Boise July 21 Weather Records

Daily averages and all-time records for weather in Boise, Idaho for the date of July 21.
July 21 All-Time Records
1911–2024
Highest temperature 108 °F 1931
Lowest temperature 38 °F 1914
Lowest daily high 70 °F 1954
Highest daily low 73 °F 1977
Most precipitation 0.21 inches 1972
Most snow none -
July 21 Average Weather
1991–2020 1
Average high 93.5 °F
Average low 62.3 °F
Chance precipitation 7.4%
Chance snow 0%
Boise July 21 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 105 70 0.00 0.0
2022 100 64 0.00 0.0
2021 95 68 0.01 0.0
2020 99 63 0.00 0.0
2019 97 57 0.00 0.0
2018 97 59 0.00 0.0
2017 94 58 0.00 0.0
2016 100 64 0.00 0.0
2015 95 66 0.02 0.0
2014 83 71 0.00 0.0
2013 99 62 0.00 0.0
2012 96 61 0.00 0.0
2011 88 58 0.00 0.0
2010 95 60 0.00 0.0
2009 99 65 0.00 0.0
2008 95 71 0.00 0.0
2007 97 64 0.00 0.0
2006 104 68 0.00 0.0
2005 107 68 0.00 0.0
2004 93 61 0.00 0.0
2003 101 65 0.00 0.0
2002 95 62 0.00 0.0
2001 86 55 0.00 0.0
2000 102 67 0.00 0.0
1999 90 54 0.00 0.0
1998 100 63 0.00 0.0
1997 101 68 0.00 0.0
1996 90 56 0.00 0.0
1995 90 63 0.00 0.0
1994 101 68 0.00 0.0
1993 78 54 0.03 0.0
1992 84 53 0.00 0.0
1991 93 60 0.00 0.0
1990 95 64 0.00 0.0
1989 91 63 0.02 0.0
1988 103 59 0.00 0.0
1987 86 54 0.11 0.0
1986 92 52 0.00 0.0
1985 97 58 0.00 0.0
1984 84 53 0.00 0.0
1983 90 53 0.00 0.0
1982 94 58 0.00 0.0
1981 90 50 0.00 0.0
1980 96 58 0.00 0.0
1979 88 72 0.00 0.0
1978 87 53 0.00 0.0
1977 100 73 0.00 0.0
1976 89 56 0.00 0.0
1975 95 63 0.01 0.0
1974 98 63 0.00 0.0
1973 80 58 0.00 0.0
1972 73 53 0.21 0.0
1971 96 63 0.00 0.0
1970 90 67 0.00 0.0
1969 97 55 0.00 0.0
1968 93 54 0.00 0.0
1967 91 56 0.00 0.0
1966 88 50 0.00 0.0
1965 81 51 0.00 0.0
1964 93 59 0.00 0.0
1963 99 64 0.00 0.0
1962 98 60 0.00 0.0
1961 93 62 0.00 0.0
1960 102 65 0.00 0.0
1959 101 71 0.00 0.0
1958 93 63 0.00 0.0
1957 91 63 0.00 0.0
1956 95 68 0.00 0.0
1955 102 67 0.08 0.0
1954 70 46 0.00 0.0
1953 86 47 0.00 0.0
1952 80 53 0.00 0.0
1951 84 54 0.00 0.0
1950 91 56 0.00 0.0
1949 90 54 0.00 0.0
1948 91 58 0.00 0.0
1947 96 64 0.00 0.0
1946 103 65 0.00 0.0
1945 97 64 0.00 0.0
1944 93 64 0.01 0.0
1943 86 69 0.00 0.0
1942 104 64 0.00 0.0
1941 97 62 0.00 0.0
1940 90 53 0.00 0.0
1939 90 47 0.00 0.0
1938 100 56 0.00 0.0
1937 94 55 0.00 0.0
1936 103 62 0.00 n/a
1935 98 54 0.00 n/a
1934 89 n/a 0.00 n/a
1933 81 47 0.00 0.0
1932 91 n/a 0.00 n/a
1931 108 60 n/a n/a
1930 95 46 0.00 n/a
1929 91 48 0.00 0.0
1928 93 49 0.00 n/a
1927 95 51 0.00 n/a
1926 94 53 0.00 0.0
1925 85 63 0.11 0.0
1924 91 44 0.00 0.0
1923 96 58 0.00 0.0
1922 89 55 0.00 0.0
1921 90 56 0.00 0.0
1920 93 53 0.00 0.0
1919 101 52 0.00 0.0
1918 84 49 0.00 0.0
1917 97 56 0.00 0.0
1916 88 50 0.00 0.0
1915 99 54 0.00 0.0
1914 80 38 0.00 0.0
1913 91 67 0.00 0.0
1912 87 56 0.01 0.0
1911 94 63 0.00 0.0
What's the all-time high for Boise on 7/21?
For the date of Jul 21, the highest temperature ever reached in Boise history is 108 °F which happened in 1931.
Highest Temperatures in Boise on July 21
Rank Temperature Year
1 108 °F 1931
2 107 °F 2005
3 105 °F 2023
4 104 °F 2006
4 104 °F 1942
6 103 °F 1936
6 103 °F 1946
6 103 °F 1988
9 102 °F 2000
9 102 °F 1960
9 102 °F 1955
What's the all-time low for Boise on 7/21?
For the date of Jul 21, the lowest temperature ever reached in Boise history is 38 °F which happened in 1914.
Lowest Temperatures in Boise on July 21
Rank Temperature Year
1 38 °F 1914
2 44 °F 1924
3 46 °F 1930
3 46 °F 1954
5 47 °F 1933
5 47 °F 1953
5 47 °F 1939
8 48 °F 1929
9 49 °F 1918
9 49 °F 1928
Lowest High Temperatures in Boise on July 21
Rank Temperature Year
1 70 °F 1954
2 73 °F 1972
3 78 °F 1993
4 80 °F 1914
4 80 °F 1973
4 80 °F 1952
7 81 °F 1965
7 81 °F 1933
9 83 °F 2014
10 84 °F 1951
10 84 °F 1918
10 84 °F 1992
10 84 °F 1984
What's the most it has ever rained in Boise on 7/21?
For the date of Jul 21, the most precipitation ever recorded in Boise history is 0.21 inches which happened in 1972.
All-Time Most Precipitation in Boise on July 21
Rank Precipitation Year
1 0.21 inches 1972
2 0.11 inches 1987
2 0.11 inches 1925
4 0.08 inches 1955
5 0.03 inches 1993
6 0.02 inches 1989
6 0.02 inches 2015
8 0.01 inches 1944
8 0.01 inches 2021
8 0.01 inches 1975
8 0.01 inches 1912
Weather Station Details
Years Station Coordinates
1940–2024 location
1911–1939 Meridian 1 W location
Notes
1: Daily averages are a moving average which includes 14 days before and after the date.
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