Extreme Heat in the Central US Expands to the Southeast; Severe Weather & Flash Flooding Threats in the Plains & Upper Midwest Tonight.

Dangerous heat continues across portions of the Central and Southeast U.S. through July. Heavy rains, flooding, & severe weather are possible across the Plains & Upper Midwest to the upper Great Lakes tonight, with the heavy rain and flooding threat continuing through Friday. Tropical Depression 12W brings heavy rain to Guam & the Marianas through Saturday. Read More >

Annual Heat Index Statistics
Highest Heat Index By Year
All HI Readings >=110
All HI Readings >=110 By Summer

Annual Heat Index Statistics

The table below depicts the number of days each year where the heat index reached or exceeded each given threshold.

Year	>90	>95	>100	>105	>110
1973	76	54	26	11	5
1974	62	46	27	14	3
1975	73	55	29	11	5
1976	44	28	13	3	0
1977	81	56	30	15	6
1978	84	51	30	10	1
1979	58	40	24	12	0
1980	75	62	42	25	15
1981	55	32	16	12	4
1982	56	34	19	11	4
1983	82	63	39	22	8
1984	66	45	24	11	2
1985	60	42	21	9	4
1986	74	51	31	15	3
1987	83	58	30	12	7
1988	68	49	33	20	10
1989	58	41	24	13	2
1990	61	44	33	18	3
1991	82	50	25	5	0
1992	43	29	14	3	1
1993	71	54	32	8	2
1994	42	23	9	1	0
1995	51	36	20	8	1
1996	64	36	14	4	1
1997	55	34	15	7	3
1998	89	58	27	15	5
1999	71	50	37	18	9
2000	58	39	17	10	0
2001	66	51	21	13	3
2002	79	46	20	7	0
2003	48	32	20	7	2
2004	49	29	12	7	1
2005	83	62	36	18	12
2006	59	43	23	9	0
2007	71	38	16	4	0
2008	49	28	11	5	0
2009	38	20	11	3	0
2010	91	65	44	27	8
2011	74	58	32	12	5
2012	81	50	30	16	1
2013	55	35	16	2	0
2014	55	31	17	7	1
2015	68	37	20	6	3
2016	83	57	32	4	1
2017	59	29	11	3	0
2018	98	56	23	4	0
2019	79	50	25	6	2
2020	70	41	21	2	0
2021	60	46	19	8	1
2022	76	53	35	24	10
2023	64	41	28	18	12
2024	74	44	28	16	10
Total:	3471	2302	1252	551	176
Avg per year	67	44	24	10	3
Most in 1 year	98 (2018)	65 (2010)	44 (2010)	27 (2010)	15 (1980)
Least in 1 year	38 (2009)	20 (2009)	9 (1994)	1 (1994)	0 (14 yrs, most recently in 2020)

Period of Record: January 1, 1973 - September 30, 2024

Highest Heat Index By Year

Year	Date	Heat Index
1973	7/1/1973 7/21/1973	116
1974	7/19/1974 7/21/1974	112
1975	9/2/1975	113
1976	7/12/1976 7/24/1976 7/26/1976	105
1977	7/13/1977 7/15/1977	114
1978	6/28/1978	110
1979	7/15/1979 8/5/1979 8/8/1979	108
1980	7/2/1980	123
1981	7/12/1981	118
1982	7/4/1982	119
1983	7/24/1983	116
1984	8/29/1984	116
1985	7/13/1985	117
1986	7/26/1986	113
1987	8/3/1987	119
1988	8/15/1988	119
1989	8/24/1989 8/28/1989	112
1990	7/4/1990	114
1991	7/22/1991	108
1992	8/9/1992	110
1993	8/17/1993	111
1994	6/22/1994	105
1995	8/19/1995	114
1996	7/19/1996	110
1997	7/27/1997	112
1998	8/25/1998	116
1999	7/29/1999	119
2000	8/9/2000 8/29/2000 8/30/2000	108
2001	7/7/2001	112
2002	7/21/2002	108
2003	8/22/2003	111
2004	7/13/2004	110
2005	8/2/2005	121
2006	7/20/2006	109
2007	8/9/2007 8/15/2007	109
2008	8/1/2008	107
2009	6/26/2009	107
2010	8/3/2010	120
2011	8/3/2011	119
2012	7/19/2012	110
2013	8/31/2013	107
2014	8/23/2014	110
2015	7/28/2015	112
2016	8/5/2016	110
2017	7/21/2017 7/26/2017	107
2018	7/5/2018 7/14/2018	107
2019	8/12/2019 8/20/2019	110
2020	7/15/2020 8/10/2020	107
2021	7/29/2021	113
2022	7/20/2022	123
2023	8/25/2023	120
2024	7/3/2024	115

