Indianapolis, IN: Summer

31 August 2026: Summer 2026 averaged 75.3°F in Indianapolis, IN, the warmest summer since 2025, tied 37th warmest of 156 (with 1953, 1942, 1899 and 3 other years).

Summer 2026

Mean temperature: 75.3°F; Warmest since 2025; 37th warmest of 156
Precipitation: 13.86 in; Wettest since 2021; 38th wettest of 156

A normal summer in Indianapolis, IN (1991 to 2020): a mean temperature of 74.1°F, between 72.2°F and 76.6°F in eight years of ten and 12.80 in of precipitation, between 7.00 in and 17.30 in in eight years of ten.

The mean temperature of every summer in Indianapolis, IN since 1871: 75.3°F in 2026; the highest is 78.6°F, in 1874.

Normal range, 72.2 to 76.6°F

Every year, ranked, as a table

Every summer in Indianapolis, IN from 1871 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
2026	75.3	37	84.1	70	66.5	18	13.86	38
2025	76.2	19	85.1	43	67.2	11	9.83	103
2024	74.9	53	84.6	56	65.3	43	10.72	88
2023	74	79	83.6	83	64.4	64	10.44	92
2022	75.8	29	85.5	33	66.1	25	8.72	118
2021	75.5	31	84.5	59	66.6	17	15.84	21
2020	75.4	33	85.2	39	65.6	37	11.43	71
2019	74.7	60	83.9	74	65.5	40	14.91	32
2018	76.1	23	85.3	37	67	13	11.27	75
2017	73.8	85	83.5	85	64.1	81	14.48	34
2016	76.4	15	85.2	39	67.6	8	17.51	7
2015	73.4	97	82.5	113	64.2	73	23.05	2
2014	72.2	126	81.1	141	63.3	107	13.09	50
2013	73.6	91	82.8	104	64.4	64	8.10	125
2012	77.8	5	89.4	2	66.3	20	7.43	133
2011	77.6	6	87.4	7	67.8	7	7.34	135
2010	78.1	4	87.6	6	68.6	5	12.97	52
2009	72.4	120	81.2	139	63.7	93	16.14	19
2008	74	79	83.3	89	64.6	62	16.41	15
2007	76.2	19	86.4	19	65.9	32	7.55	131
2006	74.1	77	83	99	65.2	47	12.62	57
2005	75.9	27	85.2	39	66.7	16	10.77	87
2004	71.3	146	80.4	151	62.1	135	16.89	12
2003	72.4	120	81.8	127	63	113	15.01	29
2002	76.5	13	86.2	26	66.8	15	6.18	146
2001	73.3	100	82.9	101	63.8	90	15.27	26
2000	72.6	112	81.8	127	63.4	104	11.76	69
1999	75.1	48	85	46	65.2	47	7.03	136
1998	73.9	83	83	99	64.9	53	17.89	6
1997	72.2	126	81.6	131	62.8	121	6.68	139
1996	73.4	97	82.8	104	64	84	13.69	40
1995	76.4	15	86.7	15	66.1	25	10.26	95
1994	74	79	84.5	59	63.6	95	10.86	85
1993	74.5	65	84.2	67	64.9	53	16.51	14
1992	70.3	154	80.1	153	60.6	150	17.28	10
1991	75.5	31	86.5	17	64.5	63	6.62	140
1990	72.6	112	83.1	94	62	137	11.25	76
1989	73	105	82.4	115	63.6	95	18.00	5
1988	76.4	15	88.9	3	63.9	86	6.53	141
1987	74.3	70	84.8	47	63.9	86	14.19	35
1986	73.5	94	83.7	80	63.2	109	9.64	107
1985	72	134	81.9	124	62.2	134	12.41	60
1984	73.9	83	84.5	59	63.4	104	9.61	109
1983	77.3	7	88.3	4	66.3	20	8.90	115
1982	71.9	137	81.9	124	61.9	140	9.60	110
1981	73.8	85	83.3	89	64.3	69	9.08	114
1980	74.8	58	85.5	33	64.2	73	15.36	24
1979	72.1	133	82	122	62.3	131	21.08	3
1978	75.4	33	85.1	43	65.6	37	16.36	16
1977	74.4	68	84.6	56	64.2	73	10.90	84
1976	72.2	126	83.2	92	61.1	149	15.01	29
1975	73.7	89	83.4	87	64	84	15.04	28
1974	72.2	126	82	122	62.3	131	11.98	63
1973	74.6	61	84.8	47	64.3	69	15.32	25
1972	72.2	126	82.4	115	62	137	10.99	83
1971	73	105	83.1	94	62.9	117	11.00	82
1970	73.6	91	83.9	74	63.4	104	8.22	123
1969	72.8	110	83.2	92	62.4	128	15.16	27
1968	74	79	83.9	74	64.2	73	9.15	113
1967	72.9	108	83.4	87	62.4	128	5.79	149
1966	74.9	53	87	8	62.9	117	5.30	154
1965	71.9	137	82.4	115	61.4	145	9.92	99
1964	73.5	94	84.3	66	62.6	125	7.50	132
1963	71.1	149	82.4	115	59.9	155	12.18	61
1962	72.9	108	83.5	85	62.4	128	14.10	36
1961	70.9	150	81.3	137	60.6	150	8.78	116
1960	71.4	144	81.6	131	61.2	147	12.42	59
