National Weather Service United States Department of Commerce

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

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