Period of Record: January 1, 1973 - September 30, 2024

All Heat Index Readings of 110 or greater

Date	Heat Index
7/20/2022	123
7/2/1980	123
8/2/2005	121
7/14/1980	121
8/25/2023	120
8/3/2010	120
8/24/2023	119
6/30/2023	119
8/3/2011	119
7/29/1999	119
8/15/1988	119
8/3/1987	119
7/4/1982	119
8/19/1980	119
8/20/2023	118
7/22/2005	118
8/12/1999	118
8/2/1987	118
7/12/1981	118
8/21/2023	117
7/11/2011	117
7/24/1999	117
7/13/1985	117
8/22/2023	116
7/24/2022	116
7/24/2005	116
7/21/2005	116
7/30/1999	116
8/25/1998	116
7/14/1985	116
8/29/1984	116
7/24/1983	116
7/20/1982	116
7/10/1980	116
7/8/1980	116
7/6/1980	116
7/21/1973	116
7/1/1973	116
7/3/2024	115
8/13/2010	115
8/4/2010	115
8/20/2005	115
8/19/2005	115
8/5/1982	115
7/9/1980	115
6/28/1980	115
6/29/2024	114
7/4/2024	114
7/30/2024	114
7/22/2022	114
8/6/2011	114
7/12/2011	114
8/10/2010	114
8/19/1995	114
7/4/1990	114
8/16/1988	114
7/30/1985	114
7/20/1983	114
7/16/1980	114
7/15/1977	114
7/13/1977	114
6/25/2024	113
8/23/2023	113
7/28/2023	113
7/27/2023	113
6/29/2023	113
7/29/2021	113
8/14/2010	113
8/26/2005	113
8/18/2005	113
7/25/2005	113
7/26/1999	113
7/25/1999	113
8/17/1988	113
8/3/1988	113
8/9/1987	113
7/26/1986	113
7/22/1983	113
7/21/1983	113
7/12/1980	113
7/5/1977	113
9/2/1975	113
8/1/2024	112
6/25/2023	112
7/28/2015	112
7/10/2011	112
8/12/2010	112
8/9/2010	112
7/7/2001	112
7/23/1999	112
7/27/1997	112
8/28/1989	112
8/24/1989	112
8/18/1988	112
8/22/1987	112
7/28/1986	112
8/28/1983	112
8/24/1983	112
7/20/1981	112
7/31/1980	112
7/4/1980	112
7/21/1974	112
7/19/1974	112
7/20/1973	112
7/15/2024	111
7/29/2023	111
8/8/2022	111
7/5/2022	111
6/13/2022	111
7/29/2015	111
7/27/2015	111
8/11/2010	111
7/26/2005	111
7/23/2005	111
8/22/2003	111
7/21/1999	111
7/3/1999	111
8/17/1993	111
7/8/1990	111
6/13/1990	111
7/17/1988	111
8/16/1987	111
8/1/1987	111
7/25/1986	111
7/3/1982	111
7/15/1980	111
7/11/1980	111
9/4/1975	111
9/3/1975	111
8/12/1975	111
7/23/1975	111
6/16/1973	111
7/31/2024	110
8/6/2024	110
8/15/2024	110
7/23/2022	110
7/16/2022	110
7/7/2022	110
6/12/2022	110
8/20/2019	110
8/19/2019	110
8/5/2016	110
8/23/2014	110
7/19/2012	110
7/20/2005	110
7/13/2004	110
8/21/2003	110
7/9/2001	110
7/8/2001	110
7/21/1998	110
7/18/1998	110
7/7/1998	110
7/6/1998	110
7/28/1997	110
7/26/1997	110
7/19/1996	110
8/18/1993	110
8/9/1992	110
8/9/1988	110
7/16/1988	110
7/15/1988	110
7/14/1988	110
8/21/1987	110
7/12/1985	110
7/15/1984	110
8/5/1983	110
7/19/1983	110
7/11/1981	110
6/24/1981	110
8/1/1980	110
6/28/1978	110
7/14/1977	110
7/7/1977	110
7/6/1977	110
7/18/1974	110
7/23/1973	110

