Carbondale, IL: Summer

31 August 2026: Summer 2026 averaged 77.4°F in Carbondale, IL, the warmest summer since 2025, tied 36th warmest of 118 (with 2018 and 1935).

Summer 2026

Mean temperature: 77.4°F; Warmest since 2025; 36th warmest of 118
Precipitation: 13.86 in; Wettest since 2020; 31st wettest of 120

A normal summer in Carbondale, IL (1991 to 2020): a mean temperature of 76.2°F, between 74.6°F and 78.5°F in eight years of ten and 10.49 in of precipitation, between 7.10 in and 16.40 in in eight years of ten.

The mean temperature of every summer in Carbondale, IL since 1900: 77.4°F in 2026; the highest is 82.1°F, in 1936.

Normal range, 74.6 to 78.5°F

Every year, ranked, as a table

Every summer in Carbondale, IL from 1899 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	77.4	36	87.7	67	67.1	12	13.86	31	0
2025	77.7	30	87.5	72	67.9	7	8.32	89	0
2024	76.8	50	87.4	75	66.1	28	9.19	77	0
2023	76.8	50	87.7	67	65.9	34	9.05	81	0
2022	77.2	44	88.6	50	65.8	35	5.23	113	0
2021	76.8	50	87	82	66.5	18	8.91	82	1
2020	77.3	39	87.5	72	67	13	13.94	30	0
2019	76.2	73	86.2	93	66.2	26	14.05	27	0
2018	77.4	36	87.3	78	67.6	9	10.46	62	1
2017	75.2	93	86	96	64.4	70	8.16	91	0
2016	78.1	26	87.4	75	68.8	3	18.36	9	0
2015	76.2	73	85.5	102	66.9	16	17.87	10	0
2014	75.2	93	85.4	103	65.1	53	9.84	66	0
2013	74.4	107	84.8	113	64	84	10.51	61	0
2012	78.5	22	92.8	9	64.3	73	8.89	83	0
2011	79.4	10	90	32	68.9	2	13.51	36	0
2010	80.4	4	91.4	21	69.4	1	7.39	99	0
2009	75.4	91	85.3	105	65.5	43	13.05	37	0
2008	76.1	76	86.8	85	65.4	45	11.91	48	0
2007	77.6	32	89.7	36	65.5	43	7.79	95	0
2006	76.7	55	87.7	67	65.6	41	11.93	47	0
2005	77.3	39	88.1	60	66.6	17	7.11	102	0
2004	74.8	102	84.9	111	64.7	64	9.26	76	1
2003	75	100	86.1	95	63.9	87	9.27	75	2
2002	78.6	18	90.1	31	67	13	1.55	120	3
2001	75.5	88	85.9	98	65.1	53	16.24	16	2
2000	75.1	96	85.2	107	65.1	53	18.54	8	1
1999	76	79	87.7	67	64.3	73	7.03	104	2
1998	76.5	62	86	96	67	13	13.65	34	0
1997	74.6	105	84.2	116	64.9	58	10.92	58	0
1996	75.1	96	85.8	100	64.3	73	9.54	70	1
1995	76.2	73	87.1	80	65.4	45	9.38	73	2
1994	74.3	109	84.9	111	63.7	94	11.85	50	0
1993	76.6	58	86.6	88	66.5	18	13.70	33	0
1992	73	115	83.7	117	62.2	112	7.85	94	1
1991	76.9	49	89.9	33	63.8	89	5.09	114	0
1990	75.5	88	86.5	89	64.4	70	11.34	52	1
1989	74.8	102	86.2	93	63.2	101	11.17	54	6
1988	77.3	39	90.9	23	63.8	89	6.32	111	4
1987	76.4	64	89.1	43	63.7	94	13.97	29	1
1985	72.4	117	85	108	59.8	120	22.76	3	1
1984	75.2	93	88.4	56	62	115	9.33	74	1
1983	77.1	46	90.5	26	63.7	94	7.88	93	1
1982	73.6	114	85.3	105	61.8	116	9.59	69	0
1981	75.6	87	86.4	90	64.9	58	15.78	18	1
1980	78.6	18	91.7	18	65.6	41	9.60	68	0
1979	74.4	107	84.6	115	64.4	70	16.69	13	1
1978	76.1	76	88.3	57	64	84	12.20	45	0
1977	76.8	50	88	63	65.7	39	13.55	35	1
1976	72.9	116	84.8	113	61.1	119	15.07	23	0
1975	75	100	86.3	92	63.8	89	16.14	17	0
1974	74.2	111	85.8	100	62.6	108	10.36	63	0
1973					65.3	48	11.60	51	11
1972	74.7	104	87.3	78	62.1	114	15.03	24	1
1971	76.6	58	87.5	72	65.7	39	12.59	43	0
1970	75.9	82	86.9	84	65	57	9.91	65	0
1969	77.3	39	88.8	46	65.8	35	16.36	15	0
1968	77.5	35	88.8	46	66.1	28	8.33	88	0
1967					62.5	109	11.89	49	12
1966	76.8	50	89.5	39	64.1	79	6.75	108	1
1965	76.3	68	88.5	55	64.1	79	12.51	44	1
1964	77.1	46	89.4	41	64.8	61	9.14	78	0
1963	76.3	68	88.6	50	64.1	79	8.34	87	0
1962	76.4	64	88.9	44	63.9	87	7.79	95	0
1961	75.1	96	87	82	63.2	101	14.02	28	0
1960	75.9	82	88.3	57	63.5	99	9.08	79	0
1959	76.1	76	88.1	60	64.2	78	12.69	42	0
1958	75.5	88	86.4	90	64.7	64	22.64	4	1
1957	76.4	64	88.6	50	64.3	73	7.64	97	0
1956	76.4	64	88.2	59	64.5	69	12.72	41	1
1955	76.3	68	88.7	48	63.8	89	7.13	101	7
1954	79.5	8	92.4	13	66.4	24	11.17	54	3
1953	78.4	23	92.7	11	64.1	79	5.83	112	0
1952	79.5	8	93.1	8	65.8	35	7.07	103	0
1951	76.3	68	87.9	65	64.7	64	16.73	12	0
1950	73.8	112	85	108	62.5	109	15.13	22	0
1949	77.2	44	87.9	65	66.5	18	10.30	64	0
1948	75.1	96	87.6	71	62.8	107	11.02	57	9
1947	76.7	55	88.1	60	65.3	48	8.27	90	1
1946	76.3	68	87.4	75	65.2	51	13.00	38	0
1945	74.5	106	85	108	64	84	21.56	5	0
1944	78.4	23	90.2	29	66.5	18	7.64	97	0
1943	79.3	13	90.2	29	68.4	5	9.84	66	0
1942	76.7	55	86.8	85	66.5	18	10.83	59	0
1941	80	6	92	14	68	6	4.56	116	0
1940	76.5	62	90.8	24	62.2	112	6.91	106	0
1939	77.1	46	89.9	33	64.3	73	9.51	71	0
1938	78.1	26	90.3	28	66	32	15.20	20	0
1937	77.6	32	89.9	33	65.3	48	13.78	32	0
1936	82.1	1	96.8	1	67.4	11	4.80	115	0
1935	77.4	36	88.7	48	66.1	28	20.31	6	0
1934	81	3	93.3	7	68.6	4	9.51	71	0
1933	77.7	30	90.5	26	64.9	58	6.66	109	0
1932	79	15	91.8	16	66.2	26	17.67	11	0
1931	78.6	18	91.4	21	65.8	35	8.61	85	0
1930	78.8	17	93.9	5	63.8	89	3.95	119	0
1929	75.7	85	88.6	50	62.9	106	15.22	19	0
1928	76	79	87.1	80	64.8	61	24.30	1	0
1927	73.7	113	85.9	98	61.4	118	11.24	53	0
1926	77.9	29	91.6	19	64.1	79	6.99	105	0
1925	78.6	18	92.6	12	64.6	67	10.81	60	0
1924	76.6	58	89.5	39	63.7	94	14.57	25	0
1923	77.6	32	90.7	25	64.6	67	9.06	80	0
1922	77.3	39	91.5	20	63.2	101	6.50	110	0
1921	79.4	10	92.8	9	66.1	28	15.15	21	1
1920	75.3	92	88.6	50	61.8	116	11.16	56	1
1919	78.9	16	91.8	16	66	32	8.61	85	0
1918	79.4	10	93.4	6	65.4	45	6.81	107	0
1917	75.8	84	86.8	85	64.8	61	12.87	39	1
1916	78	28	89.6	37	66.5	18	16.62	14	0
1915	74.3	109	85.4	103	63	105	23.29	2	3
1914	81.4	2	95.1	3	67.7	8	4.27	117	1
1913	79.6	7	94	4	65.1	53	7.34	100	0
1912	75.7	85	88	63	63.4	100	12.01	46	0
1911	79.2	14	91.9	15	66.4	24	12.85	40	2
1910	76	79	88.9	44	63.1	104	19.27	7	0
1904	69.2	118	83	118	55.3	121			8
1903					62.4	111	8.00	92	17
1902	76.6	58	89.6	37	63.6	98	8.82	84	0
1901	80.4	4	95.5	2	65.2	51	4.18	118	6
1900	78.4	23	89.2	42	67.6	9	14.38	26	3
1899									33