1959	75.2	44	85.4	35	65	51	7.83	128
1958	70.8	152	80.3	152	61.2	147	17.32	8
1957	73.6	91	83.7	80	63.6	95	16.71	13
1956	72.7	111	82.5	113	62.8	121	9.96	98
1955	74.2	74	84.8	47	63.6	95	8.24	122
1954	75.6	30	86.9	11	64.3	69	6.28	144
1953	75.3	37	87	8	63.6	95	12.81	53
1952	75.4	33	86.8	14	63.9	86	11.08	80
1951	72	134	82.6	108	61.4	145	11.32	74
1950	70.4	153	81.3	137	59.4	156	12.78	55
1949	75.2	44	85.2	39	65.1	50	13.77	39
1948	73.2	101	84.7	53	61.6	142	8.40	121
1947	72.6	112	82.7	107	62.5	127	13.22	47
1946	71.4	144	82.4	115	60.4	154	6.47	142
1945	70.9	150	81.2	139	60.6	150	14.98	31
1944	74.6	61	86.4	19	62.8	121	6.29	143
1943	75.1	48	85.8	30	64.4	64	8.73	117
1942	75.3	37	84.7	53	66	29	13.54	41
1941	76.1	23	86.3	22	66	29	9.64	107
1940	76.2	19	86.3	22	66.1	25	5.69	152
1939	75.2	44	84.4	62	66	29	15.78	22
1938	74.8	58	83.9	74	65.8	34	16.17	18
1937	74.6	61	84.2	67	65	51	12.52	58
1936	78.5	2	89.7	1	67.3	10	6.07	148
1935	74.3	70	83.1	94	65.5	40	12.81	53
1934	78.2	3	88.3	4	68	6	7.97	126
1933	76.6	12	86.9	11	66.2	24	10.32	94
1932	75.4	33	85.1	43	65.8	34	11.97	64
1931	76.5	13	85.9	28	67.1	12	9.85	102
1930	75	52	85.4	35	64.7	59	4.53	155
1929	72.5	119	81.7	129	63.3	107	13.29	45
1928	71.9	137	80.9	144	63	113	15.70	23
1927	69.9	156	79.1	155	60.6	150	7.36	134
1926	73.5	94	82.8	104	64.2	73	10.03	97
1925	74.5	65	84.1	70	64.9	53	13.19	48
1924	72.3	122	81.4	135	63.1	111	10.56	91
1923	74.1	77	83.3	89	64.9	53	9.56	111
1922	74.3	70	83.8	78	64.7	59	6.11	147
1921	76.8	11	86.1	27	67.4	9	11.90	65
1920	72.2	126	81.4	135	63	113	10.14	96
1919	75.9	27	85.6	32	66.1	25	7.73	130
1918	74.2	74	83.6	83	64.7	59	7.79	129
1917	71.8	140	81	142	62.6	125	9.92	99
1916	74.9	53	84.6	56	65.2	47	10.83	86
1915	70	155	78.6	156	61.5	144	16.10	20
1914	76	26	86.3	22	65.8	34	9.72	105
1913	76.1	23	86.4	19	65.9	32	11.21	78
1912	71.8	140	80.6	148	63	113	11.89	66
1911	74.9	53	84.8	47	64.9	53	5.71	150
1910	72.6	112	81.9	124	63.2	109	13.52	42
1909	73.1	104	82.4	115	63.8	90	13.44	43
1908	73.8	85	83.8	78	63.7	93	5.34	153
1907	72	134	81	142	62.9	117	11.42	72
1906	73.7	89	82.9	101	64.4	64	12.14	62
1905	73.2	101	82.1	121	64.3	69	8.67	119
1904	71.3	146	80.6	148	62	137	8.61	120
1903	71.5	143	80.8	146	62.3	131	9.65	106
1902	72.3	122	81.6	131	63.1	111	13.28	46
1901	76.9	10	86.9	11	66.9	14	7.92	127
1900	75.2	44	84.2	67	66.3	20	11.84	67
1899	75.3	37	85.3	37	65.4	42	11.22	77
1898	75.1	48	84.8	47	65.3	43	9.92	99
1897	73.2	101	82.9	101	63.5	102	9.82	104
1896	74.3	70	84.4	62	64.2	73	12.72	56
1895	75.3	37	86.6	16	64.1	81	6.27	145
1894	75.3	37	87	8	63.5	102	6.77	138
1893	75.1	48	86.3	22	63.9	86	4.46	156
1892	74.9	53	84.4	62	65.3	43	8.16	124
1891	72.6	112	82.6	108	62.7	124	10.62	89
1890	74.5	65	84.8	47	64.1	81	10.42	93
1889	71.2	148	80.7	147	61.6	142	11.40	73
1888	73.8	85	84	72	63.6	95	11.82	68
1887	75.3	37	86.5	17	64.2	73	7.01	137
1886	72.6	112	83.1	94	62.1	135	13.89	37
1885	72.2	126	82.6	108	61.9	140	12.99	51
1884	73	105	81.7	129	64.4	64	10.60	90
1883	71.8	140	80.6	148	62.9	117	13.19	48
1882	72.3	122	80.9	144	63.6	95	17.29	9
1881	76.2	19	85.8	30	66.5	18	5.71	150
1880	74.6	61	83.7	80	65.6	37	13.41	44
1879	73.4	97	82.6	108	64.2	73	11.05	81
1878	74.2	74	83.1	94	65.3	43	9.21	112
1877	72.6	112	81.5	134	63.8	90	14.53	33
1876	74.4	68	82.6	108	66.3	20	20.88	4
1875	72.3	122	79.6	154	64.9	53	28.99	1
1874	78.6	1	85.9	28	71.4	1	11.68	70
1873	77.2	9	84.7	53	69.8	3	16.30	17
1872	77.3	7	84.4	62	70.1	2	16.97	11
1871	76.4	15	84	72	68.8	4	11.20	79

