0
1917	63.7	125	74.7	118	52.7	123	3.14	67	0
1916	63.5	128	75.3	104	51.8	132	3.73	50	0
1915	67.8	55	77.7	71	58	31	4.88	36	0
1914	66.2	75	77.3	74	55.1	82	5.55	24	0
1913	66.9	62	78.4	60	55.3	80	2.58	88	0
1912	67	61	77.8	69	56.2	65	3.54	55	0
1911	67.9	52	78.1	66	57.6	37	12.30	3	0
1910	65.4	96	76.7	83	54	100	3.12	69	0
1909	64	119	75.2	108	52.8	121	3.68	51	0
1908	69.1	33	83.1	10	55.1	82	0.82	137	0
1907	64.4	111	74.9	115	53.8	107	2.94	74	0
1906	69.7	29	81.8	18	57.6	37	4.92	33	0
1905	67.6	57	78.3	62	56.8	56	1.78	105	0
1904	68.3	43	79.5	44	57.1	50	6.67	13	0
1903	66.3	72	78.2	63	54.4	93	5.78	22	1
1902	63.9	121	73.6	130	53.6	109	6.84	12	2
1901	66.5	69	78.2	63	54.8	87	2.64	84	0
1900	69	35	79.2	48	58.7	23	2.94	74	0
1899	65.6	92	77.2	77	54	100	5.24	27	0
1898	70	23	79.9	38	60	14	6.05	17	0
1897	71.8	6	86.4	1	57.3	46	0.93	133	0
1896	64.5	110	74.9	115	54.1	97	4.86	38	0
1895	71.1	14	81.5	21	60.7	8	4.92	33	0
1894	68.7	40	77.7	71	59.6	19	4.42	44	0
1893	68.8	39	79.9	38	57.6	37	3.02	73	0
1892	66.2	75	77.8	69	54.7	88	2.35	94	0
1891	71.2	12	83.4	7	59	21	2.00	102	0
1890	65	104	75.2	108	54.9	85	2.12	98	0
1889	65.8	84	76	97	55.5	76	2.61	87	0
1888	62.9	131	74.6	121	51.2	134	4.79	41	0
1887	68	50	78.5	57	57.5	41	2.53	90	0
1886	69.9	27	79.4	46	60.5	10	4.68	42	0
1885	66.8	65	75.7	99	57.8	34	5.28	25	0
1884	73.4	2	83.1	10	63.7	1	5.76	23	0
1883	63.7	125	75.3	104	52.3	126	2.93	76	3

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
2015	73.5
1884	73.4
1931	73
1933	72.6
2019	72.3
2026	71.8
1939	71.8
1897	71.8
1925	71.7
2005	71.6

Coldest
Year	Mean, °F
1918	58.2
1949	60.4
1924	60.5
1975	60.9
1974	61.1
1928	61.3
1993	61.4
1943	62
1989	62.2
1951	62.3

Wettest
Year	Precipitation, in
1961	13.09
2008	12.34
1911	12.30
1926	11.55
1970	11.49
1936	10.58
1965	8.17
2019	7.68
1973	7.58
1993	7.56

Driest
Year	Precipitation, in
1979	0.03
2025	0.09
1956	0.41
2017	0.54
2024	0.72
2002	0.78
2022	0.79
1908	0.82
1939	0.85
1943	0.88

The hottest, coldest and wettest days

Hottest day: 96°F; 4 September 2026, 3 September 2026
Coldest night: 49°F; 28 September 2026
Wettest day: 1.25 in; 16 September 2026

Every month, season and year

Months

Seasons

Years

Peoria, IL the day's answers

All-time records

Every answer in words

September 2026 brought 3.09 in of precipitation in Peoria, IL, the wettest September since 2020, 70th wettest of 144.
The hottest day of September 2026 in Peoria, IL: 96°F on Friday 4 September 2026 and Thursday 3 September 2026.
The coldest night of September 2026 in Peoria, IL: a low of 49°F on Monday 28 September 2026.
The wettest day of September 2026 in Peoria, IL: 1.25 in on Wednesday 16 September 2026.