Period of Record: January 1, 1973 - September 30, 2024

All Heat Index Readings of 110 or greater by Year

Date	Heat Index
6/16/1973	111
7/1/1973	116
7/20/1973	112
7/21/1973	116
7/23/1973	110
7/18/1974	110
7/19/1974	112
7/21/1974	112
7/23/1975	111
8/12/1975	111
9/2/1975	113
9/3/1975	111
9/4/1975	111
7/5/1977	113
7/6/1977	110
7/7/1977	110
7/13/1977	114
7/14/1977	110
7/15/1977	114
6/28/1978	110
6/28/1980	115
7/2/1980	123
7/4/1980	112
7/6/1980	116
7/8/1980	116
7/9/1980	115
7/10/1980	116
7/11/1980	111
7/12/1980	113
7/14/1980	121
7/15/1980	111
7/16/1980	114
7/31/1980	112
8/1/1980	110
8/19/1980	119
6/24/1981	110
7/11/1981	110
7/12/1981	118
7/20/1981	112
7/3/1982	111
7/4/1982	119
7/20/1982	116
8/5/1982	115
7/19/1983	110
7/20/1983	114
7/21/1983	113
7/22/1983	113
7/24/1983	116
8/5/1983	110
8/24/1983	112
8/28/1983	112
7/15/1984	110
8/29/1984	116
7/12/1985	110
7/13/1985	117
7/14/1985	116
7/30/1985	114
7/25/1986	111
7/26/1986	113
7/28/1986	112
8/1/1987	111
8/2/1987	118
8/3/1987	119
8/9/1987	113
8/16/1987	111
8/21/1987	110
8/22/1987	112
7/14/1988	110
7/15/1988	110
7/16/1988	110
7/17/1988	111
8/3/1988	113
8/9/1988	110
8/15/1988	119
8/16/1988	114
8/17/1988	113
8/18/1988	112
8/24/1989	112
8/28/1989	112
6/13/1990	111
7/4/1990	114
7/8/1990	111
8/9/1992	110
8/17/1993	111
8/18/1993	110
8/19/1995	114
7/19/1996	110
7/26/1997	110
7/27/1997	112
7/28/1997	110
7/6/1998	110
7/7/1998	110
7/18/1998	110
7/21/1998	110
8/25/1998	116
7/3/1999	111
7/21/1999	111
7/23/1999	112
7/24/1999	117
7/25/1999	113
7/26/1999	113
7/29/1999	119
7/30/1999	116
8/12/1999	118
7/7/2001	112
7/8/2001	110
7/9/2001	110
8/21/2003	110
8/22/2003	111
7/13/2004	110
7/20/2005	110
7/21/2005	116
7/22/2005	118
7/23/2005	111
7/24/2005	116
7/25/2005	113
7/26/2005	111
8/2/2005	121
8/18/2005	113
8/19/2005	115
8/20/2005	115
8/26/2005	113
8/3/2010	120
8/4/2010	115
8/9/2010	112
8/10/2010	114
8/11/2010	111
8/12/2010	112
8/13/2010	115
8/14/2010	113
7/10/2011	112
7/11/2011	117
7/12/2011	114
8/3/2011	119
8/6/2011	114
7/19/2012	110
8/23/2014	110
7/27/2015	111
7/28/2015	112
7/29/2015	111
8/5/2016	110
8/12/2019	110
8/20/2019	110
7/29/2021	113
6/12/2022	110
6/13/2022	111
7/5/2022	111
7/7/2022	110
7/16/2022	110
7/20/2022	123
7/22/2022	114
7/23/2022	110
7/24/2022	116
8/8/2022	111
6/25/2023	112
6/29/2023	113
6/30/2023	119
7/27/2023	113
7/28/2023	113
7/29/2023	111
8/20/2023	118
8/21/2023	117
8/22/2023	116
8/23/2023	113
8/24/2023	119
8/25/2023	120
6/25/2024	113
6/29/2024	114
7/3/2024	115
7/4/2024	114
7/15/2024	111
7/30/2024	114
7/31/2024	110
8/1/2024	112
8/6/2024	110
8/15/2024	110

Period of Record: January 1, 1973 - September 30, 2024

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Extreme Heat in the Central US Expands to the Southeast; Severe Weather & Flash Flooding Threats in the Plains & Upper Midwest Tonight.

Heat Index Climatology for Cape Girardeau, MO