Boise - Highest Temperature for Each Year





Here's where you'll find answers to questions about the highest temperatures and hottest days in Boise, Idaho. How hot did it get in 2018? When was the last year thermometers in Boise never reached 100 °F? What was the highest temperature in Boise a century ago? Answers to those questions and much more can be found quickly and easily in the list below of record high temperatures.

This page gives the highest temperature for each year in Boise and the date that it happened. A date with a plus sign means it was that hot on at least one other day earlier that year.

These records go back to 1911, with a few years missing data. The highest temperature measured during that time was 111 degrees Fahrenheit (44 Celsius) on July 19, 1960 and July 20, 1931.

Since 1940 the temperature extremes were observed at Boise Airport. Before then, the weather station was on the outskirts of Boise.

Highest Boise temperatures in recent years
Max °F Date Max °C
110 August 10, 2018 43
104 July 08, 2017 40
102 June 29, 2016 39
110 June 28, 2015 43
104 July 13, 2014 40
110 July 01, 2013 43
108 July 12, 2012 + 42
103 July 24, 2011 39
104 August 26, 2010 40
Highest temperature recorded at Boise each year
Max °F Date Max °C
106 July 18, 2009 41
105 June 29, 2008 41
105 July 14, 2007 + 41
107 July 22, 2006 42
107 July 21, 2005 42
104 July 17, 2004 40
108 July 22, 2003 42
110 July 13, 2002 43
106 July 03, 2001 41
102 August 09, 2000 + 39
102 July 27, 1999 39
108 July 17, 1998 42
101 August 07, 1997 + 38
104 August 26, 1996 + 40
102 July 28, 1995 39
106 July 22, 1994 41
102 July 28, 1993 39
106 July 31, 1992 41
103 July 12, 1991 39
109 August 06, 1990 43
108 July 07, 1989 42
104 June 22, 1988 40
104 July 26, 1987 40
105 August 10, 1986 41
101 July 09, 1985 + 38
104 July 25, 1984 40
106 August 07, 1983 41
98 July 30, 1982 37
102 July 04, 1981 39
106 July 22, 1980 41
102 July 17, 1979 39
105 July 26, 1978 41
102 August 01, 1977 39
103 July 16, 1976 39
108 July 27, 1975 42
105 June 17, 1974 + 41
103 July 10, 1973 + 39
102 August 11, 1972 39
104 August 01, 1971 40
102 August 06, 1970 + 39
107 August 23, 1969 42
104 July 27, 1968 40
107 July 12, 1967 42
103 August 02, 1966 39
103 August 07, 1965 39
101 August 17, 1964 + 38
104 August 13, 1963 40
102 June 25, 1962 39
110 August 04, 1961 43
111 July 19, 1960 44
106 July 23, 1959 41
100 July 28, 1958 38
100 July 25, 1957 38
106 July 09, 1956 41
105 August 30, 1955 41
100 July 04, 1954 38
105 July 12, 1953 41
98 June 09, 1952 37
103 July 31, 1951 + 39
103 June 30, 1950 39
105 August 03, 1949 41
99 July 22, 1948 37
104 July 14, 1947 40
105 August 19, 1946 41
102 September 01, 1945 + 39
99 August 05, 1944 37
102 July 25, 1943 39
104 July 21, 1942 + 40
101 July 17, 1941 38
109 June 19, 1940 43
110 July 27, 1939 43
103 July 22, 1938 39
104 July 04, 1937 40
104 July 21, 1936 + 40
107 August 09, 1935 42
110 July 28, 1934 + 43
110 July 24, 1933 43
106 August 07, 1932 41
111 July 20, 1931 44
107 July 14, 1930 42
1929
108 July 25, 1928 42
102 July 26, 1927 39
108 August 24, 1926 42
108 July 16, 1925 42
1924
101 July 27, 1923 38
104 August 26, 1922 40
101 July 19, 1921 38
1920
107 July 16, 1919 42
104 July 29, 1918 40
105 July 26, 1917 41
101 July 12, 1916 38
1915
102 August 14, 1914 39
100 August 24, 1913 38
98 July 17, 1912 + 37
101 July 17, 1911 + 38
Reference

Jay Lawrimore. 2016. Global Summary of the Year, Version 1.0. NOAA National Centers for Environmental Information. 

Boise - Extremes
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