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1936	82.1
1914	81.4
1934	81
2010	80.4
1901	80.4
1941	80
1913	79.6
1954	79.5
1952	79.5
2011	79.4
More years share the last value

Coldest
Year	Mean, °F
1904	69.2
1985	72.4
1976	72.9
1992	73
1982	73.6
1927	73.7
1950	73.8
1974	74.2
1994	74.3
1915	74.3

Wettest
Year	Precipitation, in
1928	24.30
1915	23.29
1985	22.76
1958	22.64
1945	21.56
1935	20.31
1910	19.27
2000	18.54
2016	18.36
2015	17.87

Driest
Year	Precipitation, in
2002	1.55
1930	3.95
1901	4.18
1914	4.27
1941	4.56
1936	4.80
1991	5.09
2022	5.23
1953	5.83
1988	6.32

The hottest, coldest and wettest days

Hottest day: 97°F; 31 August 2026
Coldest night: 51°F; 3 June 2026
Wettest day: 3.05 in; 10 July 2026

Every month, season and year

Months

Seasons

Years

Carbondale, IL the day's answers

All-time records

Every answer in words

Summer 2026 brought 13.86 in of precipitation in Carbondale, IL, the wettest summer since 2020, 31st wettest of 120.
The hottest day of summer 2026 in Carbondale, IL: 97°F on Monday 31 August 2026.
The coldest night of summer 2026 in Carbondale, IL: a low of 51°F on Wednesday 3 June 2026.
The wettest day of summer 2026 in Carbondale, IL: 3.05 in on Friday 10 July 2026.