Number of Days of 90 °F in Boise by Year

This page contains a list of the number of days in each year that the high temperature equaled or exceeded 90 degrees Fahrenheit in Boise, Idaho, between 1911 and 2024.
Also see:
Which year had the most 90° days?
Based on NOAA records, the year 1930 holds the record for the most 90 °F days in Boise history. There were 83 days with a high temperature of at least 90 degrees that year.
How many so far this year (2024)?
It has not reached 90 degrees Fahrenheit in Boise so far in 2024. As of March 27, the highest temperature this year is 72 °F.
The last time it reached at least 90° F was September 16, 2023.
  • Years marked with a gold background have more than 5% incomplete data
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Year Rank Days >= 90 °F
2024 114 0
2023 17 62
2022 4 71
2021 4 71
2020 29 57
2019 62 47
2018 37 55
2017 6 70
2016 32 56
2015 32 56
2014 52 50
2013 3 73
2012 9 68
2011 17 62
2010 66 46
2009 20 61
2008 22 60
2007 12 65
2006 13 64
2005 48 51
2004 62 47
2003 16 63
2002 76 44
2001 13 64
2000 46 52
1999 71 45
1998 25 58
1997 86 39
1996 60 48
1995 71 45
1994 11 66
1993 113 24
1992 41 54
1991 32 56
1990 25 58
1989 80 41
1988 24 59
1987 71 45
1986 25 58
1985 76 44
1984 86 39
1983 86 39
1982 95 36
1981 37 55
1980 110 27
1979 80 41
1978 103 32
1977 55 49
1976 100 34
1975 79 43
1974 41 54
1973 55 49
1972 80 41
1971 52 50
1970 25 58
1969 86 39
1968 71 45
1967 7 69
1966 45 53
1965 109 29
1964 86 39
1963 48 51
1962 107 31
1961 13 64
1960 55 49
1959 66 46
1958 48 51
1957 100 34
1956 95 36
1955 46 52
1954 71 45
1953 92 37
1952 91 38
1951 99 35
1950 80 41
1949 95 36
1948 110 27
1947 62 47
1946 85 40
1945 66 46
1944 100 34
1943 103 32
1942 66 46
1941 107 31
1940 29 57
1939 41 54
1938 62 47
1937 41 54
1936 32 56
1935 52 50
1934 10 67
1933 95 36
1932 76 44
1931 2 81
1930 1 83
1929 7 69
1928 48 51
1927 103 32
1926 20 61
1925 37 55
1924 32 56
1923 55 49
1922 29 57
1921 55 49
1920 66 46
1919 17 62
1918 37 55
1917 22 60
1916 103 32
1915 80 41
1914 60 48
1913 92 37
1912 110 27
1911 92 37
Weather Station Details
Years Station Coordinates
1940–2024 location
1911–1939 Meridian 1 W location