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1874	78.6
1936	78.5
1934	78.2
2010	78.1
2012	77.8
2011	77.6
1983	77.3
1872	77.3
1873	77.2
1901	76.9

Coldest
Year	Mean, °F
1927	69.9
1915	70
1992	70.3
1950	70.4
1958	70.8
1961	70.9
1945	70.9
1963	71.1
1889	71.2
2004	71.3
More years share the last value

Wettest
Year	Precipitation, in
1875	28.99
2015	23.05
1979	21.08
1876	20.88
1989	18.00
1998	17.89
2016	17.51
1958	17.32
1882	17.29
1992	17.28

Driest
Year	Precipitation, in
1893	4.46
1930	4.53
1966	5.30
1908	5.34
1940	5.69
1911	5.71
1881	5.71
1967	5.79
1936	6.07
1922	6.11

The hottest, coldest and wettest days

Hottest day: 93°F; 18 July 2026, 17 July 2026, 16 July 2026, 3 July 2026, 2 July 2026
Coldest night: 55°F; 24 June 2026, 17 June 2026, 16 June 2026, 15 June 2026
Wettest day: 2.09 in; 1 August 2026

Every month, season and year

Months

Seasons

Years

Indianapolis, IN the day's answers

All-time records

Every answer in words

Summer 2026 brought 13.86 in of precipitation in Indianapolis, IN, the wettest summer since 2021, 38th wettest of 156.
The hottest day of summer 2026 in Indianapolis, IN: 93°F on Saturday 18 July 2026, Friday 17 July 2026, Thursday 16 July 2026 and 2 other days.
The coldest night of summer 2026 in Indianapolis, IN: a low of 55°F on Wednesday 24 June 2026, Wednesday 17 June 2026, Tuesday 16 June 2026 and 1 other day.
The wettest day of summer 2026 in Indianapolis, IN: 2.09 in on Saturday 1 August